Anterior interosseous nerve syndrome. Compression of the anterior interosseous nerve, one branch of the median nerve, can cause paralysis in the fingers in more severe cases.

The anterior interosseous nerve is a motor nerve branch of the median nerve. A motor nerve is involved with muscle function. Compression of this nerve can occur at one or more sites in your forearm.

The anterior interosseous artery is also known as the volar interosseous artery. It is an artery of the forearm. The term “volar” refers to the palm of the hand or sole of the foot.