Reflexes

Question 1

Definition

Answer 1

Involuntary motor response, almost instanteneus, to a specific stimuli

Question 2

Myotatic reflex sensory propioreceptor

Answer 2

Muscle spindle

Question 3

Golgi tendon senses

Answer 3

Excessive stretching

Question 4

Inverse myotatic reflex sensory propioreceptor

Answer 4

Golgi tendon organ

Question 5

Muscle spindle senses

Answer 5

Muscles fibers stretched

Question 6

First motor neuron disease - reflex is…

Answer 6

Exacerbated

Question 7

Second motor neuron disease - reflex is …

Answer 7

Abolished

Question 8

Bicipital reflex occurs at

Answer 8

C5-C6

Question 9

Effect of bicipital reflex

Answer 9

Subtle arm flexion

Question 10

Supinator / estiloradial reflex occurs at…

Answer 10

C5-C6

Question 11

Effect of supinator reflex

Answer 11

Wrist flexion

Question 12

Tricipital reflex occurs at

Answer 12

C6-C7

Question 13

Effect of tricipital reflex

Answer 13

Subtle arm extension

Question 14

Patellar reflex occurs at

Answer 14

L3, L4

Question 15

Effect of patellar reflex

Answer 15

Extension of the leg

Question 16

Achilles tendon reflex occurs at

Answer 16

L5-S1

Question 17

Effect of Aquiles tendon reflex

Answer 17

Plantarflexion

Question 18

Cutaneous reflexes

Answer 18

Withdrawal reflex
Cutaneous-abdominal reflex
Cremasteric reflex
Cutaneous-plantar reflex

Question 19

Effect of cutaneous plantar reflex

Answer 19

Flexion of all the toes
Physiological in newborns but pathological in adults

Question 20

Effect of cremasteric reflex

Answer 20

Elicited when the inner part of the thigh is stroked. Stroking of the skin causes the cremaster muscle to contract and pull up the ipsilateral testicle toward the inguinal canal

Question 21

Cortico-bulbar reflexes

Answer 21

Pupillary reflex
Menace reflex
Glabelar reflex
Mandibular reflex
Corneal reflex
Snout reflex
Oculovestibular reflex
Startle reflex
Cough reflex
Gag / vomiting reflex

Question 22

Pupilar, glabelar reflexes - nerves involved

Answer 22

CN II (optic) - senses the light
CN III (oculomotor) - dilates/contracts the pupil

Question 23

Mandibular reflex - nerves involved

Answer 23

CN V (trigeminal) - sensory and motor
Only myotatic reflex in the cranial-nerve system

Question 24

Corneal, snout reflexes - nerves involved

Answer 24

Blink reflex

CN V (trigeminal) - afferent fiber
CN VII (facial) - efferent fiber

Question 25

Cough, vomit reflexes - nerves involved

Answer 25

Vomiting CN IX (glossopharingeal) - senses stimuli CN X (vagus) - response

Question 26

How many neurons do we need for a reflex?

Answer 26

2

Question 27

Osteotendinous reflexes

Answer 27

Myotatic reflex Myotatic inverse reflex Contralateral extensor reflex

Question 28

Contralateral extensor reflex

Answer 28

Situation: we are walking and step on something which hurts. We withdraw the limb with the stimulus, but the other limb has to make strong contraction with the extensor muscles, in order to keep balance = contralateral extensor reflex.

Question 29

Myotatic reflex is

Answer 29

Monosynaptic

Question 30

Myotatic inverse reflex is

Answer 30

Polisynaptic

Question 31

Startle reflex - nerves involved

Answer 31

CN VIII (vestibulocochlear)

Question 32

Other reflexes

Answer 32

Palmar - mental reflex Grasping reflex (palmar grasp) - babies Suction reflex - babies

Question 33

Cremasteric effect occurs at

Answer 33

L1-L2

Question 34

Cutaneous plantar reflex occurs at

Answer 34

S1-S2