Information Encoding By Temporal Structure Of Afferent Spike Trains
Funder
National Health and Medical Research Council
Funding Amount
$231,175.00
Summary
Our ability to sense, discriminate and interpret touch stimuli underpins some of the most crucial functions of the human hand that relate to object exploration and manipulation. The fundamental mechanism of how nerve impulses generated by tactile receptors are interpreted by the nervous system is not understood. Only by discovering the underlying neural encoding mechanisms can we appreciate the functional impairments in patients and learn to identify them before they become widespread and irreve ....Our ability to sense, discriminate and interpret touch stimuli underpins some of the most crucial functions of the human hand that relate to object exploration and manipulation. The fundamental mechanism of how nerve impulses generated by tactile receptors are interpreted by the nervous system is not understood. Only by discovering the underlying neural encoding mechanisms can we appreciate the functional impairments in patients and learn to identify them before they become widespread and irreversible.Read moreRead less
Australian Centre For Electromagnetic Bioeffects Research
Funder
National Health and Medical Research Council
Funding Amount
$2,499,672.00
Summary
Addressing the WHO Radiofrequency (RF) Research Agenda, this CRE brings together Australia’s strongest RF-health researchers to safeguard the Australian community within its ever-burgeoning RF exposure environment. It will determine the potential for RF-induced harm in the community and how best to communicate this knowledge to the community, translate this knowledge to the community via focused strategies, and develop Australia’s RF-health research and communication capability for the future.
Neuroimaging Of Human Visual Cortex Using Functional Magnetic Resonance Imaging: Improving Multivariate Techniques For Decoding Brain Activity
Funder
National Health and Medical Research Council
Funding Amount
$316,449.00
Summary
This research will investigate how the brain processes visual information using non-invasive functional magnetic resonance imaging (fMRI). The aims of this project are to advance techniques for "decoding" human brain activity from fMRI and to increase our understanding of how the brain uses visual information. Improvements in fMRI analysis will allow this cutting-edge technique to be applied more readily in clinical settings for improved treatment and diagnosis of neurological disorders.
Imaging Atlases Of The Brain Of Humans And Experimental Animals
Funder
National Health and Medical Research Council
Funding Amount
$808,375.00
Summary
This project uses imaging techniques and molecular genetics to produce the next generation of brain maps. It will advance our understanding of the organisation and structure of the brain and spinal cord of humans and experimental animals – paving the way for the development of psychotherapeutic drugs and more accurate interventions on the human brain. The new maps will help those who study the brain of patients with diseases such as Alzheimer’s or Parkinson’s or animal models of these diseases.
Neuronal Activity And Functional Magnetic Resonance Imaging (fMRI)
Funder
National Health and Medical Research Council
Funding Amount
$367,561.00
Summary
How does brain activity relate to perception and behaviour? How does functional magnetic resonance imaging (fMRI) of the brain, which measures changes in blood oxygen, relate to the activity of single cells? I will address these questions, comparing electrical measurements of single cells and functional images, and advance our understanding of the brain in health and disease.
PREMOTOR SYMPATHETIC CONTROL OF BLOOD PRESSURE DURING PSYCHOLOGICAL STRESS: HYPOTHALAMUS VERSUS MEDULLA.
