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Bipennate muscle

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Title: Bipennate muscle  
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Subject: Arthropod leg, Unipennate muscle
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Bipennate muscle

Bipennate muscle
Different skeletal muscle types:
A: fusiform. B: unipennate. C: bipennate.
(P.C.S., physiological cross-section)
Latin Musculus pennatus, musculus bipennatus
Gray's subject #102 361

A bipennate muscle is a pennate muscle type that consists of two rows of oblique muscle fibres, facing in opposite diagonal directions, converging on a central tendon.

Bipennate muscle is stronger than unipennate muscle and fusiform muscle, due to a larger physiological cross-sectional area. Bipennate muscle shortens less than unipennate muscle but develops greater tension when it does, translated into greater power but less range of motion. Pennate muscles generally also tire easily.

Examples of bipennate muscle in the human body are:


This article incorporates text from a public domain edition of Gray's Anatomy.

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