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The jugular vagal sensory connectome regulating visceral function. Internal body organs have a rich supply of sensory nerve fibres that serve important roles in monitoring the local environment for normal and abnormal sensory stimuli. These nerve fibres have different origins and wire into brain circuits that regulate widely diverse physiological responses. In this study we aim to study the neural circuits and responses mediated by a group of these sensory nerves which has not been investigated ....The jugular vagal sensory connectome regulating visceral function. Internal body organs have a rich supply of sensory nerve fibres that serve important roles in monitoring the local environment for normal and abnormal sensory stimuli. These nerve fibres have different origins and wire into brain circuits that regulate widely diverse physiological responses. In this study we aim to study the neural circuits and responses mediated by a group of these sensory nerves which has not been investigated appreciably in the past. We believe that these sensory neural circuits will reveal important new insights into how internal organs perform their diverse and essential functions to sustain life.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE230101079
Funder
Australian Research Council
Funding Amount
$453,528.00
Summary
New insights into how the brain interprets visceral and somatic sensations. Sensory nerve fibres monitor normal and abnormal stimuli in our body tissues, sending this information to the brain. I study the sensory pathways of the respiratory system which protect the lungs from harmful stimuli, such as inhaled pollutants or smoke. I discovered that respiratory sensory pathways interact with sensory circuits in the brain arising from other body tissues. The goal of this project is to investigate on ....New insights into how the brain interprets visceral and somatic sensations. Sensory nerve fibres monitor normal and abnormal stimuli in our body tissues, sending this information to the brain. I study the sensory pathways of the respiratory system which protect the lungs from harmful stimuli, such as inhaled pollutants or smoke. I discovered that respiratory sensory pathways interact with sensory circuits in the brain arising from other body tissues. The goal of this project is to investigate one example of this interaction; the convergence of visceral and somatic sensory pathways onto a brain circuit that regulates the intensity of the sensations that are experienced. This project addresses the fundamental question of how the brain processes two competing noxious sensations.Read moreRead less
Understanding multiday cycles underpinning human physiology. We recently discovered long-term rhythms modulating activities of our brains and hearts ranging in duration from 3-60 days. The cause of these longer, ‘multiday cycles’ remain unknown. This project aims to understand; causes of multiday cycles (measuring the nervous and autonomic nervous system), their effects (on cognition, sleep, and stress), and quantify the relationship between coupled cyclical systems. The research outcomes can pr ....Understanding multiday cycles underpinning human physiology. We recently discovered long-term rhythms modulating activities of our brains and hearts ranging in duration from 3-60 days. The cause of these longer, ‘multiday cycles’ remain unknown. This project aims to understand; causes of multiday cycles (measuring the nervous and autonomic nervous system), their effects (on cognition, sleep, and stress), and quantify the relationship between coupled cyclical systems. The research outcomes can provide fundamental new knowledge about cyclic dynamics governing human physiology, leading to improved rigour in life sciences research. Commercial outcomes include technology to optimise individual productivity, learning, health, and wellbeing based on physiological cycles, with diverse benefits to society.Read moreRead less
Old brain cells perform new tricks to allow life-long learning. In the brain, nerve cells transmit electrical signals more quickly and reliably when they are insulated. The insulating cells undergo small adaptive changes that speed up information transfer during learning, and the faster the electrical signal, the better the learning outcomes. This project aims to understand the signals that direct insulating cells to adapt and support life-long learning. In the longer term, this knowledge may be ....Old brain cells perform new tricks to allow life-long learning. In the brain, nerve cells transmit electrical signals more quickly and reliably when they are insulated. The insulating cells undergo small adaptive changes that speed up information transfer during learning, and the faster the electrical signal, the better the learning outcomes. This project aims to understand the signals that direct insulating cells to adapt and support life-long learning. In the longer term, this knowledge may be used to: develop interventions that improve learning and educational outcomes; counteract age-related memory decline and enable longer work force participation; develop strategies to circumvent the memory loss caused by brain diseases, or improve the design of computer hardware.Read moreRead less
Molecular control of adult neural stem cell quiescence. The objective of this project is to improve our understanding of adult neural stem cell biology and function. Within the central nervous system of the brain, neural stem cells persist throughout adult life. These cells continually produce new neurons that are pivotal for processes including learning and memory, and deficits in adult neurogenesis have been linked to age-related cognitive decline. Adult neural stem cells are predominantly qui ....Molecular control of adult neural stem cell quiescence. The objective of this project is to improve our understanding of adult neural stem cell biology and function. Within the central nervous system of the brain, neural stem cells persist throughout adult life. These cells continually produce new neurons that are pivotal for processes including learning and memory, and deficits in adult neurogenesis have been linked to age-related cognitive decline. Adult neural stem cells are predominantly quiescent, dividing rarely to ensure that they are not prematurely exhausted. However, the factors that maintain this quiescence are very poorly defined. The project aims to understand how stem cell quiescence is controlled at both a molecular and cellular level in vivo within the adult mouse brain.Read moreRead less
