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How Adversity Dulls Our Perceptions

admin — Wed, 22 Feb 2012 15:59:00 +0000

4.67 (3 votes)

Healthcare Prof:

3.8 (five votes)

Adversity, we are told, heightens our senses, imprinting sights and sounds precisely in our memories. But new Weizmann Institute research, which appeared in Nature Neuroscience this week, suggests the precise opposite could be the case: Perceptions learned in an aversive context aren’t as sharp as those learned in other circumstances. The findings, which hint that this tendency is rooted in our species’ evolution, may help to clarify how post-traumatic pressure syndrome as well as other anxiety disorders create in many people.

To investigate studying in unfavorable circumstances, Dr. Rony Paz of the Institute’s Neurobiology Department, together with his student Jennifer Resnik, had volunteers learn that some tones result in an offensive outcome (e.g. a really poor odor), whereas other tones are followed by pleasant a outcome, or else by nothing. The volunteers were later tested for their perceptual thresholds – which is, how nicely they were in a position to distinguish either the “bad” or “good” tones from other similar tones.

As expected from previous studies, in the neutral or positive conditions, the volunteers became better with practice at discriminating in between tones. But surprisingly, when they identified themselves exposed to a negative, possibly disturbing stimulus, their efficiency worsened.

The differences in learning had been really very basic differences in perception. Right after understanding that a stimulus is related to extremely unpleasant knowledge, the subjects could not distinguish it from other similar stimuli, although they could do so beforehand, or in standard conditions. In other words, regardless of how well they normally learned new things, the subjects receiving the “aversive reinforcement” skilled the two tones as exactly the same.

Paz: “This likely created sense in our evolutionary past: If you’ve previously heard the sound of a lion attacking, your survival may possibly depend on a comparable noise sounding exactly the same to you – and pushing exactly the same emotional buttons. Your instincts, then, will tell you to run, rather than to consider no matter whether that sound was indeed identical towards the growl of the lion from the other day.”

Paz believes that this tendency may be stronger in individuals suffering from post-traumatic pressure syndrome. As an example, he points towards the 9-11 terror attacks in New York. A lot of of those that witnessed the strikes on the towers developed post-traumatic anxiety syndrome, which, for many of them, can be triggered by tall buildings. Intellectually, they could know the building just before them bears small similarity towards the destroyed towers, but on a more fundamental, instinctive level, they might perceive all tall buildings to be the same and thus associate them with terrifying destruction.

The scientific team is now investigating this idea in continuing analysis, in which they hope, amongst other issues, to identify the areas inside the brain that are involved in setting the different levels of perception. Paz: “We believe this is a trick of the brain that evolved to help us cope with threats, but is now dysfunctional in several instances. Besides revealing this really standard aspect of our perception, we hope to shed light on the development of such anxiety disorders as post-traumatic anxiety syndrome.”

Notes:

Dr. Rony Paz’s research is supported by the Nella and Leon Benoziyo Center for Neurological Illnesses; the Carl and Micaela Einhorn-Dominic Brain Research Institute; the Kahn Family Investigation Center for Systems Biology of the Human Cell; the Ruth and Herman Albert Scholars Plan for New Scientists; the Candice Appleton Household Trust; the Abraham and Sonia Rochlin Foundation; Gary Leff, Calabasas, CA; Pascal and Ilana Mantoux, Israel; and Sam Revusky, Canada. Dr. Paz could be the incumbent of the Beracha Foundation Career Development Chair.

Source:
Yivsam Azgad
Weizmann Institute of Science

Digital Forensic Examiners Face Anxiety, Role-Conflict

admin — Mon, 20 Feb 2012 03:59:00 +0000

Healthcare Prof:

Despite playing an increasingly important role in criminal investigations, digital forensic examiners face staffing cuts, heavy caseloads and stress inside police departments that may not fully comprehend their responsibilities, according to a study led by a Michigan State University criminologist.

Police officials really should think about hiring more digital forensic examiners or, failing that, enhancing their work environment, stated Thomas Holt, MSU assistant professor of criminal justice. His study appears within the May problem of the Journal of Contemporary Criminal Justice.

Digital forensic examiners collect evidence from digital media for example computers, cell phones along with other devices for use in the prosecution of crimes.

“There demands to be some consideration given to how we improve the work encounter for forensic digital examiners given that they’re going to be tasked a lot more and far more more than time,” Holt stated.

