Cranial Nerves

Question 1

*Disclaimer, these cards don’t contain all the info on the cranial nerves, only the general function as it pertains to speech/swallowing**

Answer 1

Cool!

Question 2

What is the function of CN V?

Answer 2

• Motor innervation of muscles of mastication (masseter and temporalis and lateral pterygoid)
• Sensation from mucous membranes of mouth, palate, nasopharynx, teeth, face, lower jaw and anterior 2/3 of tongue (not taste)

Question 3

What is the function of CN VII?

Answer 3

• Motor innervation of muscles of facial expression and stapedius muscle
• Innervation of sublingual and submandibular glands
• Taste on anterior 2/3 of tongue

Question 4

What is the function of CN IX

Answer 4

• Motor: elevates larynx, pharynx. Innervates stylopharyngeus, and upper pharyngeal constrictors - involved in swallowing
• Sensation from pharynx, tongue (taste) and Eustachian tube

Question 5

What is the function of CN X?

Answer 5

• Motor: Primarily responsible for pharyngeal constriction, and elevation of soft palate (speech and swallowing). All intrinsic laryngeal muscles except CT.
• Sensory: transmits info from above structures

Question 6

What is the function of CN XII?

Answer 6

Motor: innervates all intrinsic and extrinsic muscles of the tongue (except palatoglossus)