3.1 neuro - cranial nerves Flashcards
Name CN I
olfactory
Name CN II
optic
Name CN III
oculomotor
Name CN IV
trochlear
Name CN V
trigeminal
Name CN VI
abducens
Name CN VII
facial
Name CN VIII
vestibulocochlear
Name CN X
vagus
Name CN IX
glossopharyngeal
Name CN XI
accessory
Name CN XII
hypoglossal
What number cranial nerve is the olfactory
I
What number cranial nerve is the optic
II
What number cranial nerve is the oculomotor
III
What number cranial nerve is the trochlear
IV
What number cranial nerve is the trigeminal
V
What number cranial nerve is the abducens
VI
What number cranial nerve is the vestibulocochlear
VIII
What number cranial nerve is the facial
VII
What number cranial nerve is the vagus
X
What number cranial nerve is the glossopharyngeal
IX
What number cranial nerve is the accessory
XI
What number cranial nerve is the hypoglossal
XII
What is the modality (sensory/motor/mixed) of CN I olfactory
Somatic
What is the modality (sensory/motor/mixed) of CN II optic
Somatic
What is the modality (sensory/motor/mixed) of CN III oculomotor
Motor
What is the modality (sensory/motor/mixed) of CN IV trochlear
Motor
What is the modality (sensory/motor/mixed) of CN V trigeminal
Both
What is the modality (sensory/motor/mixed) of CN VI abducens
Motor
What is the modality (sensory/motor/mixed) of CN VII facial
Both
What is the modality (sensory/motor/mixed) of CN VIII vestibulocochlear
Somatic
What is the modality (sensory/motor/mixed) of CN IX glossopharyngeal
Both
What is the modality (sensory/motor/mixed) of CN X vagus
Both
What is the modality (sensory/motor/mixed) of CN XI accessory
Motor
What is the modality (sensory/motor/mixed) of CN XII hypoglossal
Motor
Name the targets and location of CN I olfactory
sense of smell
extends from olfactory mucosa of nasal cavity to olfactory bulb
neurons of the olfactory bulb project directly to the limbic cortex
Name the targets of CN II optic
vision sense
carries signals from neural retina to thalamus
half the information crosses to the contralateral thalamus and cortex, half projects to the ipsilateral thalamus and cortex
optic nerve > optic chiasm (crossing occurs) > optic tract
Name the targets of CN III oculomotor
somatic, 5 extrinsic eye muscles
- levator palpebrae superioris
- superior rectus
- inferior rectus
- medial rectus
- inferior oblique
parasympathetic (visceral motor), 2 intrinsic eye muscles
- ciliary muscle, allows for accomodation of near vision / changing shape of lense
- sphincter pupillae, constriction of pupil
Name the targets of CN IV trochlear
somatic, 1 extrinsic eye muscle
superior oblique
Name the targets of CN V trigeminal
motor: muscles of mastication
sensory: face and oral cavity (anterior 2/3 of tongue and teeth)
3 branches
- ophthalmic (sensory)
- maxillary (sensory)
- mandibular (sensory and motor)
Name the targets of CN VI abducens
somatic, 1 extrinsic eye muscle
lateral rectus
Name the targets of CN VII facial
parasympathetic (visceral motor): submandibular and sublingual glands, nasal and oral mucosa, lacrimal glands
somatic motor: muscles of facial expression
sensory: taste on anterior 2/3 of the tongue
Name the targets of CN VIII vestibulocochlear
cochlear branch: carries auditory information from the cochlea
vestibular branch: carries information concerning balance from the vestibular apparatus and semicircular canals
Name the targets of CN IX glossopharyngeal
parasympathetic (visceral motor): parotid gland
somatic motor: stylopharyngeus muscle, lifts throat during swallowing
sensory: general sensation and taste on the posterior 1/3 of the tongue
nerve to the carotid body and carotid sinus
Name the targets of CN X vagus
parasympathetic (visceral motor): to thoracic and abdominal viscera, innervates gut to the splenic flexure
somatic motor: constriction of muscles in the pharynx, intrinsic muscles of the larynx
sensory: pharynx and larynx
Name the targets of CN XI accessory
motor: somatic
spinal portion arises in the cervical spinal cord and innervated the sternocleidomastoid and trapezius muscles
Name the targets of CN XII hypoglossal
motor: somatic
intrinsic and extrinsic muscles of the tongue
Where does CN I olfactory connect to the brain stem
it does not
Where does CN II optic connect to the brain stem
it does not
Where does CN III oculomotor connect to the brain stem
midbrain
Where does CN IV trochlear connect to the brain stem
midbrain
Where does CN V trigeminal connect to the brain stem
pons
Where does CN VI abducens connect to the brain stem
pons
Where does CN VII facial connect to the brain stem
pons
Where does CN VIII vistibulocochlear connect to the brain stem
medulla
Where does CN IX glossopharyngeal connect to the brain stem
medulla
Where does CN X vagus connect to the brain stem
medulla
Where does CN XI accessory connect to the brain stem
spinal cord
Where does CN XII hypoglossal connect to the brain stem
medulla