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New research with scanning techniques has confirmed older ideas about the complementary functions of the two hemispheres of the human brain. One major contrast between the two hemispheres concerns their cognitive and emotional styles. The left hemisphere plans and confidently smooths over discrepancies that do not fit the plan while the right hemisphere looks at all possibilities and cautiously highlights the discrepancies. This research project studies the switch between the two hemispheres tha ....New research with scanning techniques has confirmed older ideas about the complementary functions of the two hemispheres of the human brain. One major contrast between the two hemispheres concerns their cognitive and emotional styles. The left hemisphere plans and confidently smooths over discrepancies that do not fit the plan while the right hemisphere looks at all possibilities and cautiously highlights the discrepancies. This research project studies the switch between the two hemispheres that alternately activates these contrasting, but equally valid, viewpoints. The switch is studied directly by optical recording from animal brains. The switch can also be studied in humans using a recent discovery from our laboratory:- that the perceptual rivalries are mediated by a hemispheric switch mechanism. Perceptual rivalry is a phenomenon where continuous, but ambiguous, stimulation leads to a back-and-forth alternation of complementary percepts, a phenomenon that fascinated Salvador Dali and is featured in many of his paintings. The nature of the perceptual switch during rivalry has been debated for centuries. New experiments link perceptual rivalry to the switch of attention between the hemispheres. Using perceptual rivalry as an indirect way to monitor hemispheric switching in humans, we discovered a remarkable feature. The back-and-forth switching process of perceptual rivalry is significantly slower in subjects with bipolar disorder (manic depression), even when they are between episodes and their mood is normal. The timing of the switching process is very stable in an individual, and appears to be similar in identical twins. The speed of the switch mechanism may therefore be inherited. Altered neural rhythms may underly the predisposition, known to run in familes, from which bipolar disorder can be triggered. The aim of the project is to test these propositions about the basis of this common disorder, affecting 1-2% of the population..Read moreRead less
Rates Of Psychosis Onset In A High Risk Population
Funder
National Health and Medical Research Council
Funding Amount
$310,359.00
Summary
Older studies of people at risk of schizophrenia found that about 35% of them developed psychosis within 1 year. However the risk has decreased lately to as low as 10%. They may still become psychotic but take longer to do so, or they may not develop psychosis at all. We need to study this so that those not “at risk” are not needlessly treated. We will follow up “at risk” people and determine their 6 year outcome. We will do scans to see if there are any brain changes associated with psychosis.
Brain Connectivity Imaging Markers To Confirm Diagnosis For Bipolar Vs. Unipolar Depression – A Connectome Approach.
Funder
National Health and Medical Research Council
Funding Amount
$434,369.00
Summary
Differentiating Bipolar disorders from Unipolar Depression is a major clinical challenge. This misdiagnosis hinders optimal clinical care and has many deleterious consequences such self-harm, increased chances of suicide, poor prognosis, and greater health care costs related to this disorder. This project will provide urgently-needed advance in accurate identification of Bipolar disorders using Magnetic Resonance Imaging and remove one of the key obstacles to accurate diagnosis.
Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the ....Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the identification of the genetic basis of the disease has proved exceedingly difficult, with numerous studies producing no definitive data. The lack of convincing results has been interpreted as an indication of complex genetic mechanisms and underlying differences between affected families and ethnic groups. Genetically isolated populations, where most individuals descend from a small number of founders, are believed to hold great potential for understanding the genetic basis of complex diseases, such as bipolar disorder. Affected subjects in such populations are likely to share the same predisposing genes, making these genes easier to identify. During the last 10 years, we have been involved in the study of bipolar disorder in one such population, with very promising results. In this project, we propose to take the research further by collecting more affected families, confirming the current positive findings and narrowing down the search to a small region, possibly a single gene. If successful, the study will be a major breakthrough which, by identifying a molecular pathway and disease mechanism, will contribute valuable and generally valid information on the biological basis of mood disorders.Read moreRead less
Novel Therapies, Risk Pathways And Prevention Of Mood Disorders
Funder
National Health and Medical Research Council
Funding Amount
$863,413.00
Summary