As states and nearby agencies struggle with decreased revenue, forensic labs in Detroit and elsewhere about the country have been closed, leaving a lot of existing labs understaffed. A recent report by the National Academy of Sciences said there is a backlog of forensic evidence as well as major questions concerning the capacity to reasonably train and staff labs to handle the load.

The job of a digital forensic examiner could be grim, particularly when it entails searching via computers for child pornography images, Holt stated.

In addition, since the field of digital forensics is reasonably new, the examiners’ colleagues and bosses might not comprehend – or even support – their role, he said.

The study identified that, overall, digital forensic examiners knowledge a moderate quantity of tension but also a high level of job satisfaction.

“It turns out, their levels of stress are directly tied to role conflict exactly where they have diverse demands on their time and unclear standards for completing a job,” Holt stated. “Generally, there’s no agreed upon approach to collect evidence or seize images; there are numerous methods to get to an finish point. And this can create a fairly significant amount of anxiety – imagine trying to clarify to your co-workers or your boss that this really is my job and this really is how I do it, but they do not necessarily comprehend.”

Holt conducted the study with Kristie Blevins in the University of North Carolina-Charlotte.

Source:
Tom Holt
Michigan State University

Serious Distress Linked To Higher Health Care Spending

admin — Fri, 17 Feb 2012 15:59:00 +0000

Healthcare Prof:

Sufferers of serious psychological distress spend an average of $1,735 more on wellness care each and every year compared to those without having the condition. However, recognizing psychological distress and treating it truly is often complex for patients and their doctors.

Two researchers in the Medical University of South Carolina have located those with severe psychological distress frequent their physicians far more than those without having distress, make more trips to the emergency room and demand, on typical, eight a lot more visits a year from home wellness agencies.

Leonard Egede, M.D., and Clara Dismuke, Ph.D., analyzed information from the more than 18,000 adults who took the 2007 Medical Care Expenditure Survey for a study appearing on the web in the journal General Hospital Psychiatry.

Distress symptoms mimic numerous of those noticed in bipolar and depression patients: feelings of nervousness, hopelessness and worthlessness; inability to be cheered up; and, believing every little thing is an effort.

“It’s a constellation of symptoms that suggest the require for further evaluation,” stated Egede, who also holds an appointment at the Ralph H. Johnson Veterans Affairs Medical Center in Charleston, S.C.

Physicians need to determine the root trigger of the distress and Egede suggested implementing screening for severe distress as part of main care. He said doctors should pay higher attention to diagnosing psychological distress now that experts know it to have a major economic influence on the health care system.

The convention is to screen for diseases when it afflicts at the least 6 percent of individuals, Egede said The new study identified the prevalence of critical distress to be greater at four.9 percent than four percent as previously shown in studies.

However, Ronald Kessler, a professor of health care policy at the Harvard Medical School, pointed to some studies that said such screenings were not price useful, despite the greater rate of medical care the mental health patients use.

Those studies identified the quality of mental health remedy was poor in the main care level.

“Assuming high quality of care improved, though, then I believe it would be very good to screen routinely for mental disorders in main care,” Kessler stated. “Exactly what to screen for and where to draw the line in terms of require for therapy are complicated troubles that would call for investigation.”

Source: Health Behavior News Service

Study Suggests Digestive Problems Early In Life May possibly Increase Risk For Depression

admin — Wed, 15 Feb 2012 03:59:00 +0000

2.five (two votes)

Healthcare Prof:

4 (1 votes)

Depression and anxiety may possibly result from short-term digestive irritation early in life, based on a study of laboratory rats by researchers in the Stanford University School of Medicine. The findings recommend that some human psychological conditions could be the result, instead of the trigger, of gastrointestinal disorders like irritable bowel syndrome.

“A lot of investigation has focused on understanding how the thoughts can influence the body,” stated Pankaj Pasricha, MD, professor and chief of gastroenterology and hepatology. “But this study suggests that it might be the other way around. Gastric irritation in the course of the initial couple of days of life might reset the brain into a permanently depressed state.”

Clearly not all stomach upsets lead to lifelong psychological issues, nonetheless. The impact of the irritation could depend on when it happens during development or the genetic makeup of the affected person, the researchers believe. In specific, the viscera, or internal organs, are especially vulnerable early in development.

Pasricha will be the senior author of the study, which was published on Might 12 in PLoS One. Investigation associate Liansheng Liu may be the lead author of the study. The Stanford scientists collaborated with researchers from the University of California-San Francisco and also the University of Kansas on the study.

