Cortical potentials evoked by stimulation of tooth pulp afferents in the cat

Vyklicky, Ladislav; Keller, O.; Brozˇek, G.; Butkhuzi, S. M.

doi:10.1016/0006-8993(72)90631-2

Cited by 33 publications

(1 citation statement)

References 5 publications

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“…Field potentials have been recorded following tooth-pulp stimulation in cats, monkeys and man. In early studies the potentials appeared as negativities in the somatosensory area where initially positive potentials could be elicited by activation of low threshold afferents in similar receptive fields (Van Hassel 1969;Vyklicky 1972;). These observations were at variance with the findings made in experiments with cortical lesions and it could be suspected that the restricted response area after noxious stimulation was a result of the general anaesthesia.…”

Section: Ortical Surface Responsesmentioning

confidence: 99%

Cortical nociceptive systems

Andersson

Rydenhag

1985

Phil. Trans. R. Soc. Lond. B

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There is evidence that the cerebral cortex is involved in the perception of pain but no specific area appears to be the 'pain centre'. Limited knowledge exists on the cortical processing of the noxious input. The nociceptors are most likely to activate at least two different systems with different characteristics. One has a bilateral cortical projection, no apparent topographical pattern, low synaptic security and excites cells in large areas. This system may give rise to the widespread increase in blood flow and the widely distributed surface potentials recorded in man following a painful stimulus. Noxious stimuli also excite a system with contralateral topographical projection, high synaptic security and termination in lamina IV. This system produces EPSP-IPSP sequences in cells in a restricted cortical area. Pronounced inhibition of cells in lamina IV and more superficial layers is induced by activity in low threshold afferents. Thus, similarly as at the segmental spinal level, the nociceptive input to cortical cells is processed and integrated with the activity in other afferent systems.

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Section: Ortical Surface Responsesmentioning

confidence: 99%

Cortical nociceptive systems

Andersson

Rydenhag

1985

Phil. Trans. R. Soc. Lond. B

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The posterior thalamic region and its cortical projection in new world and old world monkeys

Burton

Jones

1976

J of Comparative Neurology

508

206

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The posterior nuclear complex of the thalamus in rhesus, pigtailed and squirrel monkeys consists of the combined suprageniculate-limitans nucleus and an ill defined region of heterogeneous cell types extending anteriorly from the dorsal lobe of the medial geniculate body towards the posterior pole of the ventral nuclear complex. This region is referred to as the posterior nucleus. It is directly continuous with the ventroposteroinferior nucleus. The cortical projections of each of these nuclei, together with those of the adjacent ventral, pulvinar and medial geniculate complexes, have been studied by means of the autoradiographic tracing technique. The suprageniculate-limitans nucleus, the main input to which is the superior colliculus, projects upon the granular insular area of the cortex. The medial portion of the posterior nucleus projects to the retroinsular field lying posterior to the second somatic sensory area. There is clinical and electrophysiological evidence to suggest that the retroinsular area may form part of a central pain pathway. The lateral portion of the posterior nucleus which is closely related to certain elements of the medial geniculate complex, projects to the postauditory cortical field. The ventroposterioinferior nucleus, which may be involved in vestibular function, projects to the dysgranular insular field. The principal medial geniculate nucleus can be subdivided into a ventral division that projects to field AI of the auditory cortex and a dorsal division that merges with the posterior nucleus; it is further subdivided into an anterodorsal component that projects to two fields on the superior temporal gyrus, together with a posterodorsal component in which separate cell populations project to areas lying anterior and medial to AI. The magnocellular medial geniculate nucleus, sometimes considered a part of the posterior complex, appears to project diffusely to layer I of all the auditory fields. The auditory fields are bounded on three sides by the projection field of the medial nucleus of the pulvinar which also extends into the upper end of the lateral sulcus to bound the fields receiving fibers from the posterior nucleus. The topography of the areas receiving fibers from the posterior, medial geniculate and pulvinar complexes, taken in conjunction with the rotation of the primate temporal lobe, permits all of these fields to be compared with similar, better known areas in the cat brain.

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Neurale Grundlagen des Schmerzes

Gottschaldt¹

1978

Aktuelle Probleme Der Neuropsychiatrie

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Cortical potentials evoked by stimulation of tooth pulp afferents in the cat

Cited by 33 publications

References 5 publications

Cortical nociceptive systems

Cortical nociceptive systems

The posterior thalamic region and its cortical projection in new world and old world monkeys

Neurale Grundlagen des Schmerzes

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