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Cranial Nerve

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imissyou419's version from 2016-12-09 04:09

Section 1

Question Answer
Emerge directly off brain and brainstem but still considered _________ from ventral side, except ___parasympathetic nervous system, trochlear nerve emerge from dorsal side
numbered 1-12 from which directionrostral to caudal
which cranial nerve does not innervate the head and neck structures?vagus nerve
Olfactoryafferent information for sense of smell
Opticvision
Oculomotor4 extrinsic eye muscles (medial rectus, superior rectus, inferior obliques, inferior rectus); parasympathetic constricts pupil
When inferior obliques contract, what happens?look up, turns eye more laterally
when inferior rectus contracts, what happens?look down, turn eye more medially
When you cut oculomotor nerve, what happens?no parasympathetic innervation to pupil to cause it to constrict -> mydriasis (pupil dilation)
Trochlearsuperior obliques (when contracted, look down and laterally)
TrigeminalSENSORY: opthalmic (V1) - upper scalp, upper eyelid, nasal region, maxillary (V2) - cheek region, upper lip, lower eyelid, upper teeth, mandibular (V3) - chin, lower cheek, temporal region, anterior 2/3 of tongue
MOTOR - muscles of mastication (temporalis and masseter)
Abducenslacteral rectus (when contracted, look laterally)
FacialSENSORY - taste from anterior 2/3 of tongue,
MOTOR - muscles of facial expression (temporal, zygomatic, buccal, mandibular, cervical), nerve to stapedius muscle in middle ear,
PARASYMPATHETIC - motor innervation to lacrimal and salivary (submandibular and sublingual but NOT parotid gland)
VestibulocochlearSENSORY - balance, hearing
GlossopharyngealSENSORY: pharyngeal mucosa and posterior tongue, taste from posterior 1/3 of tongue
MOTOR: efferent to stylopharyngeus muscle,
PARASYMPATHETIC - motor fibers to salivary (parotid gland), innervate carotid body and cortid sinus,
VagusMotor - pharynx and larynx (swallowing and vocalization), general sensory - larynx, special sensory - taste buds on epiglottis, parasympathetic - heart, lung, gut
AccessoryMOTOR - sternocleidomastoid and trapezius
Hypoglossalextrinic and intrisic muscles of the tongue
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Section 2

Question Answer
Lesion in left optic nerveloss of vision in left eye
Lesion of optic chiasmbitemporal hemianopia (tunnel vision)
Lesion of left optic tractright homonymous hemianopia (loss of RIGHT visual field)
Bouts of facial pain. Unpredictable, sometimes triggered by brushingTrigeminal nerve supplies sensation inside teeth, translates pain of teeth
Patient unable to make facial expression on left side but still able to masticateProblem with facial nerve, trigeminal nerve is normal so can masticate
Hypoglossal nerve palsyunilateral hypoglossla nerve injury
Loss of taste to anterior tongue?Facial nerve
Loss of taste to posterior tongue?Glossopharyngeal nerve
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