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Related to trochlear nucleus: trigeminal
nu·cle·us of troch·le·ar nerve
a group of motor neurons innervating the superior oblique muscle of the contralateral eye. The nucleus lies in the caudal half of the midbrain, behind the oculomotor nucleus, in the most ventral part of the central gray substance, near the midline.
A nucleus of the somatic motor column in the hindbrain. It is a small midbrain nucleus sitting atop the MLF just caudal to the oculomotor nucleus, and it is the origin of the trochlear nerve (CN VI).
See also: nucleus