Extensor muscle

An extensor muscle is any muscle that opens a joint increasing the angle between components of a limb, such as straightening the knee or elbow and bending the wrist or spine. With the exception of the knee joint the movement is directed backward. This action is known as extension.

Flexor muscles have the opposite effect, closing a joint and decreasing the angle between limb components.

In humans, some muscles include 'extensor' in their name, some include;

*Extensor carpi radialis brevis
*Extensor hallucis longus muscle
*Extensor carpi ulnaris muscle
*Extensor carpi radialis longus muscle

For further reference see genetic origin.

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extensor muscle of digits common — extensor muscle of fingers musculus extensor digitorum … Medical dictionary
extensor muscle — ▪ anatomy any of the muscles that increase the angle between members of a limb, as by straightening the elbow or knee or bending the wrist or spine backward. The movement is usually directed backward, with the notable exception of the knee joint … Universalium
extensor muscle — noun a skeletal muscle whose contraction extends or stretches a body part • Syn: ↑extensor • Ant: ↑flexor (for: ↑extensor) • Derivationally related forms: ↑extend ( … Useful english dictionary
extensor muscle — The muscle which extends the leg at the MC joint (Fig. 19) [Warner, 1977] … Crustacea glossary
extensor muscle of index finger — extensor indicis muscle musculus extensor indicis … Medical dictionary
extensor muscle of fifth digit proper — musculus extensor digiti minimi … Medical dictionary
extensor muscle of great toe long — musculus extensor hallucis longus … Medical dictionary
extensor muscle of great toe short — musculus extensor hallucis brevis … Medical dictionary
extensor muscle of little finger — musculus extensor digiti minimi … Medical dictionary
extensor muscle of thumb long — musculus extensor pollicis longus … Medical dictionary

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Extensor muscle

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