Complicated cranial nerves

Question 1

Where is the trigeminal nerve’s sensory cell bodies

Answer 1

In the semilunar ganglion

Question 2

Where does the trigeminal ganglion sit

Answer 2

Meckels cave under the dura in a depression on the petrous part of the temporal bone

Question 3

what are the general affarents for the lacrimal nerve

Answer 3

lacrimal gland

Question 4

general affarents from the forehead, anterior part of the scalp, upper eyelid, and frontal sinus come from the

Answer 4

frontal nerve

Question 5

general affarents from the contents of the orbit, superior part of the nasal cavity, ethmoidal air cells, sphenoidal sinus, dura of the anterior cranial fossa, and superficial sensation from the dorsum of the nose

Answer 5

Nasociliary nerve

Question 6

General affarents from the root of the nose

Answer 6

Infratrochlear nerve

Question 7

what are the general affarents of V1 (opthalmic division) of trigeminal nerve

Answer 7

cornea, lacrimal gland, skin of forehead, scalp, eyelids, nose, superior part of nasal mucosa and paranasal sinuses (except maxillary), dura of anterior and posterior cranial fossae

Question 8

what are the general affarents for V2 of the trigeminal nerve (maxillary division)

Answer 8

skin of face over maxilla, lower eyelid, upper lip, side of nose, maxillary teeth and gingivae, nasal mucosa, nasopharynx, maxillary sinuses, hard and soft palate, dura of middle cranial fossa.

Question 9

Which ganglion is suspended in V2 of trigeminal

Answer 9

Pterygopalatine ganglion
Postganglionic PS: nasal and palatal mucosa, lacrimal gland
Postganglionic S: from ica plexus; same targets

Question 10

what are some branches of the maxillary nerve

Answer 10

zygomatic, which divides into zygomaticotemporal and zygomaticofascial branch

• infraorbital nerve
• greater palatine
• lesser palatine

Question 11

What are the GA of V3 division of trigeminal nerve

Answer 11

skin of mandible, lower lip, side of head, lower teeth and gingivae, TMJ, anterior 2/3 of tongue, floor of mouth, parotid gland, dura of middle cranial fossa

Question 12

What are GE of V3 of trigeminal

Answer 12

muscles of mastication, mylohyoid, anterior belly of digastric, tensor tympani (middle ear), tensor veli palatini

Question 13

What ganglions are suspended in V3 of trigeminal nerve

Answer 13

Otic ganglion: carries postganglionic parasympathetics to parotid gland
Submandibular gland:
-Preganglionic PS: submandibular gland
-Post ganglionic PS: submandibular and sublingual glands.

Question 14

What are special affarent of V3

Answer 14

Taste fibers from anterior 2/3 of tongue

Question 15

What are the general affarents for the fascial nerve

Answer 15

External acoustic meatus and skin of deep part of ear.

Question 16

What are the general efferents of the fascial nerve

Answer 16

muscles of facial expression, stapedius (in middle ear), post belly digastric, stylohyoid

Question 17

What are visceral efferents of facial nerve

Answer 17

mucous glands of nasal cavity, hard and soft palate, submandibular and sublingual glands, lacrimal gland

Question 18

What is a special affarent of the fascial nerve

Answer 18

taste from anterior 2/3 of tongue, palate

Question 19

What are the branches of the fascial nerve within the fascial canal

Answer 19

1. Greater petrosal nerve: carries preganglionic PS fibers for the pterygopalatine ganglion
2. The nerve to stapedius: carrries GE for stapedius muscle
3. chorda tympani: carries preganglionic PS fibers for the submandibular ganglion and special affarent (taste) for anterior 2/3 of tongue.
4. Auricular: Carries general affarent fibers from the EAM and skin of the deep part of the ear.

Question 20

What are the branches of the facial nerve outside the fascial canal

Answer 20

1. Nerve to stylohyoid and posterior belly of digastric (GE)
2. Posterior auricular nerve (GE)
3. Parotid plexus: muscles of facial expression (GE)

Question 21

What are the general affarents of the glossopharyngeal nerve (IX)

Answer 21

1. Posterior 1/3 of tongue, tonsils, oropharynx, middle ear, pharyngotympanic tube, mastoid air cells.

Question 22

What is the general efferent of the glossopharyngeal nerve

Answer 22

Stylopharyngeus muscle

Question 23

What is the visceral affarent of glossopharyngeal nerve

Answer 23

Carotid body and sinus

Question 24

What is visceral efferent of CN IX

Answer 24

parotid gland

Question 25

what is a special affarent of CN IX

Answer 25

taste from posterior 1/3 of tongue

Question 26

What are the branches of CN IX

Answer 26

1. Tympanic nerve: provides GA from mucous membranes of middle ear, mastoid air cells and pharyngotympanic tube. It also carries preganglionic PS axons destined for the otic ganglion. 2. Pharyngeal branches: Carry GA from the mucus membranes of the oropharynx. 3. Carotid sinus branch: Carries visceral affarents from the carotid body and sinus related to blood pressure.

Question 27

What are general affarents of the Vagus nerve

Answer 27

skin of deep part of ear, auditory canal, dura of posterior cranial fossa, mucosa of larynx and laryngopharynx.

Question 28

What are general efferents of vagus nerve

Answer 28

levator veli palatini, salpingopharyngeus, cricothyroid, transverse and oblique arytenoid, vocalis

Question 29

What are visceral affarents of vagus nerve

Answer 29

carotid body and carotid sinus (aortic arch, thoracic and abdominal viscera).

Question 30

What are visceral efferents of vagus nerve

Answer 30

mucosal glands of larynx and laryngopharynx, thoracic and abdominal viscera.

Question 31

what is a special affarent of vagus nerve

Answer 31

taste from epiglottis

Question 32

what are branches of the vagus nerve that are within the jugular foramen

Answer 32

1. meningeal branch: Carries GA from the dura of the posterior cranial fossa 2. Auricular branch: Carries GA from the skin of the deep part of the ear and EAM.

Question 33

What are branches of the vagus nerve that are within the neck:

Answer 33

1. Pharyngeal branches: Provides GE to most of muscles in pharynx and soft palate, also provides preganglionic PS fibers to the mucous membranes of the pharynx and soft palate. 2. Carotid body branch: Conveys VA that has info about blood pressure (from the carotid sinus) and the partial pressure o oxygen and CO2 in the blood. 3. Internal laryngeal branch: GA form the superior part of the larynx and also supplies VE to mucous membranes of the superior part of larynx and SA from the epiglottis. 4. External laryngeal branch: passes inferiorly and provides general efferents to the cricothyroid and the inferior pharyngeal constrictor muscles. 5. Cardiac branches: Supply preganglionic PS innervation to the cardiac plexus.