Studies in thermal sensitivity: 17. The topographical and functional relations of warm and cold.

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Abstract
Seriatim mapping alternately with warm and cold indicates that these are distributed topographically as 2 independent systems. Seriatim mapping simultaneously with warm and cold on adjacent squares shows that warm and cold act functionally as 2 independent systems. The score level for cold is generally unchanged by the simultaneous presence of warmth. The score level for warmth is frequently reduced, but never increased, by the simultaneous presence of cold. This last fact provides evidence against the Alrutz theory of heat, and also against Nafe''s vascular theory of heat as based on the presence of constriction and dilation simultaneously. The lack of topographical correlation likewise speaks against Nafe''s theory; a high correlation is expected if warm and cold were due respectively to dilation and constriction of the same blood vessels.

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