Muscle innervation

Question 1

hyoglossus

Answer 1

motor: CN XII

Question 2

styloglossus

Answer 2

motor: CN XII

Question 3

genioglossus

Answer 3

motor: CN XII

Question 4

palatoglossus

Answer 4

motor: CN X

Question 5

anterior 2/3

Answer 5

sensory: lingual branch of CN V3

special sensory: chorda tympani hitchhikes lingual branch of CN V3

Question 6

posterior 1/3

Answer 6

sensory: CN IX

special sensory: CN IX

Question 7

digastric posterior belly

Answer 7

motor: CN VII

Question 8

digastric anterior belly

Answer 8

motor: nerve to mylohyoid branch of CN V3

Question 9

mylohyoid

Answer 9

motor: nerve to mylohyoid branch of CN V3

Question 10

stylohyoid

Answer 10

motor: CN VII

Question 11

geniohyoid

Answer 11

motor: C1 (ansa cervicalis) hitchhikes CN XII

Question 12

omohyoid superior and inferior belly

Answer 12

motor: ansa cervicalis C1-C3

Question 13

sternohyoid

Answer 13

motor: ansa cervicalis C1-C3

Question 14

thyrohyoid

Answer 14

motor: C1 (ansa cervicalis) hitchhikes CN XII

Question 15

sternothyroid

Answer 15

motor: ansa cervicalis C1-C3

Question 16

scalene (post, mid, ant)

Answer 16

motor: C4-C6

Question 17

sternocleidomastoid

Answer 17

motor: CN XI

Question 18

trapezius

Answer 18

motor: CN XI

Question 19

muscles of mastication

Answer 19

motor: anterior division of CN V3

Question 20

muscles of facial expression

Answer 20

sensory: CN V and great auricular
motor: CN VII

Question 21

lesser occipital nerve

Answer 21

C2 (cervical plexus)

Question 22

great auricular

Answer 22

C2-3 (cervical plexus)

Question 23

transverse cutaneous/ cervical

Answer 23

C2-3 (cervical plexus)

Question 24

supraclavicular

Answer 24

C3-4 (cervical plexus)

Question 25

ansa cervicalis

Answer 25

C1-3 superior root C1 inferior root C2-3 from cervical plexus

Question 26

cervical plexus

Answer 26

C1-4

Question 27

brachial plexus

Answer 27

C5-8 + T1

Question 28

suprahyoid muscles

Answer 28

ant. belly of digastric + mylohyoid = CN V3 nerve to mylohyoid post. belly digastric + stylohyoid = CN VII geniohyoid = C1 hitchhikes CN XII

Question 29

infrahyoid muscles

Answer 29

all ansa cervicalis | except thyrohyoid C1 hitchhikes CN XII

Question 30

tongue papillae

Answer 30

fungiform and filiform papillae = chorda tympani CN VII hitchhikes lingual CN V3 circumvallate papillae = CN IX

Question 31

parotid gland

Answer 31

lesser petrosal CN IX otic ganglion auriculotemporal CN V3

Question 32

submandibular and sublingual gland

Answer 32

chorda tympani CN VII hitchhikes lingual CN V3 | submandibular ganglion

Question 33

minor salivary glands e.g. palatine, mucous, nasal

Answer 33

greater petrosal (CN VII) + deep petrosal (internal carotid plexus) = nerve to pterygoid pterygopalatine ganglion CN V2 branches e.g. nasopalatine, pharyngeal, greater and lesser palatine, posterior superior nasal

Question 34

lacrimal gland

Answer 34

greater petrosal (CN VII) + deep petrosal (internal carotid plexus) = nerve to pterygoid pterygopalatine ganglion zygomatic nerve CN V2 lacrimal nerve CN V1

Question 35

eyelid muscles

Answer 35

levator palpebrae superioris (para) sup. branch occulomotor nerve CN III ciliary ganglion short ciliary nerve superior tarsal (symp) superior cervical ganglion ophthalmic artery of ICA

Question 36

cornea and iris

Answer 36

nasociliary CN V1 passes through cilairy ganglion

Question 37

muscles of soft palate

Answer 37

motor: all (levator veli palatini, palatopharyngeus, palatoglossus, musculus uvula) = CN X pharyngeal branch, except tensor veli palatini = anterior div. CN V3 sensory: lesser palatine nerve CN V2

Question 38

muscles of pharynx

Answer 38

motor: longitudinal muscles (palatopharyngeus, salingopharyngeus) = CN X pharyngeal branch, except stylopharyngeus = CN IX motor: constrictor muscles (sup, mid, inf,) = CN X pharyngeal branch sensory: CN IX

Question 39

hard palate

Answer 39

sensory: greater palatine and nasopalatine CN V2

Question 40

internal laryngeal muscles

Answer 40

motor: all (aryepiglottic, thyroepiglottic, posterior and lateral cricoarytenoid, transverse and oblique interarytenoid, thyroarytenoid, vocalis) = CN X recurrent laryngeal, except cricothyroid = CN X external laryngeal branch of superior laryngeal sensory: supraglottic = CN X internal branch of superior laryngeal, infraglottic = CN X inferior branch of recurrent laryngeal

Question 41

nasal cavity

Answer 41

superior anterior half special sensory: CN I sensory: CN V1 anterior (septal and external nasal) and posterior ethmoid inferior posterior half sensory: CN V2 posterior/ inferior lateral nasal nerve, nasal bracnh of ant. sup. alveolar, internal branch of infraorbital, nasopalatine

Question 42

ear muscles

Answer 42

tensor tympani = tensor tympanic nerve CN V3 | stapedius = nerve to stapedius CN VII

Question 43

ear sensory

Answer 43

``` vagus CN X facial CN VII auriculotemporal CN V3 lesser occipital C2 greater auricular C2-3 ```

Question 44

eye muscles

Answer 44

motor: SO4LR6AO3 superior oblique = trochlear CN IV lateral rectus = abducens CN VI all others = oculomotor CN III sup. branch CN III = SR, levator palpebrae superioris inf. branch CN III = MR, IR, IO, ciliary ganglion