Gantzer muscle

Last revised by Henry Knipe on 13 Jan 2022

The Gantzer muscle is an anomalous head of the flexor pollicis longus muscle, an accessory muscle of the forearm. Some authors 1 suggest that this muscle is present in ~70% of limbs and should be considered a normal anatomical pattern rather than an anatomical variation.


Related pathology

It may contribute to the median nerve and anterior interosseous nerve compression.

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