Extensor



[ik-sten-ser, -sawr] /ɪkˈstɛn sər, -sɔr/

noun, Anatomy.
1.
a muscle that serves to or straighten a part of the body.
/ɪkˈstɛnsə; -sɔː/
noun
1.
any muscle that stretches or extends an arm, leg, or other bodily part Compare flexor
n.

1713, short for medical Latin musculus extensor, from Late Latin extensor “stretcher,” agent noun from Latin extensus (see extend).

extensor ex·ten·sor (ĭk-stěn’sər)
n.
A muscle that extends or straightens a limb or body part.
extensor
(ĭk-stěn’sər)
A muscle that extends or straightens a limb or joint. Compare flexor.

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  • Extensor muscle of fingers

    extensor muscle of fingers n. A muscle with origin from the lateral epicondyle of the humerus, with insertion into the base of the proximal, middle, and distal phalanges, with nerve supply from the radial nerve, and whose action extends the fingers.

  • Extensor muscle of index finger

    extensor muscle of index finger n. A muscle with its origin from the ulna, with insertion to an aponeurosis of the index finger, with nerve supply from the radial nerve, and whose action assists in extending the forefinger.



  • Extensor muscle of little finger

    extensor muscle of little finger n. A muscle with its origin from the lateral epicondyle of the humerus, with insertion to the dorsum of the proximal, middle, and distal phalanges of the little finger, with nerve supply from the radial nerve, and whose action extends the little finger.

  • Extensor retinaculum

    extensor retinaculum n. A strong fibrous band stretching obliquely across the back of the wrist and binding down the extensor tendons of the fingers and thumb.



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