A Closer Look at a Projection Map:

• Stimulation studies of Penfield

• The Sensory Homunculus: body surface mapped onto cortical surface (AREA 3)

• Important Principles:

  • the map is orderly
  • somatotopic organization: adjacent body regions are adjacent on the cortex
  • amount of dedicated cortex reflects sensitivity of the body surface

• Motor Homonculus mapped onto Area 4

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