THE ORIENTATIONAL PROJECTIONS OF SENSORY FIBRES OF RADIAL NERVE AND ULNAR NERVE TO THE SUBSTANTIA GELATINOSA OF THE SPINAL CORD IN RATS——AN ACID PHOSPHATASE TECHNIQUE STUDY / 解剖学报

ABSTRACT

The orientational projections of sensory fibres of radial nerve and ulnar nerve to the substantia gelatinosa(SG) of the spinal cord in rats were studied in accordance with the principle of transganglion degeneration by using the acid phosphatase technique.It was found that the affeernt fibers of the radial nerve projected chiefly to SG, from the upper part of C_6 to the middle part of T_1 longitudinally; the ulnar nerves projected chiefly to SG from the middle part of C_6 to the middle part of T_1.In their transverse projections,the afferent fibres of the radial nerve were mainly found in the region of the whole area of the middle 1/3 of SG; and the afferent fibres of ulnar nerve were found within the centre line of SG, and mainly in the region of the lateral 1/2～3/4 at medial half. In summary, radial nerve projected to the lateral region and ulnar nerve to the medial region of SG.