PT 512 Lecture Notes - Lecture 30: Pharyngeal Plexus Of Vagus Nerve, Inferior Rectus Muscle, Frontal Lobe

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Cranial nerves: general, contain both sensory (afferent) and motor (efferent) axons, both sensory and motor fibers enter and exit brainstem at same site, nuclei are either general or special, somatic or visceral, afferent or efferent. Cribriform plate of ethmoid bone (anterior cranial fossa) Exit orbit via optic canals (middle cranial fossa), fibers cross at optic chiasm, optic tracts to thalamus, optic radiations to primary visual cortex of occipital lobe. Brainstem to orbit through superior orbital fissure (middle cranial fossa) Midbrain (passes anteriorly around brainstem) to orbit through superior orbital fissure (middle cranial fossa) Ophthalmic division-superior orbital fissure; v2 maxillary division foramen rotundum; v3 mandibular division foramen ovale. Motor: superior, medial and inferior rectus muscles; inferior oblique; levator palpebrae superioris. *chief motor nerve to ocular and extraocular muscles* Motor to superior oblique; eye depression and intorsion. Sensory: face, teeth, mouth, nasal cavity, dura mater of cranial cavity. Motor: muscles of mastication, mylohyoid, anterior digastric, tensor veli palatine, tensor tympani.

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