About 15 to 20 percent of men and women knowledge what physicians call functional dyspepsia, or persistent or recurring pain inside the upper abdomen. Researchers like Pasricha have lengthy noted that these men and women are also more most likely than their peers to be anxious or depressed. Conventional wisdom has held that tension hormones related to a patient’s altered mood had been responsible for his or her digestive disturbances.

However, there’s one more option. “The gut and also the brain are hardwired together by the vagus nerve, which runs from the brain to the body’s internal organs” said Pasricha. “In addition, the gut has its own nervous program that’s reasonably independent. So the communication between the gut and the adult brain is elaborate and bi-directional, and alterations inside the gut are signaled directly towards the brain.”

Because several of these patients date their gastrointestinal problems back to early childhood, just before their psychological symptoms began, Pasricha and his colleagues wondered if the digestive disturbances could instead be causing the mood disorders. The possibility was bolstered by the fact that recent research by other groups has linked depression and anxiety in humans to modifications inside the composition of gut bacterial populations.

To test their hypothesis, the researchers utilized a laboratory model of functional dyspepsia they had developed years earlier. They subjected 10-day-old laboratory rats to mild stomach irritation day-to-day for six days. They had previously shown that for the duration of the vulnerable newborn period such remedy, which causes a temporary inflammation or injury, results in hypersensitivity and functional abnormalities that persist lengthy following the initial damage has been repaired.

“We hypothesized that this remedy may also be affecting the development of central nervous system, and driving the animals to anxiety and depression,” said Pasricha.

Indeed, as the researchers assessed the behavior of the treated rats when the animals were 8 to 10 weeks old, they identified that those rats with early gastric irritation were considerably more most likely than their peers to display depressed and anxious behaviors such as a decreased consumption of sugar water, less-active swimming in a pool of warm water plus a preference for dark rather than light areas in a maze.

The treated rats also exhibited elevated levels of the pressure hormones corticosterone and corticotrophin following an injection of saline, and had higher-than-normal resting levels of corticosterone and corticotrophin-releasing factor, or CRF. Blocking the animals’ ability to perceive sensation from their gut with a drug didn’t affect their behavior, indicating that the rats were not responding to ongoing pain. In contrast, inhibiting the activity of CRF, which is identified to be associated with depression in humans and animals, caused the treated rats to behave much more usually in the tests.

“It seems that when the rats are exposed to gastric irritation at the proper point in time,” said Pasricha, “there is signaling across the gut to the brain that permanently alters its function.”

The researchers are now planning to investigate specifically how that signaling is initiated and acts inside the brain, and whether or not it may be potential to create new methods to treat depression and anxiety in humans.

“We’d like to know whether the vagus nerve is involved, and confirm what changes may occur within the brain in response to this signal,” said Pasricha. “The vast majority of humans do not experience any long-lasting consequences from transient infections. But there might be subset of patients who are genetically predisposed to this impact by mechanisms we don’t yet comprehend but. Our hope is that this work will open another avenue for exploring, understanding and treating these very complex syndromes.”

In particular, electrical stimulation of the vagus nerve has lately been approved by the Food and Drug Administration for treatment-resistant depression; this investigation may aid researchers far better fully grasp and optimize this new approach.

Notes:

In addition to Pasricha and Liu, other Stanford researchers involved in the perform contain Robert Sapolsky, PhD, the John A. and Cynthia Fry Gunn Professor, and Kshama Mehta, PhD, an instructor in gastroenterology and hepatology. The research was funded by Stanford’s Department of Medicine.

Source:
Krista Conger
Stanford University Medical Center

Study Suggests Benefits Of Counseling And Assessment For Expectant Fathers

admin — Sun, 12 Feb 2012 15:59:00 +0000

Healthcare Prof:

1 (1 votes)

A University of Missouri researcher has located that stress associated to pregnancy uniquely affects the wellness of expectant fathers, which in turn, influences the wellness of expectant mothers and their infants. Health services should incorporate counseling and assessments for men and ladies to decrease stressors and promote positive pregnancy outcomes, says ManSoo Yu, assistant professor in MU’s Public Wellness Program.

Mental distress in pregnant ladies – caused by anxiety, lack of social support or low self-esteem – is associated with poor infant health. The importance of psychological and social aspects in women is properly documented, but couple of studies have examined these variables in males. Males play an essential role in supporting and caring for pregnant females, Yu said.

