Not a true statement regarding 3rd cranial nerve:: (A) Palsy may lead to ptosis, (B) Nucleus in lower mid brain, (C) Uncontrolled BP is a common cause, (D) Supplies medial rectus
Answer is B. Nucleus of 3rd cranial nerve at the level of superior colliculus in the mid-brain. 3rd nerve supplies all the muscles of eye except lateral rectus( LR6) & superior oblique(SO4) 3rd CN palsy: -Pupil is down & out -Ptosis (as LPS also paralysed) -Common causes- uncontrolled BP/HTN