Sensory Pathways (Lecture #10) Flashcards Preview

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Flashcards in Sensory Pathways (Lecture #10) Deck (27):
1

what happens if Dorsal Column Medial Lemniscal Pathway is interrupted

los of vibration and proprioception (touch)

2

what happens if Spinothalamic portion of anterolateral pathway is interrupted

loss of pain and temp (touch)

3

where in the spinal cord does the lateral corticospinal tract travel?

lateral

4

where in the spinal cord does the dorsal column medial lemniscal pathway travel

dorsal

5

where in the spinal cord does the spinothalamic portion of the anterolateral pathway travel?

anterior/lateral

6

central cord syndrome will damage axons in what pathway

spinothalamic portion of anterolateral pathway

7

central cord syndrome will cause what kind of sensory loss?

loss of pain and touch in dermatomes

8

how can you tell which side the lesion is on in a hemicord lesion?

lesion is on the side that has vibration loss

9

What will a lesion of lateral aspect of medulla cause?

-loss of pain sensation on face ipsilaterally
-loss of pain and temperature on body contralaterally

10

Distal symmetric polyneuropathy

-small unmylenated axons that convey pain are damaged/destroyed
-typically caused by diabetes

11

effects of hemicord lesion

-loss of motor function and vibration/proprioception ipsilaterally below level of lesion
-loss of pain and temperature contralaterally below level of lesion

12

effects of posterior cord syndrome

loss of vibration and proprioception bilaterally below level of lesion

13

effects of central cord syndrome

loss of pain and temperature bilaterally only at levels of lesion "suspended sensory loss"

14

effects of anterior cord syndrome

-loss of pain and temperature below level of lesion
-LMN weakness of muscles at level of lesion
-UMN weakness below level of lesion (with larger lesion)

15

effects of damage to thalamus/thalamosensory radiations

-contralateral face, arm, and leg sensory loss contralaterally

16

effects of damage to somatosensory cortex

contralateral face, arm, and leg sensory loss

17

which vertebrae are most likely to be involved with cancers metastasizing to the spine

thoracic (vertebral body)

18

transverse myelitis

autoimmune disease that causes swelling in spinal cord; disrupts function of spinal cord and often causes demylination and necrosis of nerve cells

19

spinal shock

Happens initially after spinal cord lesion
-flaccid paralysis below spinal cord lesions
-loss of reflexes
-loss of sympathetic outflow below level of lesion
-bladder loses ability to contract
-fxn can come back

20

paresthesias

abnormal positive sensory symptoms caused by problems in the somatosensory pathways

21

dysesthesia

unpleasant abnormal sensation

22

allodynia

painful sensations provoked by nonpainful stimuli

23

hyperpathia

excruciating pain with minor painful stimuli

24

types of cortical sensations

graphesthesia
stereognosis
tactile extinction

25

graphesthesia

"write" on hand and can tell what was written

26

stereognosis

can tell what something is by feeling it

27

tactile extinction

can't tell when both sides of body are being touched at same time
-indicates problem in primary association cortex