Central Somatosensory Pathways

Question 1

what are in dorsal columns of spinal cord?

Answer 1

afferent sensory info from periphery

Question 2

Where is upper limb located in dorsal columns versis lower limbs?

Answer 2

lower limbs are more medial

upper limb more lateral

Question 3

3 nerves to get from touch to brain, where does it cross over/decussation?

Answer 3

caudal medulla

Question 4

what other info besides somatosensory during touch?

Answer 4

proprioceptive/cerebellar

Question 5

What is S1 and S2 mean in neuro?

Answer 5

primary somatic sensory cortex

Secondary somatic sensory cortex

Question 6

how many body maps in S1 and S2

Answer 6

S1 - 4

S2 - 2

Question 7

somatosensory cortex distribution even?

Answer 7

Nope, uneven distribution in form of humunculus

Question 8

gracile nucleus has what tracts?

Answer 8

lower limb

Question 9

Cuneate nucleus has what tracts?

Answer 9

upper limb

Question 10

where does touch go after somatosensory cortex?

Answer 10

hippocampus and amygdala for further processing

Question 11

patterns of recognition within sensory cortices example?

Answer 11

rat whiskers have a barrel appearance

Question 12

what happens to somatosensory cortex after finger amputation

Answer 12

the finger that was amputated zone is taken over by adjacent regions

Question 13

somatosensory cortex after repetative behavioural task?

Answer 13

expanded regions in the somatosensory cortex for those stimulated areas

Question 14

Can you get CNS plasticity with erroneous peripheral nerve regen?

Answer 14

Nope.

Question 15

Phantom limbs are what?

Answer 15

after amputation, the patient can still feel the missing limb as though it were a part of them

Question 16

what is the largest dural venous sinus?

Answer 16

superior sagittal sinus

Question 17

falx and tentorium made of what?

Answer 17

dura

Question 18

hindbrain consists of what 3 things?

Answer 18

pons
medulla
cerebellum