week 5 quiz

Question 1

what is the visual representation of the cervical spine section?

Answer 1

large, oval, large amount of white matter

Question 2

what is the visual representation of the lumbar spinal cord section?

Answer 2

round, large, most amount of gray matter

Question 3

what visually represents the thoracic spinal cord section?

Answer 3

oval, but smaller, lateral horn for ANS, cell bodies for sympathetic nervous system

Question 4

what is the visual representation of the sacral spinal cord section?

Answer 4

similar appearance to lumbar, but smaller

Question 5

What is the dorsal ramus?

Answer 5

contains somatic and visceral motor fibers and innervates the back

Question 6

what is the function of the dorsal column/medial lemniscus in the somatosensory pathway?

Answer 6

discriminative touch/pressure/vibration and proprioception

Question 6

what is the receptor for touch/proprioception?

Answer 6

mechanoreceptors-encapsulated nerve endings sensitive to mechanical stimulation

Question 7

what is the ventral ramus?

Answer 7

larger branch that innervates ventrolateral structures and limbs, contributes too plexuses

Question 8

In the Dorsal column/medial lemniscus pathway, what is the pathway for the 1st order neuron?

Answer 8

mechanoreceptor->peripheral nerve->spinal nerve->dorsal root->dorsal column-fasiculus cuneatus/gracilis->dorsal column nucleii-nucleii cuneatus/gracilis SYNAPSE

Question 9

In the Dorsal column/medial lemniscus pathway, what is the pathway for the 2nd order neuron?

Answer 9

dorsal column nucleii-nucleus gracilis/cuneatus->internal arcuate fibers->DECUSSATION->medial lemniscus->thalamus->SYNAPSE

Question 10

In the Dorsal column/medial lemniscus pathway, what is the pathway for the 3rd order neuron?

Answer 10

thalamus->internal capsule->primary somatosensory cortex

Question 11

what is the function of the white matter columns of the spinal cord?

Answer 11

transmission of neural impulses along axons.

Question 12

what is the function of the dorsal column-medial lemniscal pathway?

Answer 12

somatosensation of discrimitive touch, proprioception, vibration

Question 13

where does the dorsal column-medial lemniscal pathway cross?

Answer 13

internal arcuate fibers in the medulla

Question 14

what type of receptors are involved in the dorsal column-medial lemniscal pathway?

Answer 14

mechanoreceptors

Question 15

How does the area of somatosensory cortex homunculus correspond to density of receptors in a given body area?

Answer 15

Increased density of the somatic receptors corresponds to the representative area of cortex.

Question 16

what is the function of the spinothalamic pathway?

Answer 16

pain and temperature

Question 17

where does the spinothalamic pathway cross?

Answer 17

spinal segment anterior commisure

Question 18

what type of receptors are in the spinothalamic system?

Answer 18

nocioreceptors

Question 19

pathway of first order neuron of spinothalamic

Answer 19

Receptor->peripheral nerve->dorsal root->dorsal horn->synapse

Question 20

pathway of 3rd order neuron in spinothalamic tract

Answer 20

thalamus->internal capsule->primary somatosensory cortex

Question 21

pathway of second order neuron

Answer 21

dorsal horn->ventral commissure->decussation->anterolateral tract->thalmus->synapse