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NAB > 2d. Spinal Reflexes > Flashcards

2d. Spinal Reflexes Flashcards

1
Q

Patella Reflex

- Neurones

A

Tapping of the short patella tendon.

Sensory neurones to the spinal cord

Motor neurones to the quadriceps muscle

Sensory neurone also activates inhibitory interneurones that innervate the hamstrings = relaxation

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2
Q

Patella Reflex

- Nerve

A

Femoral nerve arising from L4-6

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3
Q

Patella Reflex

- Function

A

Support the body when weight is applied to the left

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4
Q

Calcanean Reflex

- Neurones

A

Tapping of the Achilles tendon

Sensory neurones to the spinal cord

Motor neurones to gastrocnemius = contraction

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5
Q

Calcanean Reflex

- Nerve

A

Tibial nerve arising from L6-S2

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6
Q

Biceps Reflex

- Neurones

A

Tapping the tendon of insertion of the biceps brachii

Sensory neurones to the spinal cord

Motor neurones to biceps brachii = contraction

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7
Q

Biceps Reflex

- Nerve

A

Musculocutaneous nerve

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8
Q

Triceps Reflex

- Neurones

A

Tapping the tendon of insertion of the triceps

Sensory neurones to the spinal cord

Motor neurones to triceps = contraction

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9
Q

Triceps Reflex

- Nerve

A

Radial nerve

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10
Q

Tendon Reflexes

- 4

A
  • Patella reflex
  • Calcanean reflex
  • Biceps reflex
  • Triceps reflex
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11
Q

Panniculus Reflex

- Neurones

A

Scratching the trunk

Sensory neurones to spinal cord

Motor neurones to the panniculus muscle = contraction

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12
Q

Panniculus Reflex

- Nerves

A

Sensory branch in segmental nerves arising from T1-L1

Motor branch is lateral thoracic nerve arising from C8-T1

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13
Q

Panniculus Reflex

- Function

A

Expel flies from the skin

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14
Q

Anal Reflex

- Neurones

A

Touching anus

Sensory neurones to spinal cord

Motor neurones to anus = contraction

Motor neurones to tail = contraction and lowering

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15
Q

Anal Reflex

- Nerves

A

Sensory branch in pudendal nerve arising from S1-S3

Motor branch to anus arises from S1-3

Motor branch to tail in caudal nerve roots

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16
Q

Flexor/Withdraw Reflex

- Neurones

A

Pinching one of the digits

Sensory neurone to spinal cord

Motor neurones to flexor muscles = contraction and limb flexion

17
Q

Flexor/Withdraw Reflex

- Function

A

Withdraw limb from pain

Does not mean that the animal is conscious of pain

18
Q

Crossed Extensors Reflex

- Neurones

A

Pinching one of the digits

Sensory neurone to spinal cord

Interneurones cross to the contralateral side

Motor neurones to extensors =

19
Q

Crossed Extensor Reflex

- Function

A

Pain in the digits triggers extension of the contralateral limb to support the body when the affected limb is withdrawn from the painful stimulus.

Does not occur in normal recumbent animals

NAB (37 decks)

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