Cranial Nerve Anatomy - Trochlear -CN IV 4th Nerve Nucleus
Sagittal :: NOS - Not specified || ACR Codes: 1.1
Diagram of the cranial nerve nuclei, superimposed on an MRI of the brainstem. Named for its function - innervating the superior oblique muscle, which passes through a cartilage sling or pulley ("trochlea" is Latin for pulley).