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  • Title: [An aberrant muscular nerve to the latissimus dorsi muscle from the posterior cutaneous nerve of the arm].
    Author: Horiguchi M, Koizumi M, Isogai S, Sekiya S.
    Journal: Kaibogaku Zasshi; 1992 Feb; 67(1):13-8. PubMed ID: 1514382.
    Abstract:
    In the 1987 student course on gross anatomy dissection of cadavers at Iwate Medical University School of Medicine, an aberrant muscular nerve to the latissimus dorsi muscle arising from the posterior cutaneous nerve of the arm was found bilaterally in a 65-year-old female who had died of acute pneumonia. The case was investigated anatomically. The posterior cutaneous nerve of the arm arose from the radial nerve approximately at the lateral axial border as the first branch independently on the right, and by forming a trunk with the nerve to the long head of the triceps brachii muscle on the left. The aberrant muscular nerve originated from the posterior cutaneous nerve of the arm about 3 cm distally to the point of the branching of the cutaneous nerve from the radial nerve. This aberrant nerve entered the latissimus dorsi muscle near the transitional area from the muscular part to the tendinous part while dividing into three on the right, and without dividing on the left. The side into which the aberrant nerve entered was just the reverse of the side into which the thoracodorsal nerve and artery supplied. The muscular part innervated by the aberrant nerve was bounded by a tendinous intersection for the most part of the latissimus dorsi muscle innervated by the thoracodorsal nerve. The intramuscular nerve distribution of the aberrant nerve was investigated under a binocular dissecting microscope. It was revealed that there was no communication between the ramification of the aberrant nerve and that of the thoracodorsal nerve.(ABSTRACT TRUNCATED AT 250 WORDS)
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