Abstract
1. Responses in mechanoreceptive afferent fibres innervating the monkey's finger pads were examined when a ridged surface ("grating') was moved across the fibre's receptive field with a specified velocity and applied force. 2. The stimulus feature represented in single fibre responses was the temporal frequency of the moving grating (stimulus temporal frequency = velocity of moving surface/spatial period); information about the spatial period of the grating was represented equivocally. 3. Peripheral neural representation of the grating's spatial period (or spatial frequency) depended on information signalled by the responding fibre population rather than by individual fibres. 4. The three mechanoreceptive fibre populations responded differentially to a grating moving across the finger pad. Slowly adapting fibres coded best those stimulus combinations with a stimulus temporal frequency in the range 20-60 Hz, rapidly adapting fibres coded best those with frequencies of 60-200 Hz, and Pacinian fibres best defined those stimuli with a high temporal frequency (100-300 Hz). 5. Applying the moving grating to the skin with varying radial forces in the range 20-60 g wt. did not greatly modify the pattern of discharge in the responding fibre populations.
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Selected References
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- Darian-Smith I., Davidson I., Johnson K. O. Peripheral neural representation of spatial dimensions of a textured surface moving across the monkey's finger pad. J Physiol. 1980 Dec;309:135–146. doi: 10.1113/jphysiol.1980.sp013499. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Darian-Smith I., Johnson K. O., Dykes R. "Cold" fiber population innervating palmar and digital skin of the monkey: responses to cooling pulses. J Neurophysiol. 1973 Mar;36(2):325–346. doi: 10.1152/jn.1973.36.2.325. [DOI] [PubMed] [Google Scholar]
- Darian-Smith I., Kenins P. Innervation density of mechanoreceptive fibres supplying glabrous skin of the monkey's index finger. J Physiol. 1980 Dec;309:147–155. doi: 10.1113/jphysiol.1980.sp013500. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Johansson R. S. Receptive field sensitivity profile of mechanosensitive units innervating the glabrous skin of the human hand. Brain Res. 1976 Mar 12;104(2):330–334. doi: 10.1016/0006-8993(76)90627-2. [DOI] [PubMed] [Google Scholar]
- Johansson R. S., Vallbo A. B. Tactile sensibility in the human hand: relative and absolute densities of four types of mechanoreceptive units in glabrous skin. J Physiol. 1979 Jan;286:283–300. doi: 10.1113/jphysiol.1979.sp012619. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Knibestöl M., Vallbo A. B. Single unit analysis of mechanoreceptor activity from the human glabrous skin. Acta Physiol Scand. 1970 Oct;80(2):178–195. doi: 10.1111/j.1748-1716.1970.tb04783.x. [DOI] [PubMed] [Google Scholar]
- Lindblom U., Lund L. The discharge from vibration-sensitive receptors in the monkey foot. Exp Neurol. 1966 Aug;15(4):401–417. doi: 10.1016/0014-4886(66)90138-5. [DOI] [PubMed] [Google Scholar]
- Lindblom U. Properties of touch receptors in distal glabrous skin of the monkey. J Neurophysiol. 1965 Sep;28(5):966–985. doi: 10.1152/jn.1965.28.5.966. [DOI] [PubMed] [Google Scholar]
- Talbot W. H., Darian-Smith I., Kornhuber H. H., Mountcastle V. B. The sense of flutter-vibration: comparison of the human capacity with response patterns of mechanoreceptive afferents from the monkey hand. J Neurophysiol. 1968 Mar;31(2):301–334. doi: 10.1152/jn.1968.31.2.301. [DOI] [PubMed] [Google Scholar]