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cranial nuclei
cranial nuclei, location, division, function
| cranial nerve | location | division | function |
|---|---|---|---|
| oculomotor | midbrain (upper) | GSE | muscle to elevate and retract upper eyelid: levator palpebrae superioris; muscles to move eye: inferior rectus, superior rectus, medial rectus, inferior oblique |
| edinger-westphal | midbrain (upper) | GVE | ciliary muscle, focus lens of eye; sphincter pupillae, contract pupil |
| trochlear | midbrain (lower) | GSE | muscle to move eye: superior oblique |
| mesencephalic V | midbrain (lower, upper) | GSA | proprioception to muscles of mastication (Masseter/Temporalis); has pseudounipolar cells in pons |
| abducens | pons (lower) | GSE | muscle to move eye: lateral rectus; lesion=cross eyed; nerve only to come ventrally |
| superior salivatory | pons (lower) | GVE | preganglionic parasympathetic (viseromotor); salivation from sublingual and submandibular glands via submandibular ganglion |
| motor V | pons (upper) | SVE | motor to muscle of mastication |
| motor facial | pons (lower) | SVE | muscles of facial expression; CN VII; fibers curve around abducens nuc. |
| principal sensory V | pons (upper) | GSA | touch from face |
| spinal V (pars oralis) | pons (lower) | GSA | touch/pressure/kinesthetic from face; input from semilunar ganglion; trigeminal nerve (opthalmic/maxillary/mandibular) |
| hypoglossal | medulla (lower,middle) | GSE | motor to tongue; ipsilesional deviation of tongue upon protrusion |
| dorsal motor X | medulla (lower, middle) | GVE | motor to thoracic/abdominal viscera |
| inferior salivatory | medulla (upper) | GVE | preganglionic parasympathetic (viseromotor); salivation from paroid gland via otic ganglion |
| ambiguus | medulla (middle) | SVE | motor to muscles pharynx/larynx; test it by swallowing; output to CN IX,X,XI |
| solitary (gustatory) | medulla (upper) | SVA | sensory from 1) taste buds; 2) thoracic/abdominal viscera |
| solitary (cardiorespiratory) | medulla (lower) | GVA | viserosensory from heart (and other) |
| vestibular (lateral) | pons (lower) | SSA | LATERAL VESTIBULAR NUC.—LATERAL VESTIBULOSPINAL TRACT—UNCROSSED—ENTIRE LENGTH OF CORD—VENTRAL FUNICULUS—PROXIMAL MUSCLES—MAINTAINS BALANCE BY ACTING MAINLY ON LIMBS |
| cochlear | medulla (upper) | SSA | audition |
| spinal V (pars interpolaris, pars caudalis) | medulla (lower, middle, upper) | GSA | pain/temperature from face; continuation of substantia gelatinosa; up to VPMn of thalamus |
| spinal accessory | medulla (lower), cervical spine (upper) | GSE | trapezius posterior, sternocleidomastoid anterior |
| vestibular (medial) | medulla (lower, middle, upper) | SSA | MEDIAL VESTIBULAR NUCLEUS—MEDIAL VESTIBULOSPINAL TRACT—BILATERAL—CERVICAL AND UPPER THORACIC SPINAL CORD ONLY—MAINTAINS HEAD ERECT |
| superior olivary | pons (lower) | sensory | trapezoid body=fibers between sup olivary at junction of tegmentum/ventral pons; related to auditory CN VIII |
| inferior olivary | medulla (upper) | sensory | motor coordination/learning |
| locus ceruleus | pons (upper) | (blank) | supplies norepinephrine; sleep/wakefulness; tiny; dorsal/medial to motor V |
Created by:
rtc
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