Cranial Nerves

Question 1

What are the modalities of the nerves

Answer 1

Some 
Say 
Marry 
Money 
But 
My
Brother
 Sas 
Big 
Brains 
Matter
More

Question 2

What are the functions of the olfactory nerves

Answer 2

Olfaction - smell

Special sensory

Question 3

What does the olfactory nerve innervate

Answer 3

Olfactory epithelia

Question 4

What are the function of the optic nerve

Answer 4

Special sensory

Vision

Question 5

What dos the optic nerve innervate

Answer 5

The retina

Question 6

What is the motor aspect of the oculomotor nerve innervate and do

Answer 6

Most of the extraocular
Except lateral rectus or superior oblique
Movement of eyeball

Question 7

What is the parasympathetic contribution of the oculomotor nerve

Answer 7

Pupillary constrictor
Ciliary muscle of the eyeball
Which are both innervated by the ciliary ganglion

Question 8

What does the trochlear nerve do

Answer 8

Motor innervation to the superior oblique extraocular muscle

Question 9

What is the sensory contribution of the trigeminal nerve

Answer 9

Face 
Scalp
Conrea
Nasal and oral cavities 
Cranial dura mater 

General sensation

Question 10

What si the motor aspect of the trigeminal

Answer 10

Muscles of mastication - opening and closing mouth

Tensor tympani muscle - tension of tymp mem

Question 11

What is the action of the abducens nerve

Answer 11

Motor innervation of lateral rectus movement of he eyeball

Question 12

What’s the sensory aspect of the facial nerve

Answer 12

Special sensory of taste to the anterior 2/3 of tongue via lingual nerve with chorda tympani

Question 13

What’s the Motor aspect of the facial nerve

Answer 13

Muscles of facial expression

Stapedius muscle - tension of ossicles

Question 14

What is the parasympathetic innervation of the facial nerves

Answer 14

Salivary and lacrimal glands via submandibular and pterygopalatine ganglia

Question 15

What’s the function of the vestibulocochlear nerve

Answer 15

Sensory to cochlea (hearing) and vestibular apparatus (balance)

Question 16

Where does the Glossopharyngeal supply sensory innervation to

Answer 16

Eustachian tube middle ear - general sensation
Carotid body and sinus - chemo/baroreception
Pharynx and post 1/3 tongue - taste

Question 17

What’s it eh motor function of the Glossopharyngeal

Answer 17

Stylophafyngeus

Swallowing

Question 18

What’s it eh parasympathetic contribution of the Glossopharyngeal

Answer 18

Salivary glands via otic ganglion

Question 19

What is the vagus sensory innervation

Answer 19

Pharynx larynx oes and external eat - general sensation
Aortic body and arch - chemo/baroreception
Visceral sensation

Question 20

What’s it eh motor function of th vagus

Answer 20

Soft palate, larynx, pharynx upper oes

Allowing speech and swallowing

Question 21

What’s the parasympathetic contribution of the vagus

Answer 21

Control of cardio, RESP and GI systems

Question 22

What does accessory nerve do

Answer 22

Motor innervation to the scm and trapezius allowing movements of the head and neck

Question 23

What does the hypoglossal nerve do

Answer 23

Motor innervation to intrinsic and extrinsic muscles of the tongue Exceot palatoglosses which is innervated by vagus

Question 24

Where do the nerves originate

Answer 24

1,2 --> brain 
3,4 --> midbrain
5 --> pons 
6,7,8 --> junction between pons and medulla
9,10,12 --> medulla 
11 --> spinal cord

Question 25

What are e parasympathetic cranial nerves

Answer 25

3 7 9 10

Question 26

'What are the parasympathetic ganglion go the head and neck

Answer 26

Ciliary Sphenopalatine Su maxillary Otic

Question 27

What does the ciliary ganglion innervate

Answer 27

Sphincter pupillae which contracts the pupil | Ciliary muscles accommodating near vision

Question 28

What does the pterygopalatine ganglion innervate

Answer 28

Secretomotor to lacrimal gland Mucous gland of posterosuoeriorly nasal cav Nasopharynx Palate

Question 29

What does the submandibular ganglion supply

Answer 29

Secretomotor innervation to submandibular and sublingual glands

Question 30

What does the otic ganglion supply

Answer 30

Innervation tot he parotid gland

Question 31

Where si the otic ganglion situated

Answer 31

Under foramen ovale

Question 32

How does the olfactory nerve leave the cranial cavity

Answer 32

Crubiform plate

Question 33

How does the optic nerve leave cranial cav

Answer 33

Optic canal | Optic chiasm cross over of sight to visual cortex

Question 34

How does the oculomotor nerve leave the carnival cav

Answer 34

Pierces dura mater Through cavernous sinus (gets parasymp from Ica in cav sinus) Superior orbital fissure

Question 35

What si the course of the trochlear nerve to leave the cranial cav ee

Answer 35

Subarachnoid space Wall of cav sinus Superior orbital fissure

Question 36

What is the purse for the trigeminal nerve leaving the cranial cavity

Answer 36

``` Pons Middle cranial fossA Opthalmic - sup orbital fissure Maxillary - foramen rotundum Mandibular with motor root - foramen ovale ```

Question 37

Who does the abducens leave the cranial cav

Answer 37

``` Pons Subarachnoid space Dura mater Through cav sinus Superior orbital fissure ```

Question 38

How does the facial nerve exit the cranial cav

Answer 38

pons motor and sensory root, IAM stylomastoid foramen

Question 39

What are the branches of the facial nerve Intracranial Extra cranial

Answer 39

Intracranial - iam --> geniculate ganglion which branches to greater petrosal, nerve to stapedius and chorda tympani - stylomastoid formen Extra cranial - posterior auricular branch - motor root terminating in parotid gland

Question 40

What si the course of the Vestibulochoclear nerve

Answer 40

Vestibular and cochlear fibres aggregate and exit via iam

Question 41

What si the course of the Glossopharyngeal nerve

Answer 41

Leaves cranium via jugular foramen Tympanic nerve arises with sensory and parasymp You panic plexus --> to otic ganglion

Question 42

What si the course of the vagus nerve

Answer 42

Via jugular foramen | Auricular branch

Question 43

What are the branches that arise form the vagus nerve and what do they supply

Answer 43

Pharyngeal branches - motor innervation to most of pharynx and soft palate Sup laryngeal nerve - internal (sensory to laryngopharynx and sup larynx) and external ( Cricothyroid) Recurrent laryngeal nerve - only on right side, hooks under aorta inv intrinsic most larynx

Question 44

What si the course of the accessory nerve

Answer 44

Spinal part - enter cranial cav via formen magnum, meet cranial part and out via jugular foremen Cranial part - medulla, meet Spinla part out via jugular formen

Question 45

What's si the course of the hypoglossal nerve

Answer 45

Out via hypoglossal canal | Association with Ansa cervicalis

Question 46

What sit he Ansa cervicalis

Answer 46

Contribution form branch of hypoglossal Partly cervical plexus C1,2,3 Inv depressors of hyoid - stereo hyoid, omohyoid, sterenothyroid

Question 47

What are the cranial nerves

Answer 47

``` Olfactory Optic Oculomotor Trochlear Turgeminal Abducens Facial Vestibulocochlear Glossopharyngeal Vagus Accessory Hypoglossal ```