Blocking tactile input to one finger using anaesthetic enhances touch perception and learning in other fingers.

作者: Harriet Dempsey-Jones , Andreas C. Themistocleous , Davide Carone , Tammy W. C. Ng , Vanessa Harrar

DOI: 10.1037/XGE0000514

关键词: Sensory deprivationTouch PerceptionPsychologyPerceptual learningPerceptionSensationTactile perceptionNeuroscienceSensory systemSomatosensory system

摘要: Brain plasticity is a key mechanism for learning and recovery. A striking example of in the adult brain occurs following input loss, example, amputation, whereby deprived zone "invaded" by new representations. Although it has long been assumed that such reorganization leads to functional benefits invading representation, behavioral evidence controversial. Here, we investigate whether temporary period somatosensory loss one finger, induced anesthetic block, sufficient cause improvements touch perception ("direct" effects deafferentation). Further, determine this deprivation can improve enhancing sensory processes, training ("interactive" effects). Importantly, explore direct interactive are dissociable directly comparing their on perception. Using psychophysical thresholds, found brief alone caused tactile finger adjacent blocked but not non-neighboring fