INTRODUCTION: Anomalies of muscle and skin innervations are common. The innervation of the hand frequently differs from the usual description that we can find in text books. Some of these are clinically important, especially in electromyography. Neural anastomosis in the setting of an Ulnar or Median nerve lesion can produce confusing clinical and electrodiagnostic findings. Knowledge of a few common variations is crucial to the clinician in the performance of NCV and EMG studies to prevent faulty interpretation of the electrophysiological data and in the clinical evaluation of nerve injuries of the median and ulnar nerves, especially in association with entrapment syndromes.
Median nerve in the hand normally supplies APB, FPB (superficial head),OP, 1st and 2nd Lumbricals whereas Ulnar Nerve supplies FPB (deep head), Flexor and Abductor Digiti minimi, 3rd and 4th Lumbricals, Interossei and Adductor Pollicis. To our knowledge, reports of anomalies are under recognized and hence an attempt to bring forward the case study of such variants. The goal of this review is to highlight the important advances in anatomy, neurophysiology and methodology that impact upon the electrodiagnosis of anomalous innervations. The authors have obtained the patient’s informed consent for performing and publication of the case report.
To read the full article, you need to Purchase this issue. CLICK HERE TO ORDER NOW.