Which of the following statement is not true about the Trochlear nerve?
Trochlear nerve is the fouh cranial nerve. It is a motor nerve ( somatic efferent nerve), whichinnervates superior oblique muscle, which depress the eye in adduction and in cyclodetes the eyeball.It is the smallest nerve in terms of the number of axons it contains. Other than the optic nerve (cranial nerve II), it is the only cranial nerve that decussates(crosses to the other side) before innervating its target.Finally, it is the only cranial nerve that exits from the dorsal aspect of the brainstem.Injury to the trochlear nerve cause weakness of downward eye movement with consequent veical diplopia (double vision).
It has the longest intracranial course
It innervates superior oblique muscle, which depress the eye in abduction and detes the eyeball
It is the only cranial nerve that arises from the dorsal aspect of the brainstem
It enters the orbit through the superior orbital fissure outside the annulus of Zinn