Anomalous muscle belly to the index finger
Sujatha D'Costa1, Jiji, Soubhagya R Nayak
1Department of Anatomy, Centre for Basic Sciences, Kasturba Medical College, Mangalore, Karnataka, India.
Abstract:
An unusual variation of flexor digitorum superficialis was observed during the cadaver dissection. The flexor digitorum superficialis (FDS) had a normal origin and insertion, except to the index finger, where a muscle belly replaced the tendon of FDS. The unusual muscle belly originated as a continuation of FDS tendon in the carpal tunnel and inserted normally into the middle phalanx. A branch of the median nerve innervated the anomalous muscle belly. The anomalous muscle belly described here should be considered in the aetiology of carpal tunnel syndrome.
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