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Impact Of Somatic Versus Dendritic Inhibition On Neuronal Output
Funder
National Health and Medical Research Council
Funding Amount
$1,047,686.00
Summary
The brain is made up of literally billions of neurons connected in complex networks. These neurons come in two primary flavors - excitatory and inhibitory - which work in balance. Too much excitation and the brain becomes epileptic, too much inhibitory and we go into a coma. This proposal focuses on the role of specific inhibitory cell types in regulating brain function, and has relevant to a range of neurological disorders from epilepsy, to schizophrenia to depression.
A DENDRITIC SUBSTRATE FOR THE CHOLINERGIC CONTROL OF NEOCORTICAL OUTPUT
Funder
National Health and Medical Research Council
Funding Amount
$898,340.00
Summary
The forebrain cholinergic system controls neocortical activity and cognitive function. This project will investigate the mechanisms by which the cholinergic system controls neocortical circuit activity in rodent models using advanced optical and electrical recording methods. The results will provide a foundation for the understanding of how dysfunction of the cholinergic system results in cognitive decline in humans, and identify new targets for improved treatment of human cognitive impairment.
Role Of Dendritic Information Processing In Visual Circuit Computations
Funder
National Health and Medical Research Council
Funding Amount
$895,244.00
Summary
Vision is the primary sensory modality in man, and its disturbance carries an enormous socio-economic burden. The dynamic operations of the neuronal assemblies that underlie vision are poorly understood, partly because of an incomplete description of the computational properties of visual neuronal circuits. The aims of the application are to mechanistically dissect defined computational operations of visual neural circuits using advanced electrophysiological and optical recording techniques.
A Potential Analgesic Target In A Novel Clinically-relevant Neuropathic Pain Pathway.
Funder
National Health and Medical Research Council
Funding Amount
$685,811.00
Summary
Persistent pain arising from tissue damage, to nerves, muscles or joints for example, is devastating for patients and a huge social and economic burden. This work will investigate one of the pathways that goes awry after sensory nerves are damaged. These experiments will also test whether a drug being developed to treat Alzheimer's disease is effective at blocking the persistent nerve hypersensitivity that sometimes develops after injury.
The Role Of Presynaptic Inhibition In Neuropathic Pain
Funder
National Health and Medical Research Council
Funding Amount
$466,045.00
Summary
Inhibitory nerve cells in the spinal cord are thought to play an important role in governing the interaction between painful and non-painful stimuli. Defects in this process underlie allodynia, an important symptom of neuropathic pain. We will use recent advances in genetic techniques (optogenetics) to manipulate and study how inhibitory nerve cells separate touch and pain signalling in the spinal cord of normal and neuropathic animals.
Persistent Firing In Cortical Interneurons: Mechanisms And Potential Anticonvulsant Role
Funder
National Health and Medical Research Council
Funding Amount
$520,552.00
Summary
The normal brain treads a fine line between too much electrical activity (epilepsy) and too little (sedation). We have discovered a class of brain cell that seems to behave like a sentinel, monitoring brain activity for signs of epilepsy. If a seizure occurs, this cell switches on an electrical brake that dampens excess activity. In this project we will study how this brake works and whether it really can inhibit seizures. Our research may lead to better treatments for epilepsy.
Debilitating anxiety disorders, such as post-traumatic stress disorder or panic disorder, affect 14% of adult Australians and current therapy is often ineffective. The amygdala is a brain region that is key to learning fear responses but also in reducing our fear responses. This project will determine whether the brain’s own endogenous opioids can modify the activity of the amygdala in order to provide new leads for novel pharmacotherapies with enhanced efficacy.
Mechanisms Underlying Efferent Feedback In The Vestibular System
Funder
National Health and Medical Research Council
Funding Amount
$491,475.00
Summary
The balance system has a remarkable, but poorly understood capacity for self-repair. An intrinsic feedback mechanism, the Efferent Vestibular System or EVS is thought to play a major role in this self-repair. Surprisingly, we know little about EVS function in animals or humans. We will study the EVS in mice and humans to gain a better understanding of how it works. This information will then drive the design of therapies that improve and restore balance in disease, injury, or ageing.
Chronic pain is a debilitating syndrome caused by damage to tissue and the nervous system, arising from trauma and disease. It is poorly served by current drugs. To identify novel more effective therapies we propose to examine the mechanisms underlying this syndrome. We have identified a novel protein which is involved in synaptic plasticity. We will examine its role the development of chronic pain at the cellular level and how it might be exploited for the treatment of chronic pain.
Neural Circuits For Odour-processing In The Rodent Piriform Cortex 'in Vivo'
Funder
National Health and Medical Research Council
Funding Amount
$488,817.00
Summary
We are studying the brain circuits that enable mammals to recognise odours. We will apply puffs of odorants to the nose of an anaesthetised mouse while measuring electrical signals in the odour-processing region of its cerebral cortex. Our work will answer fundamental questions about how the brain interprets sensory inputs in order to build a coherent picture of the world. This is basic research that will, in the longer term, shed light on the disturbances that occur during mental illness.