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TSM 7
Somatosensation
8
Medical
Undergraduate 2
01/09/2013

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Cards

Term
Why do receptive fields overlap?
Definition
To allow the CNS to determine stimulus position accurately.
Term
Describe the R.F of a second order neurone.
Definition
Central excitatory zone with a surrounding inhibitory zone.
Term
What is the mechanism for 2nd order neurones' receptive fields?
Definition
Lateral inhibition.
Term
What 3 types of organisation are present in the primary somatic sensory cortex?
Definition
1) Somatotopic
2) Modality organisation
3) Columnar organisation.
Term
Where does skin receptor information go to in the PSSC?
Definition
Area 1 and area 3b.
Term
Where does muscle and joint receptor information go to?
Definition
Area 2 and area 3a.
Term
What are the neurons in PSSC area 1 sensitive to?
Definition
Movement direction.
Term
Which 2 areas is the PSSC connected to and what are their functions?
Definition
1) SII cortex: learning new tactile information
2) Posterior parietal cortex: object recognition.
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