Study Of Motor Inhibition Deficits In Schizophrenia Using MRI, EventRelatedPotentialsand Transcranial Magnetic Stimulation
Funder
National Health and Medical Research Council
Funding Amount
$261,687.00
Summary
The aim of the proposed project is to study the neural mechanism underlying failures of motor-inhibition in patients with schizophrenia. The project will involve the use of fMRI and ERP measures during performance of a Stop-Signal Task, in order to explore the neural substrates of task performance in healthy subjects, and activational differences in schizophrenia patients. In a separate experimental session TMS will be applied in order to disrupt neural processing at cortical sites identified by ....The aim of the proposed project is to study the neural mechanism underlying failures of motor-inhibition in patients with schizophrenia. The project will involve the use of fMRI and ERP measures during performance of a Stop-Signal Task, in order to explore the neural substrates of task performance in healthy subjects, and activational differences in schizophrenia patients. In a separate experimental session TMS will be applied in order to disrupt neural processing at cortical sites identified by fMRI. Systematic use of TMS across different cortical sites will be used to compare effects of cortical site and subject group on task performance.Read moreRead less
Neural Changes Associated With Symptom Improvement In Posttraumatic Stress Disorder Following Exposure Treatment
Funder
National Health and Medical Research Council
Funding Amount
$223,855.00
Summary
Posttraumatic stress disorder (PTSD) is a chronic disorder with enormous psychological, social and economic consequences that affects approximately 10-15% of Australians. Recent international research is focused on identifying mechanisms underlying effective treatments of PTSD, in an attempt to understand both the processes that maintain PTSD, and to help target more precise interventions to prevent chronic PTSD, a disabling condition that creates an enormous economic burden on health and compen ....Posttraumatic stress disorder (PTSD) is a chronic disorder with enormous psychological, social and economic consequences that affects approximately 10-15% of Australians. Recent international research is focused on identifying mechanisms underlying effective treatments of PTSD, in an attempt to understand both the processes that maintain PTSD, and to help target more precise interventions to prevent chronic PTSD, a disabling condition that creates an enormous economic burden on health and compensation systems. This project will be the first study to identify the neural mechanisms underlying effective exposure-based treatment of PTSD. Exposure-based treatments are the current treatments of choice for PTSD, with several studies showing them to be highly effective in treating PTSD. Yet, the mechanisms and agents of change underlying this effective treatment remain unknown. Exploring the neural networks associated with effective treatment and symptom change will help identify and elucidate the mechanisms underlying exposure treatment. This has critical clinical implications, enabling insight into biological mechanisms underlying PTSD, more precise identification of populations that are less responsive to standard exposure-based treatments, and eventually will lead to better targeted and more effective treatment of chronic PTSD.Read moreRead less
High-resolution Brain Imaging Of Cerebellar Non-motor Functions
Funder
National Health and Medical Research Council
Funding Amount
$336,012.00
Summary
This project will develop and apply cutting-edge methods for high resolution, high-field (7 Tesla) functional brain imaging to assess non-motor functions within the cerebellum in the living human brain. This is crucial for understanding and later assessing changes in cerebellar networks and effects of treatment and rehabilitation strategies in a range of cerebellar disorders.
The Neurobiology Of Auditory Hallucinations: Characterisation Of Dysfunction Within A Neural Circuitry Model.
Funder
National Health and Medical Research Council
Funding Amount
$299,625.00
Summary
This is a highly innovative research proposal which is based on years of extensive research by our group. Auditory hallucinations are a prominent and potentially disabling symptom of psychosis, however it is extremely difficult to study them scientifically. Past research by our group (and other groups internationally) has indicated that an extensive network in the brain is activated whenever auditory hallucinations occur, but the source of this brain activity is unclear. It was thought that the ....This is a highly innovative research proposal which is based on years of extensive research by our group. Auditory hallucinations are a prominent and potentially disabling symptom of psychosis, however it is extremely difficult to study them scientifically. Past research by our group (and other groups internationally) has indicated that an extensive network in the brain is activated whenever auditory hallucinations occur, but the source of this brain activity is unclear. It was thought that the source may be the same brain circuits that are involved in generating inner speech or monitoring it, but our past research has ruled out these possibilities. Instead, our recent work suggests that auditory hallucinations may be associated with poorly functioning connections within central auditory processing circuits, specifically between left and right auditory association cortical regions. We conceptualise hallucinations as an abnormal and involuntary form of memory retrieval consequent to this dysfunction. Our study will pioneer methods of measuring connectivity in the brain circuits identified in our model, using a combination of functional magnetic resonance imaging (fMRI) and electroencephalographic (EEG) techniques in tandem with tests of central auditory processing. We believe that sufferers may benefit from understanding the physical processes which cause hallucinations. We also believe that a better understanding of hallucinations may lead to a better understanding of schizophrenia and the psychoses, which may in turn help in the development of better ways of treating these illnesses.Read moreRead less