What is the superficial fascia of the palm?

The superficial fascia of the palm is a layer of dense fibrous tissue that anchors the skin to the deep fascia. It helps with grip and protects underlying structures like nerves and vessels.

What structures are found in the superficial fascia of the palm?

It contains the palmaris brevis muscle, a small subcutaneous muscle on the ulnar side, and the superficial metacarpal ligament, which spans the finger roots and covers digital nerves and vessels.

What is the palmaris brevis muscle?

The palmaris brevis is a small subcutaneous muscle located in the superficial fascia on the ulnar side of the hand. It wrinkles the medial skin during gripping to enhance grip and resist displacement.

What is the origin and insertion of the palmaris brevis muscle?

It originates from the flexor retinaculum and palmar aponeurosis, and inserts into the skin on the medial border of the hand.

What nerve supplies the palmaris brevis muscle?

The palmaris brevis is innervated by the superficial branch of the ulnar nerve.

What is the function of the palmaris brevis muscle?

Its main actions are to wrinkle the medial skin when gripping objects, which enhances grip and helps resist ulnar displacement of the hypothenar eminence.

How does the superficial fascia contribute to hand function?

By anchoring the skin to the deep fascia, it provides stability and protection for underlying structures, and its components like the palmaris brevis and superficial metacarpal ligament aid in grip and nerve/vessel coverage.

Superficial Palmar Fascia – Anatomy & Palmaris Brevis

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