Cranial Nerves

Question 1

What is CN I?

Answer 1

Name: Olfactory Nerve | Origin: Cerebral Hemisphere | Innervates: Nasal cavity | Function: Smell | Type: Sensory

Question 2

What is CN II?

Answer 2

Name: Optic Nerve | Origin: Cerebral Hemisphere | Innervates: Retina of the eye | Function: Vision | Type: Sensory

Question 3

What is CN III?

Answer 3

Name: Oculomotor Nerve | Origin: Midbrain | Innervates: Most eye muscles, levator palpebrae superioris, and pupil sphincter | Function: Eye movement, eyelid elevation, and pupil constriction | Type: Motor

Question 4

What is CN IV?

Answer 4

Name: Trochlear Nerve | Origin: Midbrain | Innervates: Superior oblique muscle of the eye | Function: Eye movement (downward and inward) | Type: Motor

Question 5

What is CN V?

Answer 5

Name: Trigeminal Nerve | Origin: Pons | Innervates: Face, scalp, and muscles of mastication | Function: Sensation in face; chewing movements | Type: Both

Question 6

What is CN VI?

Answer 6

Name: Abducens Nerve | Origin: Pons | Innervates: Lateral rectus muscle of the eye | Function: Eye movement (lateral) | Type: Motor

Question 7

What is CN VII?

Answer 7

Name: Facial Nerve | Origin: Pons | Innervates: Muscles of facial expression, lacrimal and salivary glands | Function: Facial expressions, taste (anterior 2/3 of tongue), salivation, and tear production | Type: Both

Question 8

What is CN VIII?

Answer 8

Name: Vestibulocochlear Nerve | Origin: Pons/Medulla junction | Innervates: Inner ear (cochlea and vestibule) | Function: Hearing and balance | Type: Sensory

Question 9

What is CN IX?

Answer 9

Name: Glossopharyngeal Nerve | Origin: Medulla | Innervates: Pharynx, posterior 1/3 of tongue, and parotid gland | Function: Taste, salivation, and swallowing | Type: Both

Question 10

What is CN X?

Answer 10

Name: Vagus Nerve | Origin: Medulla | Innervates: Pharynx, larynx, thoracic and abdominal organs | Function: Parasympathetic control of the heart, lungs, and digestive tract; speech; and swallowing | Type: Both

Question 11

What is CN XI?

Answer 11

Name: Accessory Nerve | Origin: Medulla | Innervates: Sternocleidomastoid and trapezius muscles | Function: Shoulder and neck movement | Type: Motor

Question 12

What is CN XII?

Answer 12

Name: Hypoglossal Nerve | Origin: Medulla | Innervates: Muscles of the tongue | Function: Tongue movement | Type: Motor