Hypersensitivity to pain in congenital blindness

Summary: Absence of vision from birth induces a hypersensitivity to painful stimuli, lending new support to a model of sensory integration of vision and pain processing.Abstract: Vision is important for avoiding encounters with objects in the environment that may imperil physical integrity. We tested whether, in the absence of vision, a lower pain threshold would arise from an adaptive shift to other sensory channels. We therefore measured heat and cold pain thresholds and responses to suprathreshold heat stimuli in 2 groups of congenitally blind and matched normal-sighted participants. We also assessed detection thresholds for innocuous warmth and cold, and participants’ attitude toward painful encounters in daily life. Our results show that, compared to sighted subjects, congenitally b…

MedWorm Sponsor Message: Find the best Christmas presents and January Sales in the UK with this simple shopping directory.