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The sensory homunculus is arranged disproportionately in the brain to reflect the relative sensitivity and size of different body regions. Areas with higher sensory input, like the hands and mouth, are represented by larger areas in the brain, while less sensitive areas have smaller representation. This arrangement helps prioritize and process sensory information based on its importance for survival and function.

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What is the smallest area on a sensory homunculus?

The smallest area on a sensory homunculus corresponds to the area of the body that has the most precise sensory discrimination, which is typically the fingertips. The homunculus represents the relative sensory perception of different body parts, with the fingers and face occupying a disproportionately large area due to their high density of sensory receptors and the fine-tuned sensitivity they offer. Thus, while the fingertips have the smallest representation in terms of area, they are crucial for detailed tactile perception.


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