Anatom3DPosterior interosseous nerve of forearm
Nervus interosseus antebrachii posterior · Zadní mezikostní nerv předloktí
Nervous system
Looks like
The continuation of the deep radial branch, running along the back of the forearm on the membrane between the bones.
What it does
Moves the finger and thumb extensors and brings feeling from the back of the wrist joint.
Keeping it well
Injury (elbow fractures, surgery) causes finger drop with the wrist still able to lift.