Arcade of Frohse

The arcade of Frohse (pronounced "\ˈfʁoːzə \") is also known as the supinator arch.

The arcade is formed by a fibrous band between the two heads of the supinator muscle. The deep branch of the radial nerve passes beneath the arcade accompanied by vessels known as the leash of Henry.

Radiographic appearance

Caution should be exercised when evaluating the deep branch of the radial nerve since it may change shape after passing under the arcade and still be normal .

Related pathology

The deep branch of the radial nerve may become entrapped in the arcade of Frohse, leading to posterior interosseous nerve syndrome.

History and etymology

It is named after the German anatomist Fritz Frohse (1871-1916) .