The video tutorial discusses cranial nerve 3, the oculomotor nerve, focusing on its somatic motor function. It explains the anatomy of the midbrain, highlighting structures like the substantia nigra and red nucleus. The tutorial details the extrinsic eye muscles innervated by the oculomotor nerve, including the medial, superior, and inferior rectus muscles, and the inferior oblique muscle. It also covers the pathway of the oculomotor nerve, its divisions, and its role in controlling eye movements and eyelid elevation.

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