somatosensory function Flashcards Preview

Y2 LCRS Neuroscience and Mental Health > somatosensory function > Flashcards

Flashcards in somatosensory function Deck (10)
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1
Q

in the central pathway, where is somatotropic organisation maintained

A

throughout entire pathway from dermatomes to cortex via dorsal columns/medial lemniscus

2
Q

where does decussation of pathway for information coming from body and head occur

A

in the brainstem

3
Q

what enhances the difference between adjacent inputs

A

lateral inhibition

4
Q

when do touch and proprioceptive stimuli only become a conscious, localised, perceived sensation

A

when they reach the cortex

5
Q

where is primary somatosensory cortex (SI)

A

anterior (rostral) to posterior parietal cortex; postcentral gyrus (posterior to central sulcus)

6
Q

SI: what is the body map distorted according to

A

relative density of inputs from different parts of the body

7
Q

how does response of neurones in SI vary

A

some respond to stimulus properties (e.g. pressure, vibration), some respond to abstract properties (e.g. movement, object shape)

8
Q

where is secondary somatosensory cortex (SII)

A

below (ventral to) SI in centre of brain near temporal lobe

9
Q

what does SII receive and where from

A

intracortical projections from SI

10
Q

what is the function of the posterior parietal cortex, caudal to SI

A

interpretation of spatial relationships