week 8

Question 1

afferent nerve for pupillary light reflex

Answer 1

CN II

Question 2

interneuron pupillary light reflex

Answer 2

pretectal nucleus (midbrain)

Question 3

efferent pupillary light reflex

Answer 3

CN III (from PN III in midbrain)

Question 4

efferent organ of pupillary light reflex

Answer 4

constrictor m. of pupil (quick in small animal, slow in large animal)

Question 5

palpebral reflex afferent nerve

Answer 5

CN V

Question 6

palpebral reflex interneuron

Answer 6

nucleus of spinal tract of CN V

Question 7

efferent palpebral reflex

Answer 7

CN VII (medulla)

Question 8

efferent organ of palpebral reflex

Answer 8

orbicularis oculi m.

Question 9

corneal reflex afferent nerve

Answer 9

CN V

Question 10

corneal reflex interneuron

Answer 10

nucleus of spinal tract of CN V

Question 11

Corneal reflex efferent nerve

Answer 11

CN VII

Question 12

menace response afferent nerve

Answer 12

CN II, follows pathway to forebrain

Question 13

menace response interneuron

Answer 13

a lot of interneurons (exchange between CN II and III)

Question 14

menace response efferent nerve

Answer 14

CN VII

Question 15

menace response effector organ

Answer 15

Orbicularis oculi m.

Question 16

menace response is absent in what animals

Answer 16

dogs and cats under 8 weeks and foals under 12 weeks

Question 17

gag reflex afferent nerve

Answer 17

CNN IX and X by oral or external massage

Question 18

gag relfex interneuron

Answer 18

exchange interneurons in medulla

Question 19

gag reflex efferent nerve

Answer 19

CN IX and X; also CN XII phrenic nerve involved

Question 20

oculocephalic reflex afferent nerve

Answer 20

CN VIII

Question 21

oculocephalic reflex interneuron

Answer 21

vestibular trigone into medulla (MLF)

Question 22

oculocephalic reflex efferent nerve

Answer 22

CN III, IV, VI (noraml vestibular nistagmus)

Question 23

oculocephalic reflex is useful when evaluating

Answer 23

acute head trauma (with PLR)

Question 24

Trigeminofacial reflex afferent nerve

Answer 24

CN V (touch side of nose, face; flick tactile hairs; inner nose touch hemostats)

Question 25

trigeminofacial reflex interneuron

Answer 25

pons and medulla

Question 26

trigeminofacial reflex efferent nerve

Answer 26

CN VII

Question 27

thoracolaryngeal reflex (slap test) method

Answer 27

during expiration, gently slap just caudal to withers; brief adduction of controlateral arytenoid cartilage;
direct observation (endoscope) or via palpation (muscular process)

Question 28

thoracolaryngeal reflex afferent nerve

Answer 28

dorsal branches of thoracic spinal nn.

Question 29

thoracolaryngeal reflex interneuron

Answer 29

exchange (interneurons) spinal cord to medulla

Question 30

thoracolaryngeal reflex efferent nerve

Answer 30

CN X

Question 31

thoracolaryngeal reflex effector organ

Answer 31

cricoarytenoideus lateralis

Question 32

dazzle reflex afferent nerve

Answer 32

CN II

Question 33

dazzle reflex interneuron

Answer 33

tectospinal tract (midbrain to cervical cord)

Question 34

dazzle reflex efferent nerve

Answer 34

cervical cord LMNs and CN VII (medulla)