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Cranial Nerve V: The Trigeminal Nerve Stemming from the lateral superior margin of the left and right side of the pons, this nerve branches into three: V/I ophthalmic, V/II maxillary and V/III mandibular nerves. These branches exit the skull through the superior orbital fissure (V/I), the foramen rotundum (V/II) and the foramen ovale (V/III). This nerve governs the sensory innervation of the face, sinuses and teeth.
Arises from the sacral plexus, enters the gluteal region via the greater sciatic foramen below piriformis, supplies skin on the posterior thigh and posterior upper leg including skin over the popliteal fossa. Tibial Nerve and Common Peroneal Nerve. Sacral plexus, tibial L45S123, common peroneal L45S12. Joined initially as the sciatic nerve. Enter the gluteal region via the greater sciatic foramen below piriformis then travel down the thigh deep to the posterior thigh muscles on adductor magnus.