Unipennate muscle

Unipennate muscle
A, fusiform; B, unipennate; C, bipennate; P.C.S., physiological cross-section.
Latin musculus semipennatus, musculus unipennatus
Gray's subject #102 361

In some muscles (e. g. the peronei) the fibers are, like the plumes of a quill pen, to one side of a tendon, which runs the entire length of the muscle; such muscles are termed unipennate.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.