“Too typically, men are treated as observers of the pregnancy approach,” stated Yu, assistant professor in the College of Human Environmental Sciences. “Acknowledging and addressing the emotional well-being of males as well as females is suggested. Supplying prenatal care for expectant fathers can encourage males to have a proactive role in pregnancy, which will allow for better maternal and infant well being outcomes.”

Yu discovered that males procedure pregnancy-related issues, which includes family problems, preparing for change and feeling overwhelmed, as financial stressors, whereas girls take into account them emotional stressors. Men and females also perceive support from their partners differently. Inside the study, males received more emotional support from their partners, and girls received tangible support, through actions such as support with tasks or care. It’s potential that ladies give a lot more emotional support simply because they really feel it’s crucial although males give tangible support since they believe it is critical.

“Understanding these differences will assist practitioners provide far better assistance and services for expectant parents,” Yu stated. “For example, men could write budgets to alleviate financial pressure and women can seek counseling to understand emotional stressors. Men and girls can discuss and understand about prospective stressors to turn out to be far better partners and boost the health of each other and their infant.”

To much better realize men and women’s emotions in the course of pregnancy, the Prenatal Psychosocial Profile (PPP) was given to 132 expectant mothers and fathers. The PPP can be a standard assessment, generally given only to expectant mothers to measure tension, support of their partner and self-esteem.

Another discovering was that females had higher self esteem than men during pregnancy. Self-esteem is an crucial dimension specifically for the duration of pregnancy, since lower self-esteem is related to substance use. In specific, locating approaches to reduce men’s self-criticism about their skills might be crucial since, within the study, substance abuse was associated with emotional stress among males.

The study was published in a recent problem of the Journal of Advanced Nursing.

Source:
Emily Martin
University of Missouri-Columbia

Fear Of Friday 13th Called Friggatriskaidekaphobia

admin — Fri, 10 Feb 2012 03:59:00 +0000

4.6 (five votes)

Healthcare Prof:

5 (4 votes)

Article Opinions:2 posts
The Friggatriskaidekaphobia phenomenon is really a phobia for Friday 13th, a superstition that has existed for hundreds of years in practically each and every corner of the globe. In India’s movie industry, they make an effort to avoid releasing new films on Friday 13th as a result of a fear it is going to do badly. Even stock markets about the world often see much less activity on this date. Normally, airlines also report a drop in passengers.

If you derive comfort from stroking a rabbit’s foot for great luck, or blow away an eyelash and make a wish, today may well not be a good day for you. For people who have Friggatriskaidekaphobia, these days is actually a especially unpleasant day.

Why do some of us fear Friday 13th so considerably?Chair of the Department of Psychology at Cornell University, Thomas Gilovich says some people are afraid of this date since they link it to unpleasant issues or events in their life.

Gilovich said:

“The mind is an associative program and if anything bad happens to you on Friday the 13th, the two will probably be forever associated within your mind and all those uneventful days in which the 13th fell on a Friday will be ignored.”

Through psychology, Gilovish says, we can better fully grasp the workings of superstitions and why folks do certain things and behave in a particular way.

Between 17 and 21 million Americans have a phobia of Friday 13th, based on the Tension Management Center and Phobia Institute in North Carolina.

Gilovich stresses that there’s no evidence whatsoever linking Friday 13th to poor luck or unpleasant events.

Gilovich added:

“”People hold a number of beliefs without having understanding the basis behind them or where they came from.”

Apparently, interior designers and architects tend not to label the 13th floor of a developing.

Psychology professor, Harvard University, Daniel Wegner has been researching into why many people see causal connections, especially when none exists.

Wegner said:

“Our minds trigger our actions along with other issues that occur in the world. It seems that we typically think we’re powerful causal agents just simply because we occur to think of something prior to it occurs!”

Often in sports, Wegner explains, individuals who think about certain things just before they occur, can eventually believe that they had been the driving force behind their occurrence.Wegner stated:

“This is why sports fans fear going towards the refrigerator since then their team may lose on Tv. If they are not actively rooting for their team and thinking good thoughts, possibly they’ll be the ones who tip the balance towards the loss. Or at least, really feel that they did.”

According towards the Dutch Centre for Insurance Statistics, fewer accidents and fires happen on Friday 13th, possibly since people are much more careful or just stay at home.

