somatosensory function Flashcards Preview

Y2 LCRS Neuroscience and Mental Health > somatosensory function > Flashcards

Flashcards in somatosensory function Deck (6)
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1
Q

what is two point discrimination

A

minimum distance at which 2 points are perceived as separate

2
Q

what is two point discrimination related to

A

size of receptive field

3
Q

somatosensory dermatomes significance

A

each spinal nerve has specific dermatome on skin, providing mapping system to localise level of sensory innervation perceived on body

4
Q

somatosensory dermatomes: C5, C6, T4, T10

A

C5 clavical, C6 down thumb and index finger, T4 at nipples, T10 at umbilicus

5
Q

what does lateral inhibition do

A

prevents overlap of receptive fields, allowing pinpoint accuracy of localisation of stimulus

6
Q

what mediates lateral inhibition and how

A

inhibitory interneurones within dorsal horn of spinal cord (facilitates enhanced sensory perception (discrimination) due to inhibitory action on adjacent overlapping receptove fields)