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What does it feel like to have too many arms? (Scientific American)

phantom-limbs mind grue cogsci 150 neuroethics

Patients have reported seeing their phantom limb or feeling objects or body parts with it

phantom-limbs brain 150 grue

Phantom limbs, often described after amputation, are also experienced as an extra limb in patients who are paralyzed on one side following a stroke. Referred to as supernumerary phantom limb (SPL), patients can usually perceive these limbs as a vivid somatosensory presence of an extra limb, but generally cannot see or intentionally move them. In some unusual cases, however, patients have reported seeing their phantom limb or feeling objects or body parts with it, which indicates that multiple areas of the brain may be involved in SPLs.

phantom-limbs brains grue AZB cogsci