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Electrophysiologic study of martin–gruber anastomosis (mga) in central indian subjects

Authors:Sachin Pawar , Bhupendra Gathe , Jain AP , Ramji Singh
Int J Biol Med Res. 2011; 2(4): 1165 - 1167  |  PDF File


Aim: The commonly encountered anomaly in upper extremities in which there is a cross-over of median to ulnar fibers is known as Martin Gruber Anastomosis (MGA). The present study was aimed to find out prevalence of MGA to First dorsal interosseous(FDI) and Abductor Digiti Minimi (ADM) muscle in normal healthy Central Indian subjects. Method: It was a cross-sectional study conducted on 100 normal healthy subjects in age group of 20-50 years residing in rural central India.Whenever there were more than 10% drop in the compound muscle action potential amplitude between wrist & below elbow site on routine ulnar motor study, median nerves were stimulated at wrist & at anticubital fossa while active electrode on ulnar innervated muscles. Result: MGA to FDI was found in all 12 subjects who had MGA. MGA to ADM was found in 7 out of 12 subjects. Conclusion: Identification of MGA has clinical significance. Prevalence of MGA in present study was found to be 12%.