Written by Christian Nordqvist
Copyright: Medical News Today
Not to be reproduced with out permission of Medical News Nowadays

Utilizing War Games To Treat Post-traumatic Pressure Disorder

admin — Tue, 07 Feb 2012 15:59:00 +0000

5 (1 votes)

Healthcare Prof:

For those soldiers worried concerning the stigma associated with seeing a therapist, virtual reality applications for the therapy of post-traumatic pressure disorder (PTSD) could be the option to the traditional “talk therapy.” A brand new paper1, by Albert Rizzo from the University of Southern California, Institute for Creative Technologies, Los Angeles, and his team, evaluations how virtual reality applications are getting created and implemented across various points within the military deployment cycle, to stop, identify and treat combat-related PTSD.

Their findings are published on the internet inside the June issue2 of Springer’s Journal of Clinical Psychology in Medical Settings, specially devoted to contemporary psychological advances as they apply to soldiers and their families.

The stressful experiences that characterize the Operation Iraqi Freedom/Operation Enduring Freedom war fighting environments have produced significant numbers of returning military personnel at danger of creating PTSD. At the identical time, virtual reality (VR) has stepped into clinical practice, consequently of technological advances which have created it feasible and cost-effective to run VR systems on a personal computer.

What Rizzo and team’s perform shows is that VR is in a position to deliver exposure therapy – the number 1 therapy suggested for PTSD – by immersing returning soldiers in simulations of trauma-relevant environments. The emotional intensity of the scenes might be precisely controlled by the clinician in collaboration using the patients’ wishes. VR enables multi-sensory and context-relevant cues that evoke the trauma without having exclusively relying on the patient to actively keep in mind and envision actual experiences (as is needed in standard exposure approaches).

Rizzo and team assessment their immersive virtual reality exposure therapy (VRET) system for combat-related PTSD. Their application consists of a series of virtual scenarios, based on accounts by returning soldiers of what it’s like out there in a war environment.

Their clinical results to date are encouraging. 1 test in certain identified that 80 percent of those who completed remedy with this system showed clinically meaningful reductions in PTSD, anxiety and depressive symptoms. Additionally, anecdotal evidence from patient reports suggests improvements in their everyday lives for at the least 3 months after therapy.

The researchers are also exploring other applications for their program, including tension resilience coaching i.e. to teach soldiers coping tactics prior to deployment to better prepare them for the sorts of emotional challenges they are most likely to encounter within the combat environment. Yet another area of interest for the program will be the identification of those soldiers who are ready to get back into the field versus people who need further therapy or more time in between deployments.

According to the authors, this new approach to psychotherapy has widespread ramifications: “The current generation of young military personnel, having grown up with digital gaming technology, may truly be more attracted to and comfy with participation in virtual reality exposure therapy. The need for remedies to address the mental health demands of our military personnel, alongside the virtual revolution that has taken location, has led to a state of affairs which stands to transform the vision of future clinical practice and analysis.”

Sources: Springer Science+Business Media, AlphaGalileo Foundation.

IU Northwest Researchers To Study Wellness Effects Of Life Stress

admin — Sun, 05 Feb 2012 03:59:00 +0000

4 (1 votes)

Healthcare Prof:

Over the years, there have been numerous studies mapping the effects of stressful life events on a person’s wellness. But, perhaps none much more comprehensive than the 1 anticipated by a group of Indiana University Northwest researchers, who’re making use of the power of the Web to gather a substantially greater amount of analysis over a longer period of time than previous studies.

IU Northwest Professor of Nursing Linda Delunas, Ph.D., the study’s lead investigator, says she and her collaborators, Professor of Business Charles Hobson, Ph.D, Assistant Professor of Nursing Susan Rouse, Ph.D, and Professor of Information Systems Ranjan Kini, Ph.D., will collect data from subjects in the U.S. and abroad each and every three months throughout a period of numerous years. The team hopes to gain a much better understanding of how the cumulative effect of stressful life events can contribute to health problems more than both the short- and long-term.

At 1st notion, business and nursing faculty may well seem unlikely collaborators for a study study. But, the idea was actually born from a tool Hobson had been employing in his human resources and organizational behavior courses. Landmark study in 1967 had shown that a high score on the Social Readjustment Rating Scale was correlated to a significant immune program breakdown in the coming year as a result of anxiety degrading your immune method.

Over the years, the scale had become less and less relevant to his students, so Hobson and some colleagues created a new list of stressful events with the aid of a market study firm and mental health professionals. They created a new list of 51 stressful life events that was published in 1998.

