<anatomy, muscle> Origin, from platysma and fascia of masseter; insertion, orbicularis oris and skin at corner of mouth; action, draws angle of mouth laterally, lenghthening rima oris; nerve supply, facial.

Synonyms: musculus risorius, Albinus' muscle, Santorini's muscle.

Origin: L. Risor, a laughter, fr. Rideo, pp. Risus, to laugh

(05 Mar 2000)

Risley, Samuel, Risley's rotary prism, risorial < Prev | Next > risperidone, RISQL, rissoid, rissole

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