Neural circuit control of effort under stress . This Project aims to investigate how the ‘decision’ to persist in exerting effort to obtain a reward is encoded in the the brain and affected by stress. This work will generate new knowledge on the neural mechanisms through which stress modifies neural activity to control decision making processes underpinning adaptive behaviours essential for survival. The expected outcomes of this work include enhanced capacity at the interface of behavioural a ....Neural circuit control of effort under stress . This Project aims to investigate how the ‘decision’ to persist in exerting effort to obtain a reward is encoded in the the brain and affected by stress. This work will generate new knowledge on the neural mechanisms through which stress modifies neural activity to control decision making processes underpinning adaptive behaviours essential for survival. The expected outcomes of this work include enhanced capacity at the interface of behavioural and computational neuroscience, that will in turn provide significant benefits through greater insight into brain functions essential for survival, with long ranging implications for performance optimisation and brain-inspired computing. Read moreRead less
Midbrain hunger signalling modifies decision making under conflict. Decision-making is one of the most important and fundamental biological processes executed by the mammalian brain. Environmental threats and physiological pressures, such as hunger, can influence decision-making processes skewing the risk/reward ratio, yet how the brain integrates these conflicting goals to determine action selection is unknown. This project aims to investigate brain chemistry and circuitry controlling decision ....Midbrain hunger signalling modifies decision making under conflict. Decision-making is one of the most important and fundamental biological processes executed by the mammalian brain. Environmental threats and physiological pressures, such as hunger, can influence decision-making processes skewing the risk/reward ratio, yet how the brain integrates these conflicting goals to determine action selection is unknown. This project aims to investigate brain chemistry and circuitry controlling decision making under conflict using a multidisciplinary approach combining behaviour, pharmacogenetics, and sophisticated molecular and functional profiling. The expected outcomes will advance theories regarding the neural organisation and computation of decision making under conflict.Read moreRead less
The impact of circadian and sleep factors on neurodevelopment. This project aims to longitudinally examine the contributions of multiple circadian and sleep factors on the development of the teen brain. Adolescence is associated with a change in the internal body clock, leading to later bed and wake times and loss of sleep. It is also a time when the teenage brain is rapidly maturing to support learning. Despite the known importance of sleep in adolescence we know little about how the circadian ....The impact of circadian and sleep factors on neurodevelopment. This project aims to longitudinally examine the contributions of multiple circadian and sleep factors on the development of the teen brain. Adolescence is associated with a change in the internal body clock, leading to later bed and wake times and loss of sleep. It is also a time when the teenage brain is rapidly maturing to support learning. Despite the known importance of sleep in adolescence we know little about how the circadian clock and sleep impacts the developing brain. Our project expects to advance understanding of the importance of sleep and circadian timing for healthy brain and cognitive development. This knowledge will inform policy and prevention/intervention programs to benefit individuals, parents and the community.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE240100614
Funder
Australian Research Council
Funding Amount
$443,007.00
Summary
How does the brain process conflicting information? Learning is the means by which we adapt to our environments. Occasionally, what we learn contradicts our present knowledge about the world. When this occurs, the old and new (contradictory) information compete for control over behaviour. Yet, how the brain processes contradictory information and resolves this competition is poorly understood. This project uses modern genetic tools in rodents to examine how the brain encodes and retrieves contra ....How does the brain process conflicting information? Learning is the means by which we adapt to our environments. Occasionally, what we learn contradicts our present knowledge about the world. When this occurs, the old and new (contradictory) information compete for control over behaviour. Yet, how the brain processes contradictory information and resolves this competition is poorly understood. This project uses modern genetic tools in rodents to examine how the brain encodes and retrieves contradictory information to influence behaviour. The outcomes include new insights regarding the neural basis of adaptive behaviour; and the benefits include an understanding of why we sometimes fail to adapt to change, and disorders characterized by such failures (e.g., anxiety disorders, addiction).Read moreRead less
Uncovering a novel memory process mediating stimulus-based decisions. The project aims to describe how environmental stimuli influence choice between actions. The goal is to demonstrate that this influence recruits a novel form of memory characterised by a durable change in the expression of an opioid receptor. It will combine sophisticated behavioural tasks with modern genetic tools in rodents to identify the molecular, cellular and neural interactions underlying the acquisition, maintenance an ....Uncovering a novel memory process mediating stimulus-based decisions. The project aims to describe how environmental stimuli influence choice between actions. The goal is to demonstrate that this influence recruits a novel form of memory characterised by a durable change in the expression of an opioid receptor. It will combine sophisticated behavioural tasks with modern genetic tools in rodents to identify the molecular, cellular and neural interactions underlying the acquisition, maintenance and retrieval of this memory. The project expects to provide new insights into the brain machinery promoting motivated behaviours and adaptive decision-making, and to extend knowledge about the physiological underpinnings of our memories. Read moreRead less
