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Showing papers on "Cuneate nucleus published in 1982"



Journal ArticleDOI
TL;DR: Central distribution of efferent and afferent components of the glossopharyngeal (IX) nerve in the cat was studied by applying horseradish peroxidase to the lesser petrosal nerve, carotid sinus nerve (CSN) or cervical trunk (CT) distal to the branching point of the CSN.

127 citations


Journal ArticleDOI
TL;DR: Attention is drawn to the picrotoxin site and its likely importance in the regulation of GABA-mediated inhibition by drugs.

104 citations


Journal ArticleDOI
TL;DR: Observations give further support to the proposed existence of a selective retrograde transport of D-[3H]asp and are consistent with the available evidence which indicates that the corticodorsal column nuclei path use glutamate and/or aspartate as neurotransmitter(s).

104 citations


Journal ArticleDOI
TL;DR: The projection of forelimb nerves to the cuneate nucleus was studied in the cat by the transganglionic transport method and appeared to constitute an area of overlap between projections from deep and superficial receptors.

72 citations


Journal ArticleDOI
TL;DR: In this paper, the course and termination of afferents in the spinal dorsolateral fascicle to some medullary sensory nuclei were studied by tracing degeneration following lesions of spinal white matter.
Abstract: The course and termination of afferents in the spinal dorsolateral fascicle to some medullary sensory nuclei were studied by tracing degeneration following lesions of spinal white matter. The main conclusions depend on successive degeneration experiments; other points were studied with single-stage lesions. The dorsal column nuclei were particu-larly studied; terminations in these nuclei following dorsolateral lesions followed a clear-cut pattern, with fibres arising from segments below T 6 terminating in the gracile nucleus and those with more rostral origin solely in the cuneate nucleus. In both nuclei, the major terminations were in their rostral third with most fibres traversing deep caudal regions where some termination also occurred. Some fibres ended contralaterally. These restricted regions of termination contrasted with the wide-spread terminations seen after lesions of the dorsal column. A region at the cuneate rostral pole, adjacent to but clearly separable from nucleus z, receives a dense projection from both caudal and rostral spinal levels, the former fibres terminating in the dorsal part of the region, the latter extending more ventrally. We treat this as a separate subnucleus. The afferents to the dorsal column nuclei (together with those terminating in the other nuclei studied) were confined to the extreme dorsolateral white matter. Our observations confirm the established view that only afferents arising from caudal segments (below at least T 4–5) terminate in nucleus z, and that afferents terminating in group x arise from all levels (at least between C 5 and L 5): also that neither receives any afferents through the dorsal columns. Dorsolateral fibres arising from segments above at least T 6 terminate in a clear-cut area at the lateral border of the external cuneate nucleus. Heavy terminal degeneration was also seen in the lateral cervical nucleus of afferents arising from both above and below T4–5

52 citations


Journal ArticleDOI
TL;DR: This experiment confirms that after chronic peripheral nerve injuries, central somatosensory neurons can begin to respond to ascending afferent volleys originating from other undamaged peripheral axons, which were previously incapable of exciting the cells.

50 citations


Journal ArticleDOI
TL;DR: Sodium valproate enhanced muscimol-induced depolarizations of rat cuneate afferent fibres, but only at millimolar concentrations, and reduced the potency of picrotoxin as an antagonist of muscIMol without affecting that of bicuculline.

48 citations


Journal ArticleDOI
TL;DR: In anesthetized decerebellate cats, with additional decerebration or decortication and with one of two types of cervical spinal cuts which either eliminated the dorsal half of the spinal cord or spared the dorsal funiculi, conditioning stimulation in the raphe nuclei or periaqueductal gray modified transmission in the cuneate nucleus is shown.

25 citations