Nerves

Question 1

I Olfactory

Answer 1

Function: Smell Type: Sensory

Question 2

II Optic

Answer 2

Function: Vision Type: Sensory

Question 3

III Oculomotor

Answer 3

Type: Motor Function: Eye muscles, pupil dilation

Question 4

IV Trochlear

Answer 4

Function: eye muscle Type: Motor

Question 5

V Trigeminal

Answer 5

Type: Mixed Function: Face pain, touch, jaw proprioception

Question 6

VI Adbucens

Answer 6

Function: Eye muscle Type: Motor

Question 7

VII Facial

Answer 7

Type: Mixed Function: Facial expression, salivary glands, taste

Question 8

VIII Vestibulocochlear

Answer 8

Function: Hearing, balance/equilibrium Type: Sensory

Question 9

IX Glossopharyngeal

Answer 9

Type: Mixed Function: salivary glands, swallowing, taste

Question 10

X Vagus

Answer 10

Type: Mixed Function: Thorax, abdomen

Question 11

XI Accessory

Answer 11

Function: Trapezius muscle, sternocleidomastoid muscle Type: Motor

Question 12

XII Hypoglossal

Answer 12

Type: Mixed Function: Tongue Muscles

Question 13

Function: Olfaction Type: Sensory

Answer 13

CN I Olfactory Nerve

Question 14

Function: Vision Type: Sensory

Answer 14

CN II Optic Nerve

Question 15

Function: Four extrinsic eye muscles; elevates eyelid Type: Somatic Motor Function: Innervates sphincter pupillae muscle in eye to make pupil constrict; contracts ciliary muscles to make lens of eye more rounded (as needed for near vision) Type: Autonomic

Answer 15

CN III Oculomotor Nerve

Question 16

Function: Superior oblique eye muscle Type: Somatic Motor

Answer 16

CN IV Trochlear Nerve

Question 17

Function: General sensory from anterior scalp, nasal cavity, nasopharynx, entire face, more of oral cavity, teeth, anterior two-thirds of tongue; part of auricle of ear; meninges Type: Sensory Function: Muscles of mastication, mylohyoid, digastric (anterior belly) tensory tympani, tensor veli palatini Type: Somatic Motor

Answer 17

CN V Trigeminal Nerve

Question 18

Function: Lateral rectus of eye Type: Somatic Motor

Answer 18

CN VI Adbucens Nerve

Question 19

Function: Tastes from anterior two-thirds of tongue Type: Sensory Function: Muscles of facial expression, digastric (posterior belly), stylohyloid, stapedius Type: Somatic Motor Function: Increases secretion from lacrimal gland of eye, submandibular and sublingual salivary glands Type: Autonomic

Answer 19

CN VII Facial Nerve

Question 20

Function: Hearing (cochlear branch); equilibrium (vestibular branch) Type: Sensory

Answer 20

CN VIII Vestibulocochlear Nerve

Question 21

Function: General sensory and taste from posterior one-third of tongue, general sensroy from part of pharynx, visceral sensory from carotid bodies Type: Sensory Function: One pharyngeal muscle (stylopharyngeus) Type: Somatic Motor Function: Increases secretion from parotid salivary gland Type: Autonomic

Answer 21

CN IX Glossopharyngeal Nerve

Question 22

Function: Visceral sensory information from heart, lungs, most abdominal organs. General sensory information from external acoustic meatus, tympanic membrane, part of pharynx, laryngopharynx, and larynx Type: Sensory Function: Most pharyngeal muscles; all laryngeal muscles Type: Somatic Motor Function: Innervates smooth muscle and glands of heart, lungs, larynx, trachea, most abdominal organs Type: Autonomic

Answer 22

CN X Vagus Nerve

Question 23

Function: Trapezius muscle, sternocleidomastoid muscle Type: Somatic Motor

Answer 23

CN XI Accessory Nerve

Question 24

Function: Intrinsic and extrinsic tongue muscles Type: Somatic Motor

Answer 24

CN XII Hypoglossal Nerve