Lateral pterygoid muscle
lateral pterygoid muscle n.
A muscle whose inferior head has origin from the pterygoid process, and whose superior head has origin from the sphenoid bone, with insertion into the mandible and the articular disk, with nerve supply from the lateral pterygoid branch of the trigeminal nerve, and whose action brings the jaw forward and opens it.
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lateral plate n. One of two nonsegmented masses of mesoderm on either side of the embryonic disk.
- Lateral rectus muscle
lateral rectus muscle n. A muscle with origin from the lateral part of tendinous ring bridging the superior orbital fissure, with insertion into the sclera of the eye, with nerve supply from the abducens nerve, and whose action directs the pupil laterally.
- Lateral rectus muscle of head
lateral rectus muscle of head n. A muscle with origin from the transverse process of the atlas, with insertion into the occipital bone, with nerve supply from the first cervical nerve, and whose action inclines the head to one side.
- Lateral recumbent position
lateral recumbent position n. See Sims’ position.
- Lateral region
lateral region n. The region of the abdomen lying on either side of the umbilical region and between the hypochondriac and inguinal regions.