Adult Consequences Of Childhood Exposure To Psychological Trauma
Funder
National Health and Medical Research Council
Funding Amount
$292,530.00
Summary
The importance of childhood experience to adult adjustment (DOES THIS MAKE SENSE) is an issue of general public health interest. In particular, in the area of personality development, there are a number of theories concerning the importance of childhood experience and developmental stresses on later personality, development, psychological functioning and physical health. More recently there has been debate on the accuracy with which adults areable to remember traumatic experiences in childhood. ....The importance of childhood experience to adult adjustment (DOES THIS MAKE SENSE) is an issue of general public health interest. In particular, in the area of personality development, there are a number of theories concerning the importance of childhood experience and developmental stresses on later personality, development, psychological functioning and physical health. More recently there has been debate on the accuracy with which adults areable to remember traumatic experiences in childhood. This study will follow a group of 808 primary school children who were exposed to the 1983 Ash Wednesday bushfires in SOuth Australia. They were involved in a study which examined them two months, eight months and twenty six months after the disaster. This rich descriptive set of information about these children and their families forms an objective data base against which their adult recall of the experience can be judged. The symptoms of these children were also documented at the time as was their disaster exposure. The impact of this one event, in the context of the other developmental influences will be examined as determinants of their adjustment in adult life. Finally, there has been an increasing interest in the way that previous traumatic exposure influences the nature of the hormonal response to stress. Using a test of functioning of the cortisol system, the stress response of this population will be compared with a control population who were also studied at the time of the original disaster.Read moreRead less
Stress And HPA Axis Function In First-episode Psychosis: Relationship With Clinical Features And Dynamic Brain Changes
Funder
National Health and Medical Research Council
Funding Amount
$182,378.00
Summary
This research examines the role of stress in the progression of psychotic disorders- a group of severe mental illnesses that include schizophrenia. We will investigate whether patients with psychosis who have an abnormal response to stress experience more severe and distressing symptoms as well as brain volume changes during the initial phase of illness. The results of this research could have important implications for the development of more effective treatments for these disorders.
Modeling The Two-hit Hypothesis Of Schizophrenia: Combined Neonatal Stress And Postnatal Corticosterone In Rats
Funder
National Health and Medical Research Council
Funding Amount
$318,500.00
Summary
Schizophrenia is a severe mental illness defined by a number of symptoms including hallucinations, delusions, social withdrawal and cognitive impairment. Factors very early in development have been suggested to induce an increased vulnerability to this illness. Recently, it was suggested that another major event, later in life, would be needed before vulnerable individuals would develop schizophrenia. The aim of this project is to model this two-hit hypothesis in rats. We will compare the effect ....Schizophrenia is a severe mental illness defined by a number of symptoms including hallucinations, delusions, social withdrawal and cognitive impairment. Factors very early in development have been suggested to induce an increased vulnerability to this illness. Recently, it was suggested that another major event, later in life, would be needed before vulnerable individuals would develop schizophrenia. The aim of this project is to model this two-hit hypothesis in rats. We will compare the effect of various neonatal maternal separation protocols as an early stressful event, followed by chronic treatment with the stress hormone corticosterone at various stages later in life. We will also perform a detailed anatomical study of the hippocampus of these rats. This brain area has been implicated in the development of schizophrenia in humans. We will also investigate if treatment with antipsychotic drugs can prevent or reverse behavioural and neuroanatomical changes seen in the rats. This will be the first comprehensive study to model this two-hit neurodevelopment hypothesis of schizophrenia and will provide an experimental verification of a clinical concept which is very difficult to prove in patients.Read moreRead less
Posttraumatic Mental Health: Advancing Understanding Of Diagnosis, Treatment And Mechanisms
Funder
National Health and Medical Research Council
Funding Amount
$7,590,920.00
Summary
Psychological disorders following exposure to trauma account for a significant proportion of the burden of disease in terms of personal suffering, decreased productivity, occupational dysfunction, and demands on health services. This project will enhance the nation's capacity to reduce psychological problems after trauma. This project will consolidate a critical mass of Australia's leading trauma researchers that will ensure that Australia retains its leading edge in posttraumatic research.
