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CRANIAL NERVES
Components, functions, and foramina
| Question | Answer |
|---|---|
| What are the sensory cranial nerves? | Olfactory (CN I), Optic (CN II), and Vestibulocochlear (CN VIII) |
| What are the motor cranial nerves? | Oculomotor (CN III), Trochlear (CN IV), Abducent (CN VI), Accessory (CN XI), and Hypoglossal (CN XII) |
| What are the mixed cranial nerves? | Trigeminal (CN V), Facial (CN VII), Glossopharyngeal (CN IX), and Vagus (CN X) |
| Function: smell | Olfactory (CN I) |
| Function: Vision | Optic (CN II) |
| cranial nerve in openings in cribriform plate of ethmoid | Olfactory (CN I) |
| cranial nerve in optic canal | Optic (CN II) |
| It lifts upper eyelid; turns eyeball upward, downward, and medially; constricts pupil and accommodates eye | Oculomotor (CN III) |
| Cranial nerve/s in superior orbital fissure | Oculomotor (CN III), Trochlear (CN IV), Trigeminal (CN V); Ophthalmic division, and Abducent (CN VI) |
| Cornea, skin if forehead, scalp, eyelids, and nose; also mucous membrane of paranasal sinuses and nasal cavity | Trigeminal (CN V); Ophthalmic division |
| Assists in turning eyeball downward and laterally | Trochlear (CN IV) |
| Skin of face over maxilla and upper lip, teeth of upper jaw, maxillary air sinus, palate | Trigeminal (CN V); Maxillary division |
| Muscles of mastication, skin of cheek, skin over mandible, lower lip and side of head, TMJ | Trigeminal (CN V); Mandibular division |
| Lateral rectus muscle, and turns eyeball laterally | Abducent (CN VI) |
| Muscles of the face, cheek and scalp, stapedius, taste from anterior 2/3 of tongue | Facial (CN VII) |
| Cranial nerve in internal acoustic meatus, facial canal, stylomastoid foramen | Facial (CN VII) |
| It balances the sensations | Vestibulocochlear (CN VIII) |
| Cranial nerve in internal acoustic meatus | Vestibulocochlear (CN VIII) |
| It assists in swallowing, general sensation, and taste from posterior 3rd o tongue and pharynx | Glossopharyngeal (CN IX) |
| Cranial nerve in jugular foramen | Glossopharyngeal (CN IX) |
| Constrictor muscles of pharynx and intrinsic muscles of larynx, involuntary muscles of trachea and bronchi, heart, alimentary tract, liver and pancreas, taste from epiglottis and afferent fibers of structures aforementioned | Vagus (CN X) |
| Cranial nerve in jugular foramen | Vagus (CN X) |
| Cranial root: muscles of soft palate, pharynx, and larynx Spinal root: SCM and Trapezius muscles | Accessory (CN XI) |
| Cranial nerve in jugular foramen and foramen magnum | Accessory (CN XI) |
| Muscles of tongue controlling its shape and movement | Hypoglossal (CN XII) |
| Cranial nerve in hypoglossal canal | Hypoglossal (CN XII) |
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alssndr
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