Authors: Rupanjali B, Vijayalakshmi B, Chandrasekhar M
The most frequently occurring anomaly in the upper extremities has been the Martin Gruber Anastomoses (MGA) which occurs due to the crossover of nerve fibers from the median nerve to ulnar nerve. This study was performed to investigate the prevalence of MGA in 100 healthy medical students as it acts as an etiology to carpal tunnel syndrome and other hand injuries. A nerve conduction study for median and ulnar nerve was performed by placing the surface electrodes on the Thenar, Hypothenar and first dorsal interosseus muscle with their Compound Muscle Action Potential (CAMP) and their amplitudes being evaluated. MGA was found in 23 out of 100 volunteers. This relatively high incidence demonstrates the necessity for healthcare specialists to factor the MGA into their diagnosis.
Keywords: Martin Gruber Anastomoses, Nerve Conduction study, Compound Muscle Action Potential