The main muscles, in the upper eyelid, that control the opening and closing are the orbicularis oculi and levator palpebrae superioris muscle.
32.
It rests on the buccinator and levator anguli oris, and passes either over or under the infraorbital head of the levator labii superioris.
33.
It rests on the buccinator and levator anguli oris, and passes either over or under the infraorbital head of the levator labii superioris.
34.
If the lower fibers are inactive, the serratus anterior and upper trapezius work in tandem with rhomboids and levators to elevate the entire scapula.
35.
The "'zygomaticus minor "'is sometimes referred to as the " zygomatic head " of the levator labii superioris muscle.
36.
With recurrent straining, e . g . during difficult labour or long term constipation, then stretch injury can damage the nerves supplying levator ani.
37.
It serves as the insertion for the Tensor veli palatini and Levator veli palatini, and the origin for the Musculus uvulae, Palatopharyngeus, and Palatoglossus.
38.
It gives origin to the Levator ani and Obturator internus, and attachment to the puboprostatic ligaments and to a few muscular fibers prolonged from the bladder.
39.
The layer covering the upper surface of the pelvic diaphragm follows, above, the line of origin of the Levator ani and is therefore somewhat variable.
40.
The "'levator palpebrae superioris "', which is innervated by a branch of the oculomotor nerve, also elevates the upper eyelid.
