Muller's muscle is supplied by:
Each eyelid from anterior to posterior consists of thefollowing layers:1. Skin2. Subcutaneous areolar tissue3. Layer of striated muscle (orbicularis oculi andlevator palpebrae superioris in upper lid only)4. Submuscular areolar tissue5. Fibrous layer (tarsal) plate and septum orbitale6. Layer of non-striated muscle fibres (Muller'smuscle)7. Conjunctiva Layer of striated muscle. consists of orbicularis muscle which forms an oval sheet across the eyelids. It closes the eyelids and is supplied by zygomatic branch of the facial nerve. in paralysis of facial nerve there occurs lagophthalmos which may be complicated by exposure keratitis. Levator palpebrae superioris muscle (LPS).(main muscle ) It arises from the apex of the orbit and is inseed by three pas on the skin of lid, anterior surface of the tarsal plateand conjunctiva of superior fornix. It raises the upper lid. It is supplied by a branch of oculomotor nerve Layer of non-striated muscle fibres. It consists of the palpebral muscle of Muller (ascessory muscle)which lies deep to the septum orbitale in both the lids. In the upper lid it arises from the fibres of LPS muscle in the lower lid from prolongation of the inferior rectus muscle and is inseed on the peripheral margins of the tarsal plate. It is supplied by sympathetic fibres it helps in initial 15o opening of eye .
3rd cranial nerve
4th cranial nerve
Sympathetic fibers
Parasympathetic fibers
Neuro Ophthalmology