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Gene therapy to enhance auditory prosthesis performance for cochlear implants. The cochlear implant is the most effective neural prosthesis, restoring hearing to the deaf. The research aims to develop a new type of implant compatible with delivery of therapeutic genes to the cells lining the cochlea. Gene therapy DNA constructs will be developed that will enhance neural survival and growth, improving cochlear implant performance. The research will provide advances in understanding how to tran ....Gene therapy to enhance auditory prosthesis performance for cochlear implants. The cochlear implant is the most effective neural prosthesis, restoring hearing to the deaf. The research aims to develop a new type of implant compatible with delivery of therapeutic genes to the cells lining the cochlea. Gene therapy DNA constructs will be developed that will enhance neural survival and growth, improving cochlear implant performance. The research will provide advances in understanding how to transfer genes into cochlear tissue, as well as development of gene cassettes for effective neural repair. The work will advance the field of bionics, an area where Australia is establishing international preeminence.Read moreRead less
Audio-visual Information for Speech-hand Gestures. How does audio-visual information influence human movement and communication? We will investigate whether speech and hand gestures involve shared information about the timing of rhythmic movements. Using dynamical systems theory and brain imaging techniques, we will study rhythms that emerge during simultaneous speaking and finger tapping in both stutterers and non-stutterers, and in left-handers and right-handers. The communicative interaction ....Audio-visual Information for Speech-hand Gestures. How does audio-visual information influence human movement and communication? We will investigate whether speech and hand gestures involve shared information about the timing of rhythmic movements. Using dynamical systems theory and brain imaging techniques, we will study rhythms that emerge during simultaneous speaking and finger tapping in both stutterers and non-stutterers, and in left-handers and right-handers. The communicative interaction of two persons performing speech-hand gestures will be examined. Results will clarify how brain asymmetry affects gestural coordination in stutterers, how stuttering can be treated, and the hypothesis that speech and language evolved from a communication system based on hand gestures.
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How critical is the inflammatory response in senile plaque formation in a mutant APP transgenic mouse model? The aims of this project is to examine the brains of mice genetically engineered to produce a human mutant form of insoluble beta amyloid protein known to play a critical role in the development of Alzheimer's disease (AD). If the "trigger" for AD is an inflammatory reaction, then the relevant examination of the early stages of senile plaque formation in these animals could lead to pharma ....How critical is the inflammatory response in senile plaque formation in a mutant APP transgenic mouse model? The aims of this project is to examine the brains of mice genetically engineered to produce a human mutant form of insoluble beta amyloid protein known to play a critical role in the development of Alzheimer's disease (AD). If the "trigger" for AD is an inflammatory reaction, then the relevant examination of the early stages of senile plaque formation in these animals could lead to pharmaceutical intervention to delay the development of this debilitating disease. A 5 year delay would significantly reduce the number of people with AD, not only adding years of improved quality of life, but also saving hundreds of millions of Australian dollars in health costs.Read moreRead less
Microparticles as effectors of microvascular alterations in brain inflammation. Cerebral malaria (CM) kills many children worldwide, but we do not understand why their small blood vessels in the brain become obstructed. We found that tiny elements detached from cell membranes, called microparticles (MP), are dramatically elevated in the blood during CM. Our results strongly suggest that these MP are important in CM development. We have found that some drugs block the release of MP and the stick ....Microparticles as effectors of microvascular alterations in brain inflammation. Cerebral malaria (CM) kills many children worldwide, but we do not understand why their small blood vessels in the brain become obstructed. We found that tiny elements detached from cell membranes, called microparticles (MP), are dramatically elevated in the blood during CM. Our results strongly suggest that these MP are important in CM development. We have found that some drugs block the release of MP and the stickiness of malaria parasites to blood vessels. Our project will tackle the conditions of MP production and define new drugs to prevent it. It also will explain how the brain becomes affected by high numbers of MP. Our results will cast new light on why the brain functions abnormally when its blood vessels become modified.Read moreRead less
Relationship of the functional architecture of the mammalian brain to its microcircuitry. The project seeks to understand a very fundamental issue in neuroscience: how the connectivity and architecture of the cortex are related to the functions of neurones in that area? This will be investigated by imaging the surface of the visual cortex of anaesthetised cats and monkeys as special visual patterns are shown to the eye/s. The overall picture gained of the active and inactive cortical areas will ....Relationship of the functional architecture of the mammalian brain to its microcircuitry. The project seeks to understand a very fundamental issue in neuroscience: how the connectivity and architecture of the cortex are related to the functions of neurones in that area? This will be investigated by imaging the surface of the visual cortex of anaesthetised cats and monkeys as special visual patterns are shown to the eye/s. The overall picture gained of the active and inactive cortical areas will be related to the properties of neurones in those areas and to those of individual input and output fibres. An optical imaging equipment will be acquired in 2004 using a recently awarded LIEF grant to the CI.Read moreRead less
