trochlear nerve(redirected from Trochlear nerve diseases)
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1. pertaining to a trochlea.
2. pertaining to the fourth cranial nerve (trochlear nerve).
trochlear nerve the fourth cranial nerve; it supplies muscle sense and the impulse for movement to the superior oblique muscle of the eyeball. See anatomic Table of Nerves in the Appendices.
Either of the fourth pair of cranial nerves that originates in the midbrain and innervates a muscle of the eyeball.