Cranial Nerves

Question 1

cranial nerve 1- Olfactory

Answer 1

• smell
• sensory

Question 2

cranial nerve 2- optic

Answer 2

• vision
• sensory

Question 3

cranial nerve 3- oculomotor

Answer 3

• motor- extraocular mm movement, opening of eyelids
• parasympathetic- pupil constriction, lens shape
• mixed type

Question 4

cranial nerve IV(4)- trochlear

Answer 4

• motor
• down and inward movement of the eye

Question 5

cranial nerve 5 (V)

Answer 5

• Trigeminal
• mixed
• motor= mm of mastrification
• sensory= sensation of the face, scalp, cornea, mucous membranes of mouth and nose

Question 6

cranial nerve 6 (VI)
abducens

Answer 6

• motor
• lateral movement of the eye

Question 7

cranial never 7 (VII)
Facial

Answer 7

• mixed
• motor= facial mm, close eye, labial speech, close mouth
• sensory- taste (sour, salty, sweet, bitter) on anterior 2/3 of tounge
• parasympathetic= saliva and tear secretion

Question 8

cranial nerve 8 (VIII)
Acoustic

Answer 8

• sensory
• hearing and equalibrium

Question 9

cranial nerve 9 (IX)
Glossopharngeal

Answer 9

• mixed
• motor= pharynx (phonation and swollowing)
• sensory= taste on posterior 1/3 of tounge, pharynx (gag relex)
• parasympathetic= parotid gland, carotid reflec

Question 10

cranial nerve X
vagus

Answer 10

• mixed
• motor= pharynx and larynx–> talking & swallowing
• sensory= general sensation from carotid body, carotid siinus, pharynx and viscera
• parasympathetic= carotid reflex

Question 11

cranial nerve (XI)
spinal accessory

Answer 11

• motor
• movement of trapezius and sternomastoid mm

Question 12

cranial nerve (XII)
hypoglossal

Answer 12

• motor
• movement of tounge