Cranial nerves Flashcards
(19 cards)
What NT is found in many corticobulbar fibers?
Glutamate
What type of nerve is CN I?
Special visceral afferent
What type of nerve is CN II?
Special somatic afferent
What type of nerve is CN III?
General somatic efferent - extraocular muscles
General visceral efferent - intraocular muscles
What type of nerve is CN IV?
General somatic efferent
What type of nerve is CN VI?
General somatic efferent
What are the actions of the inferior oblique extraocular muscle?
Elevation
Abduction
Extorsion
What is the action of the lateral rectus muscle of the eye?
Abduction
What are the action of the superior oblique muscle of the eye?
Depression
Abduction
Intorsion
What are the actions of the superior rectus muscle of the eye?
Elevation
Adduction
Intorsion
What are the actions of the inferior rectus muscle of the eye?
Depression
Adduction
Extorsion
What is the action of the medial rectus muscle?
Adduction
What CN is indicated in Bell’s palsy?
Facial N
What type of nerve is CN IX?
Somatic sensory to posterior tongue, middle ear, and pharynx
Somatic motor to stylopharyngeus muscle
Visceral motor to parotid gland
Special sensory (taste) to posterior tongue
Visceral sensory to carotid body
What two nerves make up the gag reflex?
Afferent - CN IX
Efferent - CN X
What is indicated by deviation of the uvula?
Injury to vagus contralateral to the way the uvula deviates
What CN supplies the external acoustic meatus?
Vagus N
What type of nerve is CN XI?
Somatic motor to SCM and trapezius
What occurs with injury to the hypoglossal N?
Tongue deviates to side of injury
