pterygoid muscle


pterygoid muscle
pterygoid muscle n either of two muscles extending from the sphenoid bone to the lower jaw:
a) a muscle that arises from the greater wing of the sphenoid bone and from the outer surface of the lateral pterygoid plate, is inserted into the condyle of the mandible and the articular disk of the temporomandibular joint, and acts as an antagonist of the masseter, temporalis, and medial pterygoid muscles called also external pterygoid muscle, lateral pterygoid muscle
b) a muscle that arises from the inner surface of the lateral pterygoid plate and from the palatine and maxillary bones, is inserted into the ramus and the gonial angle, cooperates with the masseter and temporalis in elevating the lower jaw, and controls certain lateral and rotary movements of the jaw called also internal pterygoid muscle, medial pterygoid muscle

Medical dictionary. 2011.

Look at other dictionaries:

  • pterygoid muscle — noun muscle descending from the sphenoid bone to the lower jaw • Hypernyms: ↑skeletal muscle, ↑striated muscle * * * noun : either of two muscles extending from the sphenoid bone to the lower jaw: a. : an external muscle that arises from the… …   Useful english dictionary

  • pterygoid muscle external — musculus pterygoideus lateralis …   Medical dictionary

  • pterygoid muscle internal — musculus pterygoideus medialis …   Medical dictionary

  • pterygoid muscle lateral — musculus pterygoideus lateralis …   Medical dictionary

  • pterygoid muscle medial — musculus pterygoideus medialis …   Medical dictionary

  • Medial pterygoid muscle — Medial pterygoid The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed. (Internus is visible at center bottom.) …   Wikipedia

  • Lateral pterygoid muscle — Infobox Muscle Name = PAGENAME Latin = m. pterygoideus lateralis, m. pterygoideus externus GraySubject = 109 GrayPage = 386 | Caption = The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed. (Labeled as… …   Wikipedia

  • external pterygoid muscle — n PTERYGOID MUSCLE (a) …   Medical dictionary

  • internal pterygoid muscle — n PTERYGOID MUSCLE (b) …   Medical dictionary

  • lateral pterygoid muscle — n PTERYGOID MUSCLE (a) …   Medical dictionary