Hydrocephalus and Congenital Clasped Thumbs: a Case Report with Electromyographic Evaluation

Abstract

A 1 mo. old male infant with hydrocephalus, aqueductal stenosis and congenital clasped thumbs was reported. Electromyographic evaluation supported the hypothesis that the clasped thumbs were a consequence of flexion-extension imbalance, with subsequent muscle contracture secondary to hypoplasia or aplasia of the thumb extensors.