Cranial Nerve V

Question 1

Name the nerve contributing to the indicated sensory patterns. What divisions should we pay close attension to?

Answer 1

Eye, mouth, ear, nose, and chin

Question 2

Name the parts of the cavernous sinus. Which beanches of the trigeminal nerve pass throuhg the cavernous sinus?

Answer 2

V1 and V2 pass through the cavernous sinus

Question 3

Name the branches of the opthalmic nerve

Answer 3

Question 4

What nerve provides the parasympathetic innercation that follows the short cilliary nerve? In which ganglion does it synapse?

Answer 4

V3

the Ciliary ganclion

Question 5

Name the indicated branches of hte opthalmic nerve

Answer 5

Question 6

Identify the branches of the nasocilliary nerve?

Answer 6

Question 7

Identify the nerves providing sensory innervation surrounding the eye

Answer 7

Question 8

What cranial foramen does the maxillary (V2) pass through?

Answer 8

Foramen rotundum

Question 9

Identify the branches of the maxillary nerve

Answer 9

Question 10

What distribution of the nasal cavity is sensation provided by V1? V2?

Answer 10

V1: anterior and superior

V2: inferior and posterior

Question 12

Describe what is innervated by the greater and lesser palatine nerves

Answer 12

Greater: Hard palate

Lesser: posterior soft palate and uvula

Question 13

Where does sensation come from for the anterior 2/3 of the tongue? Taste?

Answer 13

Sensation: Lingual nerve

Taste: Chorda Typmapii

Question 14

In addition to the muscles of mastication, what two muscles are innercated by the mandibular nerve?

Answer 14

tensor veli palatine and tensor tympani

Question 15

Identify the branches of the mandibular nerve

Answer 15

Question 16

How are sympathetic and parasympathetic innervations provided to the nasal cavity, maxillary sinus, and palate?

Identify the indicated structures

Answer 16

The greater protrosal nerve is composed of preganglionic parasympathetic fibers that leave the facial nerve at the geniculate ganglion and pass anteriorly across the floor of th emiddle cranial fossa. Parasympathetic fibers join postganglionic sympathetic fibers; both autonomic fibers pass through the pterygoid canal and enter the pterygopalatine ganglion

Postganalionic parasympatheric fibers leave the ganglion and pass with all branches of the maxillary nerve to supply mucous glands of the nose and palate

Question 17

How do autonomic fibers reach the lacrimal gland?

Answer 17

Postganglionic parasympathetic fibers from the pterygopalatine ganglion pass in the zygomatic nerve and through a communicating branch to the lacrimal nerve to reach the lacrimal gland

Question 18

How do autonomic fibers reach the submandibular and sublingual glands? What other sensation is provided through fibers that run this route?

Answer 18

• Chorda tympani branches from CN VII in middle ear and enters the infratemporal fossa where it joins the lingual nerver.
• Special sensory (taste) fibers accompany the lingual nerve to synapse on taste receptors in the anterior 2/3 of the tongue
• Preganglionic parasympathetic fibers in chroda tymapni accompany lingual nerve to synapse on postganglionic neurons in the submandibular ganglion. Postganglionic fibers from that ganglion stimulate secretion in submandibular and sublingual salivary glands

Question 19

How do autonomic fibers reach the parotid gland?

Answer 19

• preganglionic parasympathetic fibers in the glossopharyngeal nerve control salivation in the partotid gland. These fibers take a circuitous route to reach their destination.
• As CNIX exits the skull, preganglionic parasympthetic fibers follow the tympanic nerve. They pass superiorly into the middle ear, forming the tympanic plexus on the medial wall of that cavity. They continue through a small opening into the middle cranial fossa and form the lesser petrosal nerve. The lesser petrosal nerve passes anteriorly across the middle cranial fossa and exits the skull through foramen ovale and synapses on the otic ganglion
• Postganglionic fibers leave the otic ganglion and join the auriculotemporal nerve to distribute to the parotid gland.