Tactition

Tactition is the sense of pressure perception. This definition is the one
that differs the most from the Aristotelian model, as it specifically
excludes the perception of pain and temperature (classified separately).
Even within the limited field of "pressure" there is still disagreement as
to how many distinct senses there actually are. In the skin, for example,
there are different receptors responsible for the detection of light against
heavy pressure, as well as brief against sustained pressure. Adding to the
complexity is the fact that there are also distinct receptors that detect
pressure in the visceral organs, such as that caused by a full stomach, and
endocrinal receptors that cause the feeling of "tension", such as that
associated with anxiety or excessive caffeine consumption.

People who are blind or have low vision use a special white cane to feel
obstacles, as well as the curbs when crossing a street, etc.; thus it
"lengthens" one arm.

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