HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Hongo, T Articles by Yoshida, K Search for Related Content PubMed PubMed Citation Articles by Hongo, T Articles by Yoshida, K

Department of Physiology, University of Tsukuba, Ibaraki, Japan.

1. The spatial patterns of reflexes elicited by localized pressure stimulation of the foot skin were analysed by recording electromyographic activities of various hindlimb muscles or muscle nerve discharges in cats anaesthetized with sodium pentobarbitone. 2. Reflex discharges evoked by stimulation of the central pad occurred mainly in physiological toe extensors located in the foot. Stimulus-response relationships of single motor units revealed characteristically wide ranges of graded response and recruitment. 3. Within the central pad, the strongest excitation was evoked from the central lobe and was distributed to extensors of all four toes. Excitation from the medial and the lateral lobes was usually asymmetrical and weaker in toe muscles of the stimulated side. It is suggested that the weakness was in part due to concomitant inhibition. 4. Stimulation of a toe pad caused marked suppression of central pad-evoked activity of toe extensors with a highly specific spatial pattern. The inhibition was strongest in extensors of its own toe, and gradually weaker in the more distant toes. Weak excitation was occasionally evoked in extensors of the most medial or lateral toes, when the most lateral or the most medial toe-pad, respectively, was stimulated. 5. A similar pattern of relfex to that from the toe pad was evoked from the claw base and the hairy toe dorsum of each digit. 6. Reflex effects, both inhibitory and excitatory, from the central and toe pads, claw bases and toe dorsum were maintained during prolonged stimuli, indicating that slowly adapting receptors contributed to these reflexes. 7. It is concluded that stimulation of localized skin areas of the foot, particularly the pads, evokes highly specialized reflexes, which may be important in controlling movements of individual digits.

This article has been cited by other articles:

				J. Quevedo, K. Stecina, and D. A. McCrea Intracellular Analysis of Reflex Pathways Underlying the Stumbling Corrective Reaction During Fictive Locomotion in the Cat J Neurophysiol, September 1, 2005; 94(3): 2053 - 2062. [Abstract] [Full Text] [PDF]

				J.-F. Perrier, B. L. D'Incamps, N. Kouchtir-Devanne, L. Jami, and D. Zytnicki Cooperation of Muscle and Cutaneous Afferents in the Feedback of Contraction to Peroneal Motoneurons J Neurophysiol, June 1, 2000; 83(6): 3201 - 3208. [Abstract] [Full Text] [PDF]

				J.-F. Perrier, B. L. D'Incamps, N. Kouchtir-Devanne, L. Jami, and D. Zytnicki Effects on Peroneal Motoneurons of Cutaneous Afferents Activated by Mechanical or Electrical Stimulations J Neurophysiol, June 1, 2000; 83(6): 3209 - 3216. [Abstract] [Full Text] [PDF]

				B. M. H. Van Wezel, F. A. M. Ottenhoff, and J. Duysens Dynamic Control of Location-Specific Information in Tactile Cutaneous Reflexes from the Foot during Human Walking J. Neurosci., May 15, 1997; 17(10): 3804 - 3814. [Abstract] [Full Text] [PDF]