Mechanisms And Pathways Leading To Saccadic Suppression In Primate Brain
Funder
National Health and Medical Research Council
Funding Amount
$858,086.00
Summary
Only the central few degrees of the visual field are viewed in high resolution. Consequently, the eyes must be pointed at targets of interest using saccadic eye movements. Each saccade generates potentially disturbing image motion but this is never perceived: saccadic suppression. This project aims to characterise the neural basis of saccadic suppression using modern techniques. As a result, a prime question in Neuroscience for over 100 years can now be answered.
Visuomotor Integration In The Medial Parietal Cortical Areas
Funder
National Health and Medical Research Council
Funding Amount
$665,163.00
Summary
This project will find out how the electrical activity of brain cells is used to direct the arms to a specific position in the space around a person's body. By understanding the code used by brain cells to perform this control of the arms, we will be able to "read" the brain activity directly, and use it to allow control of artificial arms by people who have been paralysed or had amputations.
Understanding The Organisation Of The Medial Parietal Cortex: Sensorimotor Integration For Goal-directed Behaviour
Funder
National Health and Medical Research Council
Funding Amount
$551,862.00
Summary
Reaching and grasping are of obvious significance for a productive life, and many of the brain areas known to be involved in the direction of arm movements are located in the parietal lobe. Stroke affecting this part of the brain causes disability, as people become unable to reach accurately, or to close their hands around objects with appropriate strength. This project will combine modern physiological and anatomical methods to reveal the brain circuitry responsible for such crucial skills.
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.
Early Development, MicroRNAs, Dendritogenesis And Cognition
Funder
National Health and Medical Research Council
Funding Amount
$313,557.00
Summary
Neurodevelopmental disorders are characterised by a marked disruption of learning and memory, which is reflected by structural changes in the brains of affected individuals. However, little is known about the underlying mechanisms of this pathology or whether it is directly related to cognitive deficits across the lifespan. How the brain is wired during early development and its relationship to learning and memory in adulthood will therefore be determined.
Rapid Plasticity In Sensory Systems - Linking Neuronal Adaptation And Perception
Funder
National Health and Medical Research Council
Funding Amount
$650,810.00
Summary
The activity of individual sensory neurons in the brain is surprisingly variable and continuously changing. It is unclear how reliable perception of the world can be generated from the activity of “noisy” neurons, and it remains unclear why neuronal sensitivity should change in the first place! This project will give insights into how groups of sensory neurons collectively overcome their intrinsic variability to support reliable visual perception.
Context Is Everything – Understanding How Spatial, Temporal And Behavioural Context Affect Sensory Processing
Funder
National Health and Medical Research Council
Funding Amount
$512,382.00
Summary
A possum in a tree is cute to see on a bushwalk, but scary to hear when we are trying to sleep. This illustrates that how we perceive a “target” is affected by “modulators” that are close in space or time to the target, or by the task at hand. Deficits in contextual modulation are apparent in many neurological conditions. This project will investigate the neural circuitry that mediates spatial, temporal and task-related contextual modulation.
The Pulvinar Is Instrumental In The Development Of Visual Cortical Networks
Funder
National Health and Medical Research Council
Funding Amount
$1,192,911.00
Summary
This Project will elucidate the mechanisms and brain structures involved in visual system development and how their perturbation in early life can lead to neurodevelopmental and cognitive brain disorders, such as Williams and fragile-X syndromes as well as dyslexia. Furthermore, it will demonstrate how the visual brain has a greater capacity to compensate and achieve preservation of vision following an injury in early life.
Developmental Differences In The Role Of The Medial Prefrontal Cortex In Fear Regulation
Funder
National Health and Medical Research Council
Funding Amount
$354,481.00
Summary
This project explores the neural circuitry involved in fear expression early in life, and how early life experiences can affect this circuitry. A better understanding of the neural circuitry underlying fear regulation across development is essential given that the majority of anxiety disorders first appear in childhood or early adolescence.
Disorder in the circuits that process emotional stimuli are central in the pathogenesis of anxiety disorders. In this grant we will study the circuits that are inolved in fear learnng. Our results will provide the background to developing more effective therapies for a range of anxiety related disorders such as generalised anxiety and post traumatic stress disorder.