Allachesthesia

/ˌæləkɛsˈθiːziə/ noun

Definition

A neurological condition where a sensory stimulus on one side of the body is felt on the opposite side.

Etymology

From Greek allos (other) + akhe (pain) + aesthesia (sensation). This medical term was coined in the 19th century to describe a specific neurological symptom.

Kelly Says

Allachesthesia reveals how the brain's sensory map can get crossed—patients touch their left arm but feel it on their right—showing that our sense of where our body is in space is actually constructed by the brain, not a direct fact.

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