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nmdcat.online July 7, 2026

In sensory physiology, the mapping of the body surface in the primary somatosensory cortex is known as the

A. Motor homunculus
B. Sensory homunculus
✓
C. Dermatome map
D. Cortical magnification

📝 Explanation

The sensory homunculus is a distorted topographical map of the body in the postcentral gyrus. Areas with high receptor density (lips, fingers) are represented by much larger areas of the cortex than regions with low density (back).

📖 Additional Information

  • Motor homunculus
  • Sensory homunculus
  • Dermatome map
  • Cortical magnification

The sensory homunculus is a distorted topographical map of the body in the postcentral gyrus. Areas with high receptor density (lips, fingers) are represented by much larger areas of the cortex than regions with low density (back).

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