Peripheral and Cortical Responses to Mechanical Stimulation of the Cat's Vibrissae

Keidel, W. D.; Keidel, U. O.; Kiang, N. Y. S.

doi:10.3109/13813456009083545

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…Both Hahn and Zucker & Welker found rapidly and slowly adapting responses but did not attempt to establish the particular types of receptors to which their units could be assigned. Afferent discharges from sinus hairs were recorded in the Gasserian ganglion (Kerr & Lysak, 1964), the trigeminal nuclei (Gordon, Landgren & Seed, 1961;Erickson, King & Pfaffmann, 1961;Kruger & Mfichel, 1962;Eisenmann, Landgren & Novin, 1963;Nord, 1967), in the ventrobasal thalamus (Waite, 1973) and in the cortex (Welker, 1971;Keidel, Keidel & Kiang, 1960) but in these investigations no attempt was made to differentiate the responses in detail. The existence of two rapidly and two slowly adapting mechanoreceptors in the sinus hair follicle of the cat reported in the present paper has been reported also by B. J. Pubols, P. J. Donovick & L. M. Pubols personal communication for the vibrissae of the opossum.…”

Section: Introductionmentioning

confidence: 99%

Functional characteristics of mechanoreceptors in sinus hair follicles of the cat

Gottschaldt¹,

Iggo²,

Young³

1973

The Journal of Physiology

274

116

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1. The discharge of impulses in afferent fibres dissected from the infraorbital and ulnar nerves of anaesthetized cats was recorded during controlled movements of the maxillary and carpal sinus hairs.2. Four main types of afferent units were identified. Two had slowly adapting responses characteristic of the epidermal type I, and dermal type II mechanoreceptors of the hairy skin. Two rapidly adapting responses to movement of the sinus hairs were found, one with a high velocity threshold and another with a low velocity threshold.3. The slowly adapting units showed a power relationship between the degree of displacement of the hair and the mean interspike interval of the response. Slowly adapting units also exhibited a power relationship between the velocity of displacement of a hair and the mean interspike interval of the response.4. The conduction velocities of all types of afferent units were measured and fell in the range of the Aalpha, fast myelinated fibres.5. Movements of the carpal sinus hairs yielded both types of slowly adapting response recorded in fibres of the ulnar nerve directly innervating the carpal sinus hair follicles, and rapidly adapting responses from Pacinian corpuscles, found in close association with, but external to, these follicles.6. On the basis of the findings in this study and the results of anatomical investigations of the receptor structures in the sinus hair follicle a correlation between the distinguishable afferent responses and the morphologically identifiable nerve endings has been proposed.

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Section: Introductionmentioning

confidence: 99%

Functional characteristics of mechanoreceptors in sinus hair follicles of the cat

Gottschaldt¹,

Iggo²,

Young³

1973

The Journal of Physiology

274

116

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Grundprinzipien der akustischen und taktilen Informationsverarbeitung

Keidel¹

1961

Ergebnisse Der Biologie

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A comparison of primary afferent and cortical neurone activity coding sinus hair movements in the cat

et al. 1976

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Responses in the somatosensory cortical area S I to stimulation of facial sinus hairs were recorded in the anaesthetized cat and compared with activity in primary afferent fibres innervating vibrissae follicles. The specific cortical vibrissa area is somatotopically organized; 39% of the cortical units in that area responded to stimulation of only a single sinus hair but in some cases all maxillary vibrissae activated a single cortical neurone. The responses consisted of three major groups; either a phasic discharge in response to the movement part of a stimulus, or an additional tonic discharge related to the steady period of vibrissa deflection, or a tonic discharge. On the basis of a comparison of response and excitability characteristics of primary afferent and cortical neurones it is concluded that all four kinds of peripheral units innervating sinus hair follicles project to the somatosensory cortical area S I. It appears from these findings that some cortical neurones receive a specific input related to a particular component of the complex primary afferent response in fibres innervating sinus hair follicles. The results are discussed with respect to previous reports on the central representation of facial sinus hairs in different species.

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Peripheral and Cortical Responses to Mechanical Stimulation of the Cat's Vibrissae

Cited by 5 publications

References 12 publications

Functional characteristics of mechanoreceptors in sinus hair follicles of the cat

Functional characteristics of mechanoreceptors in sinus hair follicles of the cat

Grundprinzipien der akustischen und taktilen Informationsverarbeitung

A comparison of primary afferent and cortical neurone activity coding sinus hair movements in the cat

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