The index finger extensor

Extensor indicis · musculus extensor indicis

A small forearm muscle that lets your index finger point on its own.

What it does

The extensor indicis is a deep forearm muscle with its own tendon to the index finger. It lets you straighten the index finger independently of the others, which is why you can point while keeping your other fingers curled.

Nearby

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Sources

Drafted with AI help; awaiting a human fact-check against these sources.

Open in the 3D atlas · Suggest a correction · Not medical advice.

3D models: Z-Anatomy & BodyParts3D (CC BY-SA 4.0 / 2.1 JP). Card text CC BY 4.0.