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Neuro > Reflexes > Flashcards

Reflexes Flashcards

1
Q

Definition

A

Involuntary motor response, almost instanteneus, to a specific stimuli

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2
Q

Myotatic reflex sensory propioreceptor

A

Muscle spindle

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3
Q

Golgi tendon senses

A

Excessive stretching

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4
Q

Inverse myotatic reflex sensory propioreceptor

A

Golgi tendon organ

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5
Q

Muscle spindle senses

A

Muscles fibers stretched

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6
Q

First motor neuron disease - reflex is…

A

Exacerbated

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7
Q

Second motor neuron disease - reflex is …

A

Abolished

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8
Q

Bicipital reflex occurs at

A

C5-C6

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9
Q

Effect of bicipital reflex

A

Subtle arm flexion

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10
Q

Supinator / estiloradial reflex occurs at…

A

C5-C6

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11
Q

Effect of supinator reflex

A

Wrist flexion

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12
Q

Tricipital reflex occurs at

A

C6-C7

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13
Q

Effect of tricipital reflex

A

Subtle arm extension

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14
Q

Patellar reflex occurs at

A

L3, L4

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15
Q

Effect of patellar reflex

A

Extension of the leg

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16
Q

Achilles tendon reflex occurs at

A

L5-S1

17
Q

Effect of Aquiles tendon reflex

A

Plantarflexion

18
Q

Cutaneous reflexes

A

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

19
Q

Effect of cutaneous plantar reflex

A

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

20
Q

Effect of cremasteric reflex

A

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

21
Q

Cortico-bulbar reflexes

A

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

22
Q

Pupilar, glabelar reflexes - nerves involved

A

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

23
Q

Mandibular reflex - nerves involved

A

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

24
Q

Corneal, snout reflexes - nerves involved

A

Blink reflex

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

25
Q

Cough, vomit reflexes - nerves involved

A

Vomiting

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

26
Q

How many neurons do we need for a reflex?

A

2

27
Q

Osteotendinous reflexes

A

Myotatic reflex
Myotatic inverse reflex
Contralateral extensor reflex

28
Q

Contralateral extensor reflex

A

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.

29
Q

Myotatic reflex is

A

Monosynaptic

30
Q

Myotatic inverse reflex is

A

Polisynaptic

31
Q

Startle reflex - nerves involved

A

CN VIII (vestibulocochlear)

32
Q

Other reflexes

A

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

33
Q

Cremasteric effect occurs at

A

L1-L2

34
Q

Cutaneous plantar reflex occurs at

A

S1-S2

Neuro (23 decks)

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