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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Excitability of somatic afferent pathways to the motor cortex during locomotion in the cat

Montgomery, Alistair Scott January 1993 (has links)
No description available.
22

ELECTROPHYSIOLOGICAL ANALYSIS OF THE RECURRENT RENSHAW CIRCUIT (MOTONEURON, INHIBITION, SPIKE-TRIGGERED AVERAGE, SPINAL CORD).

Yuan, Chun-Su January 1986 (has links)
One goal of the neurophysiological approach to the study of nervous systems is to analyze neuronal circuitry in terms of the synaptic actions of one cell on another, particularly in instances in which both cells are functionally identifiable and components of a circuit whose overall structural and functional properties can be analyzed with experimental techniques. The present project contributed to this type of effort by providing an analysis of the recurrent Renshaw circuit, a prominent pathway in the mammalian spinal cord which includes recurrent motoneuronal collaterals, Renshaw cells and other interneurons, which, in turn, project to motoneurons. The project describes the use of a relatively new data processing technique, spike-triggered averaging, to study the effects of the single impulses of single motor axons on the postsynaptic activity of single motoneurons which were responsive to the test impulses by way of components of the recurrent Renshaw circuit. The experimental paradigm involved intracellular recording from single motoneurons in low-spinal cats, either anesthetized with chloralose-urethane or unanesthetized after their ischemic decapitation. The synaptic noise recorded in each motoneuron served as the input to a signal averager which was triggered by brief electrical shocks used to activate single antidromic impulses in single motor axons, either by way of an intra-axonally positioned microelectrode in the muscle nerve or by microstimulation of the muscle supplied by the axon. The resultant average revealed the motoneuron's response to each single antidromic impulse; a recurrent inhibitory postsynaptic potential, recorded for the first-ever time in this project and termed a single-axon RIPSP. The experimental results described in the report include: first, the measurement, incidence and characterization of single-axon RIPSPs; and second, their use to test a hypothesis concerned with the distribution of Renshaw-cell effects within the spinal cord. The single-axon RIPSP measurement was shown to be the clearest example yet provided in the neurophysiological literature that spike-triggered averaging can be used to detect synaptic activity crossing two or more synapses within the central nervous system. Furthermore, the hypothesis was confirmed that Renshaw-cell effects within a single spinal motor nucleus are distributed according to the principle of topographic specificity.
23

Neural network models for texture segmentation and target detection

Schofield, Andrew John January 1993 (has links)
No description available.
24

Classification and projection strength of muscle spindle afferents

Rodgers, Justin Fraser January 1995 (has links)
No description available.
25

Responses to prolonged and repetitive stimulation of identified giant neurones in the brain of Helix aspera

Haynes, Laurence William January 1976 (has links)
No description available.
26

Studies on the spinal reflex in an isolated mammalian preparation

Kelly, M. E. M. January 1984 (has links)
No description available.
27

The functional and pharmacological organisation of neurones in lamina C of the feline dorsal lateral geniculate nucleus

Lynch, R. C. J. January 1988 (has links)
No description available.
28

Structural and functional inter-relationships of the dorsal column nuclei with other somaesthetic mechanisms in the cat

Enevoldson, T. P. January 1982 (has links)
No description available.
29

The contribution of GABA- and glycine mediated inhibition to the response properties of neurones in the inferior colliculus

Le Beau, Fiona Elizabeth Nicole January 1995 (has links)
No description available.
30

An investigation of monoaminergic mechanisms in the regulation of pupil size and the acoustic startle reflex in man

Phillips, Marc Antony January 2000 (has links)
No description available.

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