Cranial nerves within the tongue

Question 1

What four cranial nerves innovate structures in the tongue

Answer 1

Trigeminal - 5
Facial nerve - 7
Glossopharyngeal - 9
Hypoglossal - 12

Question 2

What is the trigeminal nerve responsible for

Answer 2

General sensation from the anterior 2/3 of the tongue

Question 3

What does the facial nerve do within tongue

Answer 3

Chorda tympani - branch which carries the neurons which are responsible for carrying the specialised sensation of taste from anterior 2/3 of tongue

Question 4

Function of the glossopharyngeal nerve

Answer 4

Responsible for innovation of the posterior third of the tongue
Carries both general and specialised (taste) sensation

SOMETIMES VAGUS INCLUDED (motor)

Responsible for gag reflex/pharyngeal reflex

Question 5

What nerve is responsible for the motor innovation of the tongue

Answer 5

Hypoglossal nerve
(runs under tongue)
Innovates all muscles of tongue except one (palatoglossus nerve-Vagus)