The team says this new investigation could be instrumental not merely in determining a person’s future risk for wellness issues but also in assessing what specific wellness concerns may develop. To accomplish this, though, an extraordinarily large sample is required to determine trends, the researchers say.

The study team brought Kini on board to take the data collection process to the Web and to help with data mining and creating the encryption and safety firewalls required for protecting sensitive health-related information. Kini is an international expert in Information Technology, having taught the subject in several foreign countries.

With potentially thousands of participants providing information more than the short- and long-term, the researchers expect to eventually predict what kinds of things could happen to someone who has had a bad year or what specific illness processes that person may possibly be at risk for.

“There could be many studies that develop,” Delunas says, “depending on the ways in which we can slice and dice the data.”

Depending on what trends develop out of the sample, the team can study the well being effects of stress based on ethnicity, gender, geographical area, life-style variables, and a lot more. In addition, they hope to be able to study protective elements within the face of stressful life events, like the effects of diet, exercise and personality in protecting a person against illness.

“This is unique because it has never been studied in fairly the same way just before, not with this instrument and not on the Web and not with this level of detail,” Delunas says.

Hobson and Delunas have teamed up on research projects just before. Their function on stress-reduction techniques and how well they perform was published within the International Journal of Management. In reality, a teaching module designed to assist people cope with tension is part of the Web site that study participants will use to input their data.

“The Web site will allow us to much more comprehensively identify and describe the ways in which life-events tension affects well being,” Hobson says. “Ultimately, we hope to be able to educate and empower individuals to deal more effectively with life-event tension and minimize or eliminate its deleterious impact.”

Delunas says another advantage of Web-based study is the ability to follow-up with participants even if they move around frequently. Participants also will probably be in a position to get immediate feedback on how their stress level compares to others in the sample.

The team expressed gratitude to the IU Northwest School of Business and Economics, School of Nursing and College of Well being and Human Services and to Study Technologies Life Sciences of IU Data Technology Services (UITS) for their support.

The study is open to anyone over the age of 18 who can read English. To participate within the study visit here.

Source:
Indiana University Northwest

Study Links Anxiety And Depression To Risk Taking In Young Drivers

admin — Thu, 02 Feb 2012 15:59:00 +0000

Healthcare Prof:

5 (1 votes)

Young drivers who expertise anxiety and depression are more likely to take risks on the road, based on a brand new study by Queensland University of Technology (QUT).

The results of the study led by Bridie Scott-Parker, from QUT’s Centre for Accident Analysis and Road Safety – Queensland (CARRS-Q), have been published in the international journal Injury Prevention nowadays.

Mrs Scott-Parker said the study of more than 760 young drivers, who had been on their provisional licence, found anxiety and depression accounted for 8.5 per cent of the risky driving behaviour reported by these young adults.

“The association was greater in girls than in males, with 9.five per cent being explained by psychological distress in women compared with 6.7 per cent in men,” Mrs Scott-Parker said.

“We already know that psychological distress, for example anxiety and depression, has been linked to risky behaviour in adolescents including unprotected sex, smoking and high alcohol consumption.

“What this study sought to do was examine whether or not or not psychological distress could also be linked to risky driving behaviours in young men and women, like speeding, not wearing a seat belt and making use of a mobile phone even though at the wheel.”

Mrs Scott-Parker stated the study could be used to identify young drivers most at threat of psychological distress and for that reason a greater crash danger on the road by means of risky driving.

“Young folks presenting to medical and mental health professionals could be screened for present psychological distress particularly if they have incurred injury by way of risky behaviour,” she stated.

“These drivers could be targeted with specific road safety countermeasures and efforts produced to increase their mental wellbeing by monitoring them for signs of depression and anxiety.”

Mrs Scott-Parker stated up until now the relationship among novice risky driving behaviour and psychological distress had not been clearly identified or quantified.

“Identifying at danger people is vital,” she stated.

“Once identified, interventions could be tailored to target specific groups of at-risk drivers and also from a mental well being perspective this could result in improved well-being for the adolescent young driver,” she said.

CARRS-Q is actually a member of QUT’s Institute of Wellness and Biomedical Innovation.

