Palmaris Brevis

Written by Oliver Jones

Last updated October 18, 2022 • 4 Revisions

The palmaris brevis is an intrinsic muscle of the hand. It is a small, thin muscle, found superficially in the subcutaneous tissue of the hypothenar eminence.

  • Attachments: Originates from the palmar aponeurosis and flexor retinaculum and attaches to the dermis of the skin on the medial margin of the hand.
  • Actions: Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip.
  • InnervationUlnar nerve.
  • Blood Supply: Superficial palmar arch

Fig 1
Palmaris brevis.

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