Trochlear nerve all true except:
C i.e. Supplies ipsilateral superior oblique muscle Trochlear nerve is thinnest nerve. It is the only nerve to emerge from dorsum of brain stemQ has longest intracranial course. It enters orbit through outer pa of superior orbital fissure (ie lateral to annulus of Zinn)Q and supplies superior oblique muscle. Because it's a crossed cranial nerve (with decussation in mid brain), the trochlear nerve nucleus supplies contralateral superior oblique muscle.
Longest intracranial course
Arises from dorsum of brainstem
Supply ipsilateral superior oblique muscle
Enter orbit through sup.