Cranial Nerve

Question 1

Cranial nerve 1-olfactory

Answer 1

olfactory nerve- sense of smell
From cerebrum
Sensory only
Pathology- lack of sense of smell because of head injuries

Question 2

Cranial nerve 2- optic nerve

Answer 2

Optic nerve-comes receptors in retina- goes from front of head to brain from cerebrum
Purely sensory
Carries visual images when they have been changed electrically to the brain
Pathology- sphenoid bone issues cause retinal tumours

Question 3

Cranial Nerve 3- Occulomotor Nerve

Answer 3

Motor, sensory and autonomic from midbrain
Motor- MR, SR,IR, IO AND LP
Autonomic- accommodation, pupil constriction / dilation
pathology, double vision, accommodation loss

Question 4

Cranial Nerve- 4

Answer 4

Trochlear Nerve
from midbrain
Sensory and motor
Sensory- proprioceptors for SO
Motor- innervates SO

Question 5

Cranial Nerve 5-Trigeminal

Answer 5

brainstem
Sensory- facial skin , face 
Motor- chewing eating
Senior pain from face and head motor for chewing 
Trauma- chewing compromised

Question 6

Cranial Nerve 6- Abducens

Answer 6

from brainstem
sensory and motor- provides lateral rectus
pathology- inability to move eye laterally

Question 7

Cranial Nerve 7- Facial

Answer 7

Sensory- taste. buds fron 2/3 , facial muscles
motor- face, neck, scalp
Autonomic- tears and spit production
Pathology- bells palsy- decreased salivation inability to close eye comes from PONS OF BRAINSTEM

Question 8

Cranial Nerve 8- vetsibulochoclear

Answer 8

pons and medulla
Vestibule- balance
Choclear- hearing
vestibular sensory- inner ear, sense of position and movement
Chochlear sensory- hearing
Pathology- trauma- loud noise-hearing loss, tinitis

Question 9

cranial nerve 9- glossopharyngeal

Answer 9

medulla
Tongue taste buds in back1/3/ throat/ swallowing muscles
motor- swallowing muscles
autonomic- salivation
pathology- jugular foramen tumour- absent gag reflex, pain whilst swallowing

Question 10

Cranial nerve 10- Vagus nerve

Answer 10

pons and medulla
sensory- taste buds in throat, neck
motor- coughing, speech , swallowing
autonimic- airways, stomach intestine, digestion heart rate
pathology- tumours laryngeal branch, gag reflex, digestive abnormalities

Question 11

cranial nerve 11- spinal accessory nerve

Answer 11

medulla and spinal cord

control of movement of head and shoulders and head movement

Question 12

-Cranial Nerve 12- hypoglossal nerve

Answer 12

medulla

tongue muscles