The trochlear nerve supplies only somatic efferent motor fibers. Is the only cranial nerve to exit from the dorsal aspect of the brain, and it has the longest intracranial course of any cranial nerves.
Nuclei : In the midbrain of the brainstem.
Location : Superior orbital fissure.
Innervate : The superior oblique muscle of the eye.
Disorder :
Damage to the trochlear nerve (IV) can also cause diplopia with the eye adducted and elevated. The result will be an eye which can not move downwards properly (especially downwards when in an inward position). This is due to impairment in the superior oblique muscle, which is innervated by the trochlear nerve.[1 ]
4th cranial nerve palsy :
Weakness of the nerve is also known as superior oblique
Nuclei : In the midbrain of the brainstem.
Location : Superior orbital fissure.
Innervate : The superior oblique muscle of the eye.
Disorder :
Damage to the trochlear nerve (IV) can also cause diplopia with the eye adducted and elevated. The result will be an eye which can not move downwards properly (especially downwards when in an inward position). This is due to impairment in the superior oblique muscle, which is innervated by the trochlear nerve.[1 ]
4th cranial nerve palsy :
Weakness of the nerve is also known as superior oblique