Arcade of Frohse

Last revised by Dr Johannes Schmid on 23 Jan 2020

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.

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 2.

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

It is named after the German anatomist Fritz Frohse (1871-1916) 3.

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Cases and figures

  • Figure 1
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