Cranial Nerves and Innervation

Question 1

Cranial Nerve 2 - Function and Category

Answer 1

Function: Vision
Category: Sensory

Question 2

Cranial Nerve 3,4,6 - Function and Category

Answer 2

Function: Eye movements
Category: Motor

Question 3

Cranial Nerve 5 - Function and Category

Answer 3

Function: chewing/facial sensation
Category: sensorimotor

Question 4

Cranial Nerve 7 - Function and Category

Answer 4

Function: facial expression and sensation
Category: sensorimotor

Question 5

Cranial Nerve 8 - Function and Category

Answer 5

Function: hearing and vestibular system
Category: Sensory

Question 6

Cranial Nerve 9 - Function and Category

Answer 6

Function: taste/tongue
Category: Sensorimotor

Question 7

Cranial Nerve 10 - Function and Category

Answer 7

Function: internal organs (cheyne-stokes respiration) (automatic respiration)
Category: Sensorimotor

Question 8

Cranial Nerve 11 - Function and Category

Answer 8

Function: shoulder/neck
Category: motor

Question 9

Cranial Nerve 12 - Function and Category

Answer 9

Function: tongue movement
Category: motor

Question 10

Cranial Nerve 7 - Innervation/Branches (5)

Answer 10

Temporal branches
Zygomatic branches
Buccal branches
Marginal mandibular branches
Cervical branches

Question 11

Blood Supply - Circle of Willis (8)

Answer 11

Internal carotid artery (ICA)
Paravertebral artery (PVA)
Basilar artery
Anterior inferior cerebellary artery (AICA)
Posterior inferior cerebellary artery (PICA)
Anterior cerebral artery (ACA)
Middle cerebral artery (MCA)
Posterior cerebral artery (PCA)

Question 12

ACA Branches (4) and their Function

Answer 12

• Anterior communicating artery: anterior connection to circle of willis.
• Medial lenticulostriate arteries: supplies BN and anterior portion of internal capsule
• Recurrent artery of Heubner: supplies head of caudate and ventral portion of internal capsule
• Pericallosal artery: medial face of cerebral hemisphere

Question 13

MCA Branches (2) and their Functions

Answer 13

Lateral lenticulostriate arteries: supplies caudate, GP, PUT and posterior portion of internal capsule
Cortical segments: supplies aINS and pINS