Resurgent Sodium Currents in Peripheral Nerve Axons and Sensory Neurones. This project seeks evidence that unusual gating of sodium channels contributes to the hyperexcitability that results in spontaneous impulse activity in sensory axons. It asks whether axons normally behave as if they have this gating mode, whether it can be induced, whether any such behaviour is more prominent with sensory axons than motor, and whether the current can be measured directly in sensory neurones. The project is ....Resurgent Sodium Currents in Peripheral Nerve Axons and Sensory Neurones. This project seeks evidence that unusual gating of sodium channels contributes to the hyperexcitability that results in spontaneous impulse activity in sensory axons. It asks whether axons normally behave as if they have this gating mode, whether it can be induced, whether any such behaviour is more prominent with sensory axons than motor, and whether the current can be measured directly in sensory neurones. The project is the first to involve correlation of patch-clamp recordings with the behaviour of intact axons. Its outcomes will affect thought about sodium channel behaviour and may alter approaches to disorders of axonal excitability.Read moreRead less
Calcium Signalling and Sequestration at Vertebrate Motor-Nerve Terminals. A fundamental process at Synapses is the release of transmitter from nerve terminals due to the initiation of calcium signalling in the temrinals by impulses. This calcium signalling must be terminated by sequestering processes. The aim of this project is to identify these processes in a vertebrate motor-nerve terminal and to determine the means by which calcium signals the changes in efficacy of transmitter release during ....Calcium Signalling and Sequestration at Vertebrate Motor-Nerve Terminals. A fundamental process at Synapses is the release of transmitter from nerve terminals due to the initiation of calcium signalling in the temrinals by impulses. This calcium signalling must be terminated by sequestering processes. The aim of this project is to identify these processes in a vertebrate motor-nerve terminal and to determine the means by which calcium signals the changes in efficacy of transmitter release during trains of impulses. This work will give a complete description of calcium signalling in a vertebrate nerve terminal and provide the basis for ameliorating failures in transmission from nerve to muscle.Read moreRead less
The role of omega-3 fatty acids in brain mechanisms that regulate water and salt balance. The ability of mammals to survive is heavily dependent upon their ability to maintain body fluid balance. This project aims to elucidate brain mechanisms for the behavioural regulation of water and salt balance, with specific investigation of the role of dietary fatty acids within these processes. It is hypothesised that omega-3 polyunsaturated fatty acids (PUFA) affect intake of water and salt by affecti ....The role of omega-3 fatty acids in brain mechanisms that regulate water and salt balance. The ability of mammals to survive is heavily dependent upon their ability to maintain body fluid balance. This project aims to elucidate brain mechanisms for the behavioural regulation of water and salt balance, with specific investigation of the role of dietary fatty acids within these processes. It is hypothesised that omega-3 polyunsaturated fatty acids (PUFA) affect intake of water and salt by affecting the sensitivity of various receptors, or the hormones used by this body system. Omega-3 PUFA are known to play a role in regulating genes, and therefore, may also affect the production of key proteins, such as receptors, hormones or enzymes involved in the regulation of salt and water intake.Read moreRead less