Neural Circuits For Active Vision In The Primate Cerebral Cortex
Funder
National Health and Medical Research Council
Funding Amount
$632,938.00
Summary
This project will try to understand how we use visual information to identify objects by their shape and motion, in natural situations in which the eyes are moving all the time. This will be accomplished by recording the electrical activity of brain cells while a trained animal is performing different types of tasks, such as tracking a moving object or exploring a scene with its eyes.
Neural Circuits For Residual Vision After Damage To Striate Cortex
Funder
National Health and Medical Research Council
Funding Amount
$662,220.00
Summary
Brain cells have the ability to rearrange their connections to create alternate pathways, which compensate for loss of function following brain damage. To understand why some people become blind after damage to the visual cortex, and some don't, we will determine how neural connections change following lesions in different stages of life. The project will provide important information that may allow future development of treatments for blindness due to stroke or traumatic brain injury.
Brain Pathways Serving Conscious And Sub-conscious Vision
Funder
National Health and Medical Research Council
Funding Amount
$571,444.00
Summary
In humans and other primates the visual system comprises evolutionary new pathways (called magnocellular or M, and parvocellular or P) superimposed on evolutionary old pathways (called koniocellular or K). These parallel pathways carry visual information from the retina, through a brain centre in the thalamus called lateral geniculate nucleus (LGN), to the cerebral neocortex. Our aim is to study the role of the K pathway in visual processing.
Functional Connectivity Between Visual Cortical Areas In The Non-human Primate
Funder
National Health and Medical Research Council
Funding Amount
$387,585.00
Summary
Visual information going from the eyes to the brain is processed in different parts of the brain to extract useful information. However, to be able to select what is important from among the vast number of objects in the scene, top-down signals from higher areas need to act on incoming signals in earlier areas. This project aims to identify what sort of neural pathways are involved in this and how it is done at the cellular level.
The superior colliculus is a brain centre which uses visual information from the eyes and other sensory information, such as sound, to direct the head and eyes towards objects of interest. This project will use current advancements in optogenetics to activate connections to this brain region in order to understand its role in coordinating head and eye movements. This will advance our understanding of how the brain collects and processes visual information to subserve behavioural functions.
The human brain has many subdivisions (�areas�) that are dedicated to vision, but in many cases their functions remain unclear. This project will study an area located deep in the brain, about which very little is known, and which appears to be affected from early stages in conditions such as Alzheimer�s disease. By understanding the patterns of electrical activity of cells in this region, and their connections with other brain areas, we hope to decipher their contribution to sensory cognition.
Investigating Trans-synaptic Degeneration In The Human Visual Pathway
Funder
National Health and Medical Research Council
Funding Amount
$79,514.00
Summary
This research project investigates the spread of neuronal damage along the visual pathway from the retina to higher order areas including the visual cortex and inter-hemispheric tracts. This trans-synaptic degeneration will be examined in Leber's optic atrophy, optic neuritis and glaucoma.
Innate Threat Detection Circuits In The Superior Colliculus Co-ordinate Respiratory And Cardiovascular Responses To Visual Stimuli
Funder
National Health and Medical Research Council
Funding Amount
$517,958.00
Summary
Our surroundings affect our bodies: light pollution, traffic, and aircraft noise all significantly affect cardiovascular health. This project will investigate interactions between brain systems that subconsciously scan our surroundings for interesting or threatening features, and those that co-ordinate the cardiovascular and respiratory systems. We will generate new knowledge that describes how the brain detects danger and translates this into signals that contribute to cardiovascular risk.
Glaucoma Causes Secondary Neurodegeneration In The Brain
Funder
National Health and Medical Research Council
Funding Amount
$380,891.00
Summary
Glaucoma is one of the commonest causes of irreversible blindness worldwide. The optic nerve have been considered as the primary site of glaucomatous damage. However, recent evidence suggests that glaucoma may not merely be an eye disease, because secondary changes have also been observed in the higher visual centres in glaucoma patients. In this proposed study, topographically related degeneration along the visual pathway will be monitored using advanced MRI technology.