Exam 2 Material (cranial Nerves) Flashcards
On Occasion Our Trusty Truck Acts Funny Very Good Vehicle Any How
- Olfactory
- Optic
- Oculomotor
- Trochlear
- Trigeminal
- Abducens
- Facial
- Vestibulocochlear
- Glossopharyngeal
- Vagus
- Spinal Accessory
- Hypoglossal
CN 1 exits skull through?
Cribriform plate
CN 2 exits through?
Optic canal
CN 3, 4, 6 and 5 V1 exit through?
Superior orbital fissure
CN 5 V2 exits through?
Foramen rotundum
CN 5 V3 exits through?
Foramen ovale
CN 7 and 8 exit through?
Internal auditory canal/acoustic meatus
CN 9,10,11 exit through?
Jugular foramen
CN 12 exits through
Hypoglossal canal
The brainstem consists of what 3 things?
The bulb consists of what 2 things?
Midbrain, pons, medulla
Pons and medulla
The _________ tract connects the motor cortex with the brainstem motor nuclei neurons via the ____ of the internal capsule.
Corticobulbar
Genu (knee)
______ palsy is a flaccid paralysis of the LMN units of any or all of the cranial nerves.
Bulbar palsy
______ _______ generally refers to signs and symptoms of bilateral impairment of the lower cranial nerve motor neurons (CN 9, 10, 11, 12) causing difficulty chewing, swallowing, regurg, choking, slurred speech,weakness of the soft palate, and absent gag reflex.
Bulbar palsy
_______ _______ is a similar syndrome secondary to an UMN lesion ( ie: hemorrhage or infarction of the cortex or upper motor pathway in the internal capsule)
Pseudobulbar palsy
Generally, the corticobulbar tracts innervate the ______ and ______ cranial nerve nuclei.
Ipsilateral
Contralateral
_____ and _____ are projected to the contralateral cerebral cortex.
Pain and temp
____ and ____ are projected bilaterally to both the contralateral and ipsilateral cerebral cortices.
Pressure and touch
Cavernous sinus:
top to bottom OTOM
medial to lateral CAT
Oculomotor 3
Trochlear 4
Ophthalmic 5 V1
Maxillary 5 V2
Internal Carotid artery
Abducens
Trochlear/Trigem
parasympathetic components of CN
(Remember, the parasympathetic CN’s are 3, 7, 9, 10)
CN 2, 3 pathway and PSNS function
Light enters eye: CN 2
Midbrain (Edinger-Westphal nucleus)>ciliary ganglion>eye>pupil constriction through ciliary body
CN 7 PSNS pathways
CN 7
Pons>Pterygopalatine ganglion>lacrimal gland and nasal gland>tears and mucus
Pons>submandibular ganglion>submandibular and sublingual glands>salivation
CN 9 PSNS pathway
CN 9:
Medulla>otic ganglion>parotid gland>salivation
CN 10 pathways
CN 10:
No ganglion>directly innervate effector organs
Heart: slows HR, decreases contraction
Bronchial: bronchoconstricts
Stomach/small intestine/large intestine: digestion, increased blood flow and motility
Sympathetic components of the cranial nerves
Eye
Eyelid
Facial skin
Eye: pupil dilation (mydriasis) of Iris through dilator pupilae
Eyelid: retraction of eyelid through levator palpebrae superioris muscle
Facial skin: sweat glands of face
CN 1 enters nose through what plate of what bone?
Cribriform plate
Ethmoid
CN 2 optic serves as ____ limb of pupillary light reflex and ______.
Afferent
Accommodation
CN 2 pupillary light reflex and accommodation are via the ______-_______ ________ in the midbrain
Edinger-westphal nucleus