Concordant with the NHMRC priorities, this fellowship will principally focus on the development of novel therapies for mood disorders. We have pilot data that the amino acid, N acetyl cysteine reduces symptoms in unipolar and bipolar disorder and schizophrenia. We will further delineate the spectrum of efficacy, mechanisms of action and tolerability profile of this and related agents. We also will study risk factors and pathways for the development of depression, to develop public health strateg ....Concordant with the NHMRC priorities, this fellowship will principally focus on the development of novel therapies for mood disorders. We have pilot data that the amino acid, N acetyl cysteine reduces symptoms in unipolar and bipolar disorder and schizophrenia. We will further delineate the spectrum of efficacy, mechanisms of action and tolerability profile of this and related agents. We also will study risk factors and pathways for the development of depression, to develop public health strategies.Read moreRead less
Acute Stress Disorder And Posttraumatic Stress Disorder In Injured Children
Funder
National Health and Medical Research Council
Funding Amount
$125,000.00
Summary
The aim of this project is to develop the means to identify acute reactions to trauma that will predict chronic posttraumatic stress disorder (PTSD) in children after a traumatic injury. This project will conduct the first prospective analysis of acute stress disorder and chronic traumatic stress symptoms in children, develop diagnostic guidelines to identify acutely traumatized children who are at risk of PTSD, and identify biological, cognitive, and familial factors that mediate PTSD developme ....The aim of this project is to develop the means to identify acute reactions to trauma that will predict chronic posttraumatic stress disorder (PTSD) in children after a traumatic injury. This project will conduct the first prospective analysis of acute stress disorder and chronic traumatic stress symptoms in children, develop diagnostic guidelines to identify acutely traumatized children who are at risk of PTSD, and identify biological, cognitive, and familial factors that mediate PTSD development following trauma. Two hundred children (aged 7 - 12 years) who are admitted to hospital following a traumatic injury will be assessed for acute disorder within one month of the accident. They will be also be assessed for heart rate, blood pressure, memory patterns, and family responses during the initial assesment. Parents will also be assessed for their trauma reactions. All participants will be re-assessed at 6-months posttrauma, and again at 18-months posttrauma. These findings will establish the means to identify acutely traumatized children who are at risk of PTSD and open up opportunities for early intervention and prevention of PTSD.Read moreRead less
The CRE is a collaboration of researchers who have a national and strategic focus for research into asbestos related diseases and cancers. The National Centre for Asbestos Related Diseases provides a platform to build on Australia’s existing research expertise and encourages strong organisational linkages to ensure our research is systematic and complementary to existing research efforts in the area of asbestos related diseases.
High-Throughput Screening Of The Genome And Proteome In Postmortem CNS From Subjects With Schizophrenia
Funder
National Health and Medical Research Council
Funding Amount
$553,190.00
Summary
Schizophrenia is a serious psychiatric illness that effects ~1% of the Australia population. The underlying pathology of the illness remains unknown. This application seeks funding to use new technologies to screen approximately 60% of the expressed human genome and proteome to determine which genes are being differentially expressed in two regions thought to be important in generating the symptoms of the illness, the frontal cortex and hippocampus. This project will generate a large amount of d ....Schizophrenia is a serious psychiatric illness that effects ~1% of the Australia population. The underlying pathology of the illness remains unknown. This application seeks funding to use new technologies to screen approximately 60% of the expressed human genome and proteome to determine which genes are being differentially expressed in two regions thought to be important in generating the symptoms of the illness, the frontal cortex and hippocampus. This project will generate a large amount of data, however by comparing the data from subjects with schizophrenia to that from control subjects and subjects with bipolar disorder who were psychotic and being treated with antipsychotic drugs close to death will allow us to identify changes that are specific to schizophrenia. Genes that are expressing different levels of mRNA and protein will become prime targets for future investigations as they are likely to be central to the pathology of the illness.Read moreRead less
Optimising The Detection Of Early Glaucoma - Targeting Specific Visual Pathways In Combination With Structural Measures.
Funder
National Health and Medical Research Council
Funding Amount
$481,893.00
Summary
This study seeks to determine the optimal methods for detecting early glaucoma - a blinding disease - using new and diverse strategies for selective testing of specific visual pathways, in combination with structural analysis for optic nerve fibre loss. We hope to identify the best combination of available tests to enable earliest identification of glaucomatous damage.
Understanding The Role Of Muscarinic Receptors In The Pathophysiology Of Depression And Bipolar Disorder
Funder
National Health and Medical Research Council
Funding Amount
$480,074.00
Summary
The causes of bipolar disorder and major depressive disorder, which effect many Australians, remain unknown. We have recently shown decreases in muscarinic receptors in the brain of people with bipolar disorder and major depressive disorder. Muscarinic receptors are important in maintaining the functions of the brain that seem to be affected in people with bipolar disorder and major depressive disorder. Here we seek to understand how changes in muscarinic receptors occur in both disorders.