Kiko Klyde

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Homuncular Flexibility: The Human Ability to Inhabit Nonhuman Avatars

ANDREA STEVENSON WON, JEREMY N. BAILENSON, and JARON LANIER

Abstract

This essay seeks to explicate an unorthodox idea that spans psychology, neuroscience, psychology, philosophy, and computer science called homuncular flexibility (HF). HF posits that the homunculus—the part of the cortex that maps movement and sensing of body parts—is capable of adapting to novel bodies, in particular bodies that have extra appendages or appendages capable of atypical movements. Evidence demonstrates neural plasticity in nature; for example, amputees experience cortical shifting such that their face receives extra attention in the brain after a limb is amputated. However, experiments such as the rubber hand illusion, in which people respond to rubber hands placed near their arms as if they were their actual hands, demonstrated that a person’s sense of their body can be adjusted to include external objects.

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