Electrophysiologic studies of the thoracic limb of the horse.

TitleElectrophysiologic studies of the thoracic limb of the horse.
Publication TypeJournal Article
Year of Publication1982
AuthorsBlythe LL, Kitchell RL
JournalAmerican journal of veterinary research
Volume43
Issue9
Pagination1511-24
Date Published1982 Sep
ISSN0002-9645
KeywordsAnimals, Cats, Dogs, Electrophysiology, Female, Forelimb, Horses, Male, Radial Nerve, Skin, Thoracic Nerves, Ulnar Nerve
Abstract

The cutaneous innervation of the thoracic limb was investigated in 18 barbiturate-anesthetized horses, using electrophysiologic techniques. The cutaneous area (CA) innervated by each cutaneous nerve was delineated in at least 4 horses by stroking the hairs with a small watercolor brush while recording from the nerve. Mapping of adjacent CA revealed areas of considerable overlap. The part of a CA of a given nerve supplied only by that nerve is referred to as its autonomous zone (AZ). In contrast to the standard textbook illustrations cutaneous branches of the axillary, radial, musculocutaneous, and ulnar nerves overlapped extensively in the antebrachium. Clinically testable AZ were found in the antebrachium for the caudal cutaneous antebrachial nerve of the ulnar nerve and in the carpus and manus for the cutaneous branches of the median, ulnar, and musculocutaneous nerves; AZ were not found for the cutaneous branches of the radial and axillary nerves.

Alternate JournalAm. J. Vet. Res.