Posttraumatic Mental Health: Enhancing Resilience And Recovery
Funder
National Health and Medical Research Council
Funding Amount
$5,043,011.00
Summary
Psychological disorders following exposure to trauma account for a significant proportion of the burden of disease in terms of personal suffering, decreased productivity, occupational and social dysfunction, medical disorders, and demands on health services. The overall goal of this project is to enhance the nation’s capacity in research into the identification of risk factors for posttraumatic mental disorders, study of neurophysiological factors mediating these disorders, and evaluation of tre ....Psychological disorders following exposure to trauma account for a significant proportion of the burden of disease in terms of personal suffering, decreased productivity, occupational and social dysfunction, medical disorders, and demands on health services. The overall goal of this project is to enhance the nation’s capacity in research into the identification of risk factors for posttraumatic mental disorders, study of neurophysiological factors mediating these disorders, and evaluation of treatment strategies to reduce psychological morbidity after trauma. This project will develop a critical mass of Australia’s leading trauma researchers that will ensure that Australia retains its leading edge in posttraumatic research.Read moreRead less
Cognitive Behaviour Therapy For Posttraumatic Stress Disorder In Police Officers
Funder
National Health and Medical Research Council
Funding Amount
$190,255.00
Summary
Posttraumatic stress disorder (PTSD) is a significant anxiety disorder that affects many serving police officers. Although cognitive behaviour therapy (CBT) is the treatment of choice to treat PTSD, it has never been validated in police offcers. This project represents the first controlled trial of applying CBT to reduce PTSD in police officers.
Studying The Two Hit Hypothesis Of Psychiatric Illness: Role Of Brain-derived Neurotrophic Factor (BDNF)
Funder
National Health and Medical Research Council
Funding Amount
$469,553.00
Summary
Early environmental factors may play an important role in the development of psychiatric illnesses, such as schizophrenia and depression. We will study an animal model which combines early developmental stress followed by treatment with a stress hormone or chronic cannabis use in adolescence. We will assess behavioural changes and the role of a growth factor in the brain, BDNF. This wil lead to a better understanding of the role of neurodevelopmental stress in psychiatric disease.
Brain And Skin Blood Flow: New Animal Model For Understanding Psychiatric Disorders And Evaluating Psychotropic Agents
Funder
National Health and Medical Research Council
Funding Amount
$874,840.00
Summary
We suddenly become pale when we get a fright; cutaneous blood vessels are linked to psychological function. The skin vessel constriction response occurs because special neurochemical pathways in the brain send messages to the spinal cord, and from there messages traverse peripheral sympathetic nerves to constrict the blood vessels in the skin. By measuring skin blood flow in the rabbit ear and the rat tail we have been able to discover the major brain pathway by which the constrict-the-skin-bloo ....We suddenly become pale when we get a fright; cutaneous blood vessels are linked to psychological function. The skin vessel constriction response occurs because special neurochemical pathways in the brain send messages to the spinal cord, and from there messages traverse peripheral sympathetic nerves to constrict the blood vessels in the skin. By measuring skin blood flow in the rabbit ear and the rat tail we have been able to discover the major brain pathway by which the constrict-the-skin-blood-vessels message reaches the spinal cord. The pathway involves the amygdala, a forebrain region important in emotional expression and the raphe nuclei in the medulla oblongata. Drugs which affect psychological function also effect skin blood flow. Ecstasy, the street drug used to induce euphoria also constricts the skin vessels, and, sadly, the body temperature may increase so much that death ensues. Ecstasy vigorously constricts the skin blood vessels in rabbits, and temperature increases. Ecstasy is thought to act on serotonin-containing nerve cells in the brain, releasing serotonin (5-HT) onto special 5-HT2A receptors. Activation of these receptors affects both psychological function and skin blood flow. Modern drugs used to treat schizophrenia, so called atypical antipsychotics like clozapine and olanzapine, are thought to act as antagonists at 5-HT2A receptors in the brain. We were thus very excited when we discovered in our rabbit model that clozapine reverses the skin vasoconstriction induced by ecstasy. This means that we have specific hypotheses concerning the actual brain pathways and neurotransmitters whereby ecstasy and clozapine exert their effects on skin blood flow. Elucidating these pathways in rabbits and rats will provide solid knowledge concerning the mechanism of action of the atypical antipsychotics, and it may well prove possible to use our animal model to predict whether proposed new antipsychotic agents will be therapeutically effective.Read moreRead less
The Role Of Trauma Related Anger And The Cycles Of Violence In Post Conflict Countries: A Follow Up Study In Timor Leste
Funder
National Health and Medical Research Council
Funding Amount
$560,618.00
Summary
Our 2004 East Timor study showed that men who suffered abuses remain angry. We will follow-up these men to see if those who remained angry were more likely to be involved in social unrest and violence. We will also find out what factors make angry men more likely to act violently. This study will provide information to help agencies assist men overcome anger to avoid future violence.