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Anat-Cranial Nerves
| Question | Answer |
|---|---|
| 3 functions of cranial nerves | sensory, motor, parasympathetic |
| sensory function | special (from specialized sense organs [eye, nose, ear, tongue]) or general (from everything else [touch, pain, pressure, temperature]) sensory information input |
| motor function | somatic motor signals to skeletal muscles |
| parasympathetic function | regulation of glands (sweat, saliva, tears), smooth muscles, and cardiac muscles |
| proprioception | positional information of body parts that goes to the cerebellum to coordinate movement |
| direction of cranial nerves | numbered from anterior to posterior |
| other name for vestibulocochlear nerve | auditory nerve |
| other name for accessory nerve | spinal accessory nerve (a portion or all of it may be evolutionarily derived from a spinal nerve |
| cranial nerves (in correct order) | olfactory, optic, oculomotor, trochlear, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, hypoglossal |
| mnemonic aid #1 | on old olympus towering tops a famous vocal german viewed some hops |
| mnemonic aid #2 | oh, once one takes the anatomy final, very good vacations are heavenly! |
| mnemonic aid #3 | old opie occasionally tries trigonometry and feels very gloomy, vague, and hypoactive |
| mnemonic aid for sensory and/or motor functions of cranial nerves | some say marry money but my brother says big business matters more |
| olfactory (I) nerve function | sensory: smell, goes directly to the cerebrum, not through the thalamus |
| optic (II) nerve function | sensory: sight (goes to eyeball) |
| oculomotor (III) nerve function | motor: controls 4 of 6 eye muscles that move the eyeball in the orbit |
| oculomotor (III) location | comes off the anterior side of the pons |
| trochlear (IV) nerve function | motor: controls 1 of the 6 eye muscles |
| trochlear (IV) appearance | thin and thread-like, hard to see |
| trigeminal (V) nerve function | sensory: carries sensory info from the face, nasal cavity, cheeks, lips, oral cavity, skin of the mandible, and surface of the eye |
| abducens (V!) nerve function | motor: goes to the last of the 6 eye muscles |
| abducens (VI) location | between the pons and the medulla |
| facial (VII) nerve function | sensory: carries taste info from the anterior 2/3 of the tongue |
| vestibulocochlear (VIII) nerve function | sensory: carries info on hearing and balance |
| glossopharyngeal (IX) nerve function (1) | sensory: carries info from the posterior 1/3 of tongue (taste), back of mouth, tonsils, and middle ear (where the ossicles are-- monitor the pressure here) |
| glossopharyngeal (IX) nerve function (2) | motor: controls 1 muscle of the pharynx for swallowing |
| vagus (X) nerve function (1) | sensory: carries info from the root of the tongue (taste), back of mouth, pharynx (throat), larynx (voicebox), thoracic, and abdominal organs |
| vagus (X) nerve function (2) | motor: innervates muscles of the larynx and 1 muscle of the tongue |
| vagus (X) nerve location | comes off the side of the medulla |
| accessory (XI) nerve function | motor: goes to the sternocleidomastoid and trapezius |
| hypoglossal (XII) nerve function | motor: controls the tongue and throat muscles (not exactly in the proper numeric sequence) |
Created by:
Jean-O
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