Gut-brain control of cue-induced feeding behaviours. This proposal aims to determine how food cues (e.g., advertisements) trigger our desire to eat. Using modern virally-mediated strategies, behavioural and histological techniques in a transgenic rat, this proposal seeks to characterise novel gut-brain circuits that mediate cue-induced feeding behaviours. This is significant as food cues can cause overeating, which is problematic in the current obesogenic society, yet the mechanisms are unclear. ....Gut-brain control of cue-induced feeding behaviours. This proposal aims to determine how food cues (e.g., advertisements) trigger our desire to eat. Using modern virally-mediated strategies, behavioural and histological techniques in a transgenic rat, this proposal seeks to characterise novel gut-brain circuits that mediate cue-induced feeding behaviours. This is significant as food cues can cause overeating, which is problematic in the current obesogenic society, yet the mechanisms are unclear. This project expects to provide new knowledge on how the gut communicates with multiple brain regions to control cue-induced eating. This work should benefit the advancement of knowledge and establish a framework for future research on gut-brain mechanisms in cue-induced feeding.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE230101025
Funder
Australian Research Council
Funding Amount
$456,106.00
Summary
Food for thought: identifying dietary influences on decision making. Cues that signal food are abundant in the surrounding environment, yet their ability to stimulate food consumption remains poorly understood. This project seeks to identify how food cues influence decision-making processes in the presence of food cues. It will also test how dietary habits alter responding to food cues, and explore the underlying neural mechanisms of these effects. Sophisticated behavioural neuroscience techniqu ....Food for thought: identifying dietary influences on decision making. Cues that signal food are abundant in the surrounding environment, yet their ability to stimulate food consumption remains poorly understood. This project seeks to identify how food cues influence decision-making processes in the presence of food cues. It will also test how dietary habits alter responding to food cues, and explore the underlying neural mechanisms of these effects. Sophisticated behavioural neuroscience techniques will be employed in a validated rodent model of the modern diet. Expected outcomes include new interdisciplinary knowledge identifying how nutritional choices influence cognition and the brain. The project should inform how the modern environment shapes dietary habits.Read moreRead less
Prefrontal dopamine in the dynamic processes of learning across lifetime. To facilitate age-specific adaptive action in a changing environment, how we learn changes not only as we grow, but also as we age. However, the neurobiological processes in these age-related changes are poorly studied. This is a significant knowledge gap that needs to be addressed to promote healthy cognitive development and ageing. This research program aims to examine the contribution of prefrontal dopamine and its rece ....Prefrontal dopamine in the dynamic processes of learning across lifetime. To facilitate age-specific adaptive action in a changing environment, how we learn changes not only as we grow, but also as we age. However, the neurobiological processes in these age-related changes are poorly studied. This is a significant knowledge gap that needs to be addressed to promote healthy cognitive development and ageing. This research program aims to examine the contribution of prefrontal dopamine and its receptors D1 and D2 in associative learning and its inhibition at 9 distinct ages spanning development to ageing in male and female rats. The outcomes will provide a new neuroscientific framework to understand learning and memory throughout life, which will foster new research opportunities and inform our education and health.Read moreRead less
Social buffering of fear inhibition in adolescent rats. Adolescence is an important time when individuals learn to manage stress-related emotions like fear. Peers can help, or hinder, individuals to regulate fear. This project aims to understand how, when, and for whom social buffering of fear regulation occurs during adolescence. It uses a behavioural, pharmacological, and neural approach to explore these issues. The project aims to close the gap in understanding of how social companions affect ....Social buffering of fear inhibition in adolescent rats. Adolescence is an important time when individuals learn to manage stress-related emotions like fear. Peers can help, or hinder, individuals to regulate fear. This project aims to understand how, when, and for whom social buffering of fear regulation occurs during adolescence. It uses a behavioural, pharmacological, and neural approach to explore these issues. The project aims to close the gap in understanding of how social companions affect basic learning and memory processes in an understudied population of adolescents. The expected outcomes of this project include a richer knowledge of how peers shape emotional regulation during development, which will ultimately inform social-based approaches for improving emotion regulation in youth.
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Subcortical control of human reaching? This project will test a radical new hypothesis about how the human brain generates visually guided behaviour. Conventional thinking assumes that visuomotor control of limb movements occurs exclusively within the cerebral cortex. However, the project team’s recent observations of extremely rapid visually guided muscle activity strongly imply that the human brain controls reaching movements via more primitive midbrain and brainstem structures. The project’s ....Subcortical control of human reaching? This project will test a radical new hypothesis about how the human brain generates visually guided behaviour. Conventional thinking assumes that visuomotor control of limb movements occurs exclusively within the cerebral cortex. However, the project team’s recent observations of extremely rapid visually guided muscle activity strongly imply that the human brain controls reaching movements via more primitive midbrain and brainstem structures. The project’s hypotheses challenge long-standing ideas about the functional organisation of the human brain and may have wide-ranging implications for the design of human-machine interfaces as well as training protocols in rehabilitation, industry, and sport.Read moreRead less