Extensor digitorum

The extensor digitorum muscle is one of the main muscles on the backside of the forearm. It is found in human beings and other mammals, and is also sometimes known by the name of extensor digitorum communis. It provides an extension for the medial digits in the hands. The muscle originates from the lateral epicondyle, and then segregates down into four tendons. The tendons run through an enclosure of the lateral carpal ligament layered between a sheath of mucous. The four tendons eventually separate on the posterior part of the hand, and extend into the distal and middle finger phalanges. The tendons to the four fingers are interconnected with the help of two slanting bands. In some cases, the first and second tendons may be interconnected by a small transverse band. This group of bands is called the sagittal bands. Their function is to keep the extensor tendons aligned properly above the metacarpal head. This helps to improve the hand's leverage. The extensor digitorum muscle helps in the movements of the wrists and the elbows.
Written and medically reviewed by the Healthline Editorial Team
Co-developed by:

In Depth: Extensor digitorum

Debugging Tools

Level: 2
Frame: 6
Toggle Hotspot
VP Data Tool
HexTable json from Steve
Steve's ajax layer update call:
[still on original layer]

Ad values:

adModel.dfpAdSite: hn.us.hl.bm.x.x.x
adParams['k1']: othermusculoskeletaldisorders,extensor_digitorum_muscle,8815718

More on BodyMaps

Take a Video Tour

Learn how to rotate, look inside and explore the human body. Take the tour

BodyMaps Feedback

How do you like BodyMaps? How can we improve it? Tell us what you think