Functional Electronic Stimulation of Muscles - Development of a Model for Sensory Feedback to Amputees and Vision for the Blind. Electrical stimulation of nerve fibres is an emerging physiological technique with great promise towards rehabilitation. The field lacks techniques for detailed, focal application of stimuli to recruit specific fibres for fine muscle control or conveying useful neurosensory information. The investigator has developed microtechnology for delivering stimuli to 100 sites, ....Functional Electronic Stimulation of Muscles - Development of a Model for Sensory Feedback to Amputees and Vision for the Blind. Electrical stimulation of nerve fibres is an emerging physiological technique with great promise towards rehabilitation. The field lacks techniques for detailed, focal application of stimuli to recruit specific fibres for fine muscle control or conveying useful neurosensory information. The investigator has developed microtechnology for delivering stimuli to 100 sites, conceivably facilitating recruitment of specific fibres within a given bundle. Effects of muscle stimulation are readily measured and shall be used to model and refine techniques for generic high-resolution fibre recruitment. Benefits include, improved muscle control in functional electrical stimulation, sensory perception for amputees and patterned vision from optic nerve stimulation.Read moreRead less
Large-scale Parallelization of Neural Stimulation in a Visual Prosthesis. Over time, engineers have been able to treat a large number of disorders through new technologies. For example, the deaf can now hear again through cochlear implants. Similar efforts to provide vision to the blind, however, have met with difficulties owing to the high quantities of sites that must be stimulated to provide 'useful' vision. This study addresses the important issues relating to the delivery of large quantitie ....Large-scale Parallelization of Neural Stimulation in a Visual Prosthesis. Over time, engineers have been able to treat a large number of disorders through new technologies. For example, the deaf can now hear again through cochlear implants. Similar efforts to provide vision to the blind, however, have met with difficulties owing to the high quantities of sites that must be stimulated to provide 'useful' vision. This study addresses the important issues relating to the delivery of large quantities of electrical stimulations to surviving nerves in the eyes of blind patients in an effort to devise a beneficial visual prosthesis or 'bionic eye'. The outcomes of this study could substantially enhance Australia's already prominent reputation in neurostimulation and provide much needed treatments to vision disorders.Read moreRead less
Synaptic and network properties underlying neural coding in the mammalian visual cortex. This study will:
(1) Increase our basic understanding of visual function that can help to explain many clinical perceptual disturbances. (2) Help in providing a detailed picture of intracortical neuronal networks that can form the basis for a prosthesis for the blind. (3) Discover the principles of neural organization underlying functions such as figure-ground segregation and perceptual learning which can i ....Synaptic and network properties underlying neural coding in the mammalian visual cortex. This study will:
(1) Increase our basic understanding of visual function that can help to explain many clinical perceptual disturbances. (2) Help in providing a detailed picture of intracortical neuronal networks that can form the basis for a prosthesis for the blind. (3) Discover the principles of neural organization underlying functions such as figure-ground segregation and perceptual learning which can inspire practical algorithms for robotic vision. (4) Train graduate students and postdoctoral fellows in state of the art techniques in a stimulating intellectual environment.Read moreRead less
Thalamo-cortical organisation in visual information processing. This study will: (1) Increase our basic understanding of visual function that can help to explain many clinical perceptual disturbances. (2) Help in providing a detailed picture of intracortical neuronal networks that can form the basis for a prosthesis for the blind. (3) Discover the principles of neural organization underlying functions such as figure-ground segregation and perceptual learning which can inspire practical algorithm ....Thalamo-cortical organisation in visual information processing. This study will: (1) Increase our basic understanding of visual function that can help to explain many clinical perceptual disturbances. (2) Help in providing a detailed picture of intracortical neuronal networks that can form the basis for a prosthesis for the blind. (3) Discover the principles of neural organization underlying functions such as figure-ground segregation and perceptual learning which can inspire practical algorithms for robotic vision. (4) Train graduate students and postdoctoral fellows in state of the art techniques in a stimulating intellectual environmentRead moreRead less
Improved identification of patients 'at risk' of depression, and optimal targeting of rehabilitation post-stroke through novel brain imaging and biomarkers. Use of novel brain imaging and biomarkers for identification of stroke survivors at risk of depression and recurrent stroke will permit early access to preventative and effective treatments for depression and improve capacity to benefit from rehabilitation. Development of predictive models to guide selection of most optimal rehabilitation st ....Improved identification of patients 'at risk' of depression, and optimal targeting of rehabilitation post-stroke through novel brain imaging and biomarkers. Use of novel brain imaging and biomarkers for identification of stroke survivors at risk of depression and recurrent stroke will permit early access to preventative and effective treatments for depression and improve capacity to benefit from rehabilitation. Development of predictive models to guide selection of most optimal rehabilitation strategies based on viable brain will maximise the capacity for persons with stroke to reach their full potential for recovery and ensure rehabilitation is more targeted and cost efficient. Improved capacity to benefit from treatment will have ongoing benefits for activity participation and productive living in Australians who experience stroke.Read moreRead less