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The styloglossus muscle is a bilaterally paired muscle of the tongue. It originates at the styloid process of the temporal bone. It inserts onto the side of the tongue. It acts to elevate and retract the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). [1]
The piriformis muscle (from Latin piriformis ' pear-shaped ') is a flat, pyramidally-shaped muscle in the gluteal region of the lower limbs. It is one of the six muscles in the lateral rotator group. The piriformis muscle has its origin upon the front surface of the sacrum, and inserts onto the greater trochanter of the femur. Depending upon ...
The styloid process gives attachments to several muscles, and ligaments. [1] It serves as an anchor point for several muscles associated with the tongue and larynx. [citation needed] stylohyoid ligament [citation needed] stylomandibular ligament [citation needed] styloglossus muscle (innervated by the hypoglossal nerve) [citation needed]
Muscle origin insertion innervation [2] Piriformis muscle: Anterior surface of sacrum between and laterally to the anterior sacral foramina: Superior boundary of greater trochanter: Nerve to the piriformis (S1-S2) Gemellus superior muscle: Ischial spine: Upper edge of Obturator internus muscle tendon (indirectly greater trochanter) Nerve to ...
The superior longitudinal muscle runs along the upper surface of the tongue under the mucous membrane, and functions to shorten and curl the tongue upward. It originates near the epiglottis, at the hyoid bone, from the median fibrous septum. The inferior longitudinal muscle lines the sides of the tongue, and is joined to the styloglossus muscle.
The superior border is free; it is thick and irregular, and marked near the center by an impression for the insertion of the piriformis.. The inferior border corresponds to the line of junction of the base of the trochanter with the lateral surface of the body; it is marked by a rough, prominent, slightly curved ridge, which gives origin to the upper part of the vastus lateralis.
The piriformis nerve, also known as the nerve to piriformis, is the peripheral nerve that provides motor innervation to the piriformis muscle. Structure [ edit ]
The second category occurs as a partial split of the stalk that occurred proximal to the coverage of the piriformis. There were two to three divisions of the inferior gluteal nerve under the piriformis that would further divide close to the insertion of the nerve into the actual muscle belly. [1]