Perception of Tactile Distance on the Back

The perceived distance between two touches is anisotropic on many parts of the body. Generally, tactile distances oriented across body width are as larger than along length, though magnitude such biases differs substantially In this study, we investigated perception back. Participants made verbal estimates pairs either or length (a) left hand, (b) upper back, and (c) lower There were clear anisotropies hand with overestimated relative to those length/height, consistent previous results. On however, an anisotropy in exactly opposite direction was found. These results provide further evidence that vary systematically suggest spatial representation touch back may differ qualitatively from other regions