Cranial Nerves W1

Question 1

Where do cranial nerves act?

Answer 1

head and neck

Question 2

where are the cranial nerve nuclei housed?

Answer 2

the nerved enter and exit the brainstem

Question 3

how are the cranial nerves numbered?

Answer 3

I-XII based on location superior to inferior

Question 4

what are the different fibre types in cranial nerves?

Answer 4

sensory afferent, motor efferent

Question 5

which cranial nerves are important for speech, hearing and swallowing?

Answer 5

I, II, V, VII, VIII, IX, X, XI, XII

Question 6

CN names order

Answer 6

OLd OlymPus Tower Fin And German Viewed Some Hops olfactory, optic, trigeminal, facial, auditory vestibular, glossopharyngeal, vagus, spinal accessory, hypoglossal

Question 7

CN function in order

Answer 7

Shes’ Sexy But Brother Says Big Brains Matter More

Question 8

CNI

Answer 8

Olfactory sensory carries information for the sense of smell important for pre-ingestive preparation of eating

Question 9

CNII

Answer 9

Optic sensory carries information for vision important for pre-ingestive preparation for eating important for communication exchange

Question 10

CNV

Answer 10

trigeminal both largest cranial nerve sensory information from face and mouth not taste motor control of chewing muscles three branches - opthalmic s, maxillary s, mandibular b

Question 11

CNVII

Answer 11

facial both taste, facial expression and salivary glands sensory - taste sensation from anterior 2/3 of the tongue. sensory to soft palate and upper pharyngeal wall motor- facial muscles for facial expression, 2 out of 3 salivary glands

Question 12

CNVIII

Answer 12

auditory vestibular sensory also known as acoustic, or vestibulocochlear nerve hearing 2 divisions - cochlear nerve transmits information for perception of sound from cochlea to brain vestibular nerve transmits equilibrium from the vestibular system (semi circular canals) to the brain

Question 13

CNIX

Answer 13

Glossopharyngeal both sensation and taste to back of tongue, one pharyngeal muscle (stylopharyngeus) and saliva sensory - touch, pain and position to upper pharynx, external ear and ear drum, taste and sensation to posterior 1/3 of tongue motor - stylopharyngeus muscle and parotid gland

Question 14

CNX

Answer 14

vagus both many branches ‘wanderer’ close relationship between IX and X for pharynx (pharyngeal plexus) motor - intrinsic and extrinsic laryngeal muscles sensory - larynx, cough response

laryngeal movement

Question 15

CNXI

Answer 15

spinal accessory motor also known as accessory nerve joins with vagus so considered an accessory nerve motor to 2 neck muscles sternocleidomastoid and trapezius

Question 16

CNXII

Answer 16

hypoglossal motor tongue movement under the tongue supplies all intrinsic tongue muscles and all except on of the extrinsic tongue muscles - palatoglossus (pharyngeal plexus)

Question 17

pharyngeal plexus

Answer 17

fibres from CNs IX X (glossopharyngeal and vagus) pharyngeal movement and sensation and velopharyngeal closure - speech and swallowing plays a major role in motor events and sensory feedback during swallowing

Question 18

ansa cervicalis

Answer 18

fibres from the cervical spinal nerves I II some say hypoglossal too infrahyoid muscles and geniohyoid assists in jaw opening and swallowing

Question 19

swallowing central pattern generator

Answer 19

nucleus tractus solitarius - sensory hub, primary sensory nucleus for CN VII IX X nucleus ambiguous - motor hub, primary motor nucleus for CN IX and X

Question 20

Where are the arrows pointing?

Answer 20

top arrow - nucleus ambiguous sensory hub and primary sensory nucleus for CN VII IX X

bottom arrow - nucleus tractus solitarius motor hub and primary motor nucleus for CN IX X

both make up swallowing central pattern generator