Extensor Carpi Digitorum

Diagram of Posterior Muscles of the Human Body

The extensor carpi digitorum muscles are deep muscles located on the dorsal surface of each hand.

In general an 'extensor' muscle is one that causes the extension (straightening) of a limb or other part of the body.

Origin, Insertion and Actions of the Extensor Carpi Digitorum muscles:

Point of Origin:
Points of Insertion:
  • Phalanges of the fingers, via tendons to digits 2-5
Actions:
  • Extends the hands and fingers
  • Extends the wrist

The approximate locations of the extensor carpi digitorum muscles are labelled on our diagram of human posterior muscles.

More about Muscles:

The following are some popular pages in the section about the human muscular system:

There are also more pages about the words used to describe muscles (terminology), the anatomy and physiology of muscles, muscular disorders and associated topics. See also books about sports medicine.

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