Source:
Queensland University of Technology

Depression, Mood Disorders Might Be Due To Gut Problems Early In Life

admin — Tue, 31 Jan 2012 03:59:00 +0000

3 (three votes)

Healthcare Prof:

1.five (2 votes)

Gut troubles such as gastric irritation early in life could alter the way the brain is wired and raise the threat of depression and anxiety later on, said American researchers who discovered that gastric irritation in newborn rats appeared to enhance expression of the tension hormone, corticotrophin-releasing factor CRF, and raise sensitivity to stress later in life.

Many current explanations for the link among gut troubles and mood disorders is that the mood disorder causes the gut dilemma: anxiety and depression alter anxiety hormone levels and these trigger the gastric troubles like irritable bowel and functional dyspepsia.

But Dr Pankaj Pasricha of Stanford University School of Medicine in California and colleagues recommend in a paper published lately in PLoS ONE that some human psychological disorders could possibly be the result, rather than the cause, of gastrointestinal difficulties like irritable bowel syndrome.

“Gastric irritation for the duration of the very first few days of life could reset the brain into a permanently depressed state,” stated Pasricha, a professor and chief of gastroenterology and hepatology.

“The gut along with the brain are hardwired together by the vagus nerve, which runs from the brain towards the body’s internal organs,” Pasricha told the press.

He explained that the gut has its own, relatively independent nervous program and that “communication in between the gut and the adult brain is elaborate and bi-directional, and adjustments within the gut are signaled directly to the brain”.

As it is clear that not all stomach upsets result in lifelong mood disorders, the researchers recommend it really is the timing of the irritation that’s essential. Together with colleagues from the University of California-San Francisco as well as the University of Kansas, Pasricha and his team at Stanford tested these ideas employing laboratory rats.

In prior work, the Stanford team had shown that inducing mild stomach irritation in newborn rats, causing temporary gut inflammation or injury, led to raised sensitivity and functional abnormalities that lasted long following the initial damage had been repaired.

This led them to wonder if this type of injury early in life may well also affect the development of the central nervous method, and in turn, trigger depression and anxiety.

So they induced functional dyspepsia in 10-day-old male rats and then assessed their behavior when they reached 8 to 10 weeks old. They discovered that compared to untreated rats, the treated rats were far more likely to display depressed and anxious behaviors for example less consumption of sugared water and less activity in forced-swimming tests, and a preference for dark rather than light areas in a maze.

Also, following a tension test of a saline injection, the treated rats also had greater than typical resting levels of the tension hormones corticosterone and corticotrophin-releasing factor, or CRF.

To confirm that the difference in behavior was not due to the rats sensing gut discomfort, the researchers blocked their ability to feel sensation from their gut having a drug, and discovered it created no difference to their behavior.

In contrast, when they blocked the action of CRF, which is known to be linked to depression in humans along with other animals, they found the treated rats behaved much more like the untreated rats in tests.

The researchers suggested in their conclusions that “transient gastric irritation within the neonatal period can induce a long lasting enhance in depression- and anxiety-like behaviors,”, and that “depression-like behavior could possibly be mediated by the CRF1 receptor”.

Pasricha said:

“It seems that when the rats are exposed to gastric irritation in the proper point in time, there is signaling across the gut towards the brain that permanently alters its function.”

As a next step, the researchers is going to be investigating what triggers such a signal and how it acts within the brain, and looking in the potential for such a discovery to result in new treatments for depression and anxiety in humans.

Pasricha said they’d like to know whether the vagus nerve is involved and how it affects the brain.

“The vast majority of humans don’t encounter any long-lasting consequences from transient infections,” he noted.

“But there may be subset of patients who’re genetically predisposed to this effect by mechanisms we don’t but understand,” he added.

The US Food and Drug Administration (FDA) has lately approved electrical stimulation of the vagus nerve as a new treatment for depression that does not respond to other treatments. The researchers hope their efforts will support to improve understanding in this form of treatment.

Stanford’s Department of Medicine funded the study.

“Transient Gastric Irritation in the Neonatal Rats Leads to Changes in Hypothalamic CRF Expression, Depression- and Anxiety-Like Behavior as Adults.”
Liansheng Liu, Qian Li, Robert Sapolsky, Min Liao, Kshama Mehta, Aditi Bhargava, and Pankaj J. Pasricha
PLoS ONE 6(five): e19498. Published on the internet 12 Might 2011.
DOI:10.1371/journal.pone.0019498

Additional source: Stanford School of Medicine.

Written by: Catharine Paddock, PhD
Copyright: Medical News Today
Not to be reproduced without having permission of Medical News Nowadays