Innervation density of mechanoreceptive fibres supplying glabrous skin of the monkey's index finger.

1. The innervation densities of mechanoreceptive fibres supplying the ridged glabrous skin of the middle and terminal phalanges of the monkey's (Macaca nemestrina) index finger were estimated using a combination of histological and neurophysiological procedures. 2. This estimate was based on (a) a count of the total number of A beta myelinated fibres in the palmar digital nerve at the level of the proximal phalanx, (b) the demonstration that the majority of A beta fibres in the monkey's palmar digital nerve are mechanoreceptive afferents, (c) the estimation, based on a sample of 398 fibres, of the fractions of rapidly adapting, slowly adapting and Pacinian mechanoreceptive fibres in the palmar digital nerve, and (d) the estimation of the area of glabrous skin innervated by the palmar digital nerve. 3. The estimated innervation density of the finger pad and the skin of the middle phalanx were: rapidly adapting fibres, 178 and 80/cm2; slowly adapting fibres, 134 and 46/cm2; and Pacinian fibres, 13/cm2 for both phalanges.

[1]  J. Hursh.  CONDUCTION VELOCITY AND DIAMETER OF NERVE FIBERS , 1939 .

[2]  N. Cauna,et al.  The structure of human digital pacinian corpuscles (corpus cula lamellosa) and its functional significance. , 1958, Journal of anatomy.

[3]  U. Lindblom,et al.  Properties of touch receptors in distal glabrous skin of the monkey. , 1965, Journal of neurophysiology.

[4]  U. Lindblom,et al.  The discharge from vibration-sensitive receptors in the monkey foot. , 1966, Experimental neurology.

[5]  A. Iggo,et al.  A quantitative study of cutaneous receptors and afferent fibres in the cat and rabbit , 1967, The Journal of physiology.

[6]  V. Mountcastle,et al.  The sense of flutter-vibration: comparison of the human capacity with response patterns of mechanoreceptive afferents from the monkey hand. , 1968, Journal of neurophysiology.

[7]  P K Thomas,et al.  Nerves and Nerve Injuries , 1969 .

[8]  M. Knibestöl,et al.  Single unit analysis of mechanoreceptor activity from the human glabrous skin. , 1970, Acta physiologica Scandinavica.

[9]  M. R. Chambers,et al.  The structure and function of the slowly adapting type II mechanoreceptor in hairy skin. , 1972, Quarterly journal of experimental physiology and cognate medical sciences.

[10]  R. Dykes,et al.  "Cold" fiber population innervating palmar and digital skin of the monkey: responses to cooling pulses. , 1973, Journal of neurophysiology.

[11]  K. O. Johnson,et al.  Peripheral neural determinants of temperature discrimination in man: a correlative study of responses to cooling skin. , 1973, Journal of neurophysiology.

[12]  Roland S. Johansson,et al.  Receptive field sensitivity profile mechanosensitive units innervating the glabrous skin of the human hand , 1976, Brain Research.

[13]  Å.B. Vallbo,et al.  SKIN MECHANORECEPTORS IN THE HUMAN HAND: NEURAL AND PSYCHOPHYSICAL THRESHOLDS , 1976 .

[14]  Apostolos P. Georgopoulos,et al.  Functional properties of primary afferent units probably related to pain mechanisms in primate glabrous skin , 1976 .

[15]  R. Johansson,et al.  SKIN MECHANORECEPTORS IN THE HUMAN HAND: AN INFERENCE OF SOME POPULATION PROPERTIES , 1976 .

[16]  R. Johansson.  Tactile sensibility in the human hand: receptive field characteristics of mechanoreceptive units in the glabrous skin area. , 1978, The Journal of physiology.

[17]  R. Johansson,et al.  Tactile sensibility in the human hand: relative and absolute densities of four types of mechanoreceptive units in glabrous skin. , 1979, The Journal of physiology.

[18]  K. O. Johnson,et al.  Peripheral neural representation of spatial dimensions of a textured surface moving across the monkey's finger pad. , 1980, The Journal of physiology.

[19]  I. Darian‐Smith,et al.  Peripheral neural representation of the spatial frequency of a grating moving across the monkey's finger pad. , 1980, The Journal of physiology.