A STUDY OF THE MICROSURGICAL ANATOMY OF THE MEDIAN NERVE
- VernacularTitle:正中神经的显微外科解剖学研究
- Author:
Shizhen ZHONG
;
Muzhi LIU
;
Jiakai ZHU
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1957;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
The upper limbs of 23 adult cadavers were dissected and the internal structures of the median nerve were studied for microsurgery of the nerve.Under operative micros- cope(24X),the median nerves of 20 cadavers treated with 10% acetic acid were dissec- ted.The median nerves of the remaining three were cross-sectioned,inch by inch,and stained with Sudan Ⅲ for microscopic observation.Microscopic ptotographs were taken to visualize the intra-neural topography of motor bundles or bundle groups. 1.The morphology,topographic relationships,size and number of bundles of the median nerves were observed under microscope and were recorded. 2.At the level of the arm and forearm,the nerve trunk and its internal bundles appear to twist to a certain degree in the way of external rotation from the distal to proximal. 3.The motor bundles of the thenar muscles emerge at the level about 40.1mm below the styloid process of radius.They enter the nerve trunk anteriorly on the radial side,and run upward at the Rower part of the forearm,and continue postero-laterally and appear as a admixture of sensory and motor nerves.At the mid-portion of the fore- arm,they are situated posteriorly,while at the level of antecubital fossa and above, they occupy the central position and finally most of the bundles join the medial head of the median nerve. 4.The motor bundles that supply the flexor muscles of the forearm are located anteriorly and posteriorly in separate portions after entering the nerve trunk.At the level of the arm,these two portions of median nerve are mixed bundles but motor nerve fibers predominate. 5.The fundamental method of funicular suture were discussed in relation to the intra-neural topography of the median nerve.
