TB10 B&B Lecture 4; Can we identify general principles governing the organisation of function in the brain?

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  • Created by: mint75
  • Created on: 23-05-16 16:12

1. In the motor cortex...?

  • Effectors which are subject to fine motor control e.g tongue, lips, hands, are allocated more space in the cortical map
  • Body parts which are more densly arrayed with receptors e.g hands are afforded more space than less sensitive regions e.g shoulder
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2. When Penfield induced muscle contractions via stimulation the motor cortex, where was this motor map found?

  • Infront of the central sulcus
  • Behind the central sulcus
  • Above the central sulcus
  • Below the central sulcus

3. "Systematic mapping between areas of the visual field and areas of the cortex/other brain regions"...?

  • Cortical mapping
  • Tonotopy
  • Retinotopy
  • Ocular dominance

4. Are maps only restricted to primary cortices?

  • No, they are just harder to find as neurons past the cortex dont respond to simple/motor variables. Their responses can be hard to pinpoint
  • Yes. as these receive the main inputs from the basic senses and so have well defined maps

5. What is meant by a self organising map?

  • After weight updating from competitive learning, neighboruing neurons also update. The physical layout of the network affects learning
  • After weight updating from supervised learning, neighboruing neurons also update. The physical layout of the network affects learning
  • After weight updating from unsupervised learning, neighboruing neurons also update. The physical layout of the network affects learning
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