Transcriptional regulation of brain size during development. This project aims to understand the fundamental mechanisms through which intermediate progenitor cell (IPC) formation is regulated within the cerebral cortex. The cerebral cortex plays a key role in functions central to our existence, including emotion, behaviour, learning and memory. During development, cortical neural stem cells produce neurons via IPCs. This project expects to discover the genetic programs regulating neuronal produc ....Transcriptional regulation of brain size during development. This project aims to understand the fundamental mechanisms through which intermediate progenitor cell (IPC) formation is regulated within the cerebral cortex. The cerebral cortex plays a key role in functions central to our existence, including emotion, behaviour, learning and memory. During development, cortical neural stem cells produce neurons via IPCs. This project expects to discover the genetic programs regulating neuronal production, providing significant conceptual advances in this key field. This will provide significant benefits, such as enhancing our understanding of how overall brain size is regulated during development.Read moreRead less
Mapping sites of visceral convergence connecting the colon and bladder. This project aims to develop multiple neuroanatomical approaches to identify where in the central nervous system the sensory signalling from the colon and bladder merge. The combination of such technologies is novel to the study of the central circuits relaying colon/bladder convergence into the brain and will generate new and detailed knowledge of the central pathways in which pelvic organ sensory (discomfort) and motor (de ....Mapping sites of visceral convergence connecting the colon and bladder. This project aims to develop multiple neuroanatomical approaches to identify where in the central nervous system the sensory signalling from the colon and bladder merge. The combination of such technologies is novel to the study of the central circuits relaying colon/bladder convergence into the brain and will generate new and detailed knowledge of the central pathways in which pelvic organ sensory (discomfort) and motor (defecation/urination) functions are coordinated. The expected outcomes are predicted to aid future discovery of mechanisms of cross-organ sensitisation and are anticipated to provide significant benefit to therapy development for chronic visceral pain syndromes associated with bowel and bladder dysfunction.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150101578
Funder
Australian Research Council
Funding Amount
$372,000.00
Summary
How does neurogenesis in the adult hippocampus influence learning & memory? One of the primary brain structures critical for learning and memory in animals and humans is the hippocampus, where regulated production of new neurons throughout life (i.e. adult neurogenesis) underpins these cognitive functions. The project aims to unravel how adult-born neurons exert their influence over behaviour by determining when newly born neurons become critical for behaviour and the connections made by these c ....How does neurogenesis in the adult hippocampus influence learning & memory? One of the primary brain structures critical for learning and memory in animals and humans is the hippocampus, where regulated production of new neurons throughout life (i.e. adult neurogenesis) underpins these cognitive functions. The project aims to unravel how adult-born neurons exert their influence over behaviour by determining when newly born neurons become critical for behaviour and the connections made by these cells within the hippocampal network. It aims to provide fundamental new insight into the stages at which these neurons are important for the acquisition of spatial task versus the recall of spatial tasks.Read moreRead less
Neural circuits that mediate fear conditioning and extinction. Understanding of how the brain processes, stores and retrieves information and produces behavioural outcomes is in its infancy. This project will use electrophysiology and molecular techniques to understand the circuits that mediate one form of emotional learning.
Ultradian rhythms in basal metabolism; relationship to thermoregulation, cardiovascular function and behavioural arousal. Results from this project will be of basic theoretical biological importance, and may well provide a foundation for understanding basal metabolic regulation and its link with cardiovascular function. Our findings may provide a new foundation for discovering strategies that alter basal metabolic rate in a manner that improves health and reduces the incidence of obesity related ....Ultradian rhythms in basal metabolism; relationship to thermoregulation, cardiovascular function and behavioural arousal. Results from this project will be of basic theoretical biological importance, and may well provide a foundation for understanding basal metabolic regulation and its link with cardiovascular function. Our findings may provide a new foundation for discovering strategies that alter basal metabolic rate in a manner that improves health and reduces the incidence of obesity related disease such as heart attack and stroke. Thus this research proposal is of special relevance to National Research Priority 2: Promoting and Maintaining Good Health. Obesity and obesity-related medical conditions particularly affect older people, so that our research is also highly relevant to National Research Priority 2 sub-areas: Ageing well, Ageing productively.Read moreRead less