Funder
National Health and Medical Research Council
Funding Amount
$153,616.00
Summary
Health and well being depend in large part on a strong and efficient autonomic nervous system. The autonomic nervous system controls blood pressure, heart rate, gastrointestinal function, immune responses and certain forms of pain. Negative emotions can have a strong impact on autonomic function. We have all experienced the sweaty hands, pounding heart and intestinal discomfort when the mail arrives and bad news is expected or when we face a deadline for which we are not prepared. This is known ....Health and well being depend in large part on a strong and efficient autonomic nervous system. The autonomic nervous system controls blood pressure, heart rate, gastrointestinal function, immune responses and certain forms of pain. Negative emotions can have a strong impact on autonomic function. We have all experienced the sweaty hands, pounding heart and intestinal discomfort when the mail arrives and bad news is expected or when we face a deadline for which we are not prepared. This is known as psychological stress and it is usually associated with anxiety. Unfortunately, it is also the most common form of stress in modern urban life. There are clear indications that when these autonomic changes become chronic they can lead to hypertension, weak immune responses and gastric ulcers. In people already suffering from cardiovascular diseases they can also precipitate cardiac and cerebrovascular accidents. Clearly, the link between psychological stress and the autonomic nervous system needs to be explored in more detail. This project looks at the organization of the neural network in the brain and spinal cord that controls these responses. It uses a simple model of psychological stress in the conscious rat and recent non invasive techniques to record blood pressure and look at neuronal activity. We think that we have identified a group of neurons that may be controlling very specifically this response. It is located in the hypothalamus. The aim of this project is to further test the role of these neurons and find out what is controlling them. They will also be compared to another group of neurons that also controls blood pressure but apparently not in relation to psychological stress. The possibility that the cardiovascular response to psychological stress might be mediated by a specific group of neurons in the brain is a very exciting finding. It could lead to new therapeutic applications for acting against the short and long term effects of stress.Read moreRead less
The Role Of The Zinc Finger Transcriptional Repressor Znf238 During Nerve Cell Maturation
Funder
National Health and Medical Research Council
Funding Amount
$394,264.00
Summary
Proper foetal brain assembly is critical for brain function, but the underlying genetic mechanisms remain poorly defined. In this study, I will investigate a family of proteins that “turn on” neural gene expression in combination with another protein that “turns off” their expression during nerve cell development. Understanding this novel on/off mechanism for controlling gene expression in newborn nerve cells will further our understanding of how the brain is assembled.
Discovering Molecules And Mechanisms Regulating Dendrite Formation
Funder
National Health and Medical Research Council
Funding Amount
$517,989.00
Summary
Dendrites are neuronal projections necessary to receive stimuli from other neurons or the external environment. Abnormalities in dendrite development associate with mental retardation and other human conditions such as Down syndrome, Rett syndrome and Fragile-X syndrome. The studies presented in this proposal, using the powerful genetic and molecular tools available for the nematode C. elegans, will provide new insight into the cellular and molecular mechanisms regulating dendrite development.
Nerve cells have unique properties like their ability to put out axons that reach long distances from the cell body (differentiation), their ability to make contacts with other cells and initiate communication by the release of neurotransmitters from synaptic vesicles inside nerve endings (exocytosis) and the recycling of those synaptic vesicles (endocytosis). These events are mainly controlled by a large number of synapse-specific proteins, and partly regulated by a signalling molecule, cGMP, w ....Nerve cells have unique properties like their ability to put out axons that reach long distances from the cell body (differentiation), their ability to make contacts with other cells and initiate communication by the release of neurotransmitters from synaptic vesicles inside nerve endings (exocytosis) and the recycling of those synaptic vesicles (endocytosis). These events are mainly controlled by a large number of synapse-specific proteins, and partly regulated by a signalling molecule, cGMP, which mainly stimulates the enzyme PKG. In previous studies supported by the NHMRC we identified many proteins that are phosphorylated and activated by PKG. One of them, septin 3, is the focus of this proposal. We initially cloned septin 3 as a new member of a family of 10 genes that are essential for cell division. Some septins assemble as filaments that allow the two new daughter cells to finally separate. When the filament formation is perturbed certain septins end up in microscopic clumps that are found in the post-mortem brains of people affected by Alzheimer's disease, suggesting they might contribute to the disease. However, septin 3 is unlike most septins because it is a brain-specific septin, which we found in neurons and found to be highly concentrated in nerve terminals, locations not normally associated with cell division. The only other known brain-specific septin, CDCrel-1, regulates the protein machinery of exocytosis. We will examine the hypothesis that G-septin is also a regulator of synaptic vesicle endocytosis. We will determine whether septin represents a convergence point for cGMP signalling to control endocytosis. A better understanding of septin 3 and endocytosis is crucial to understanding brain disorders and ultimately developing better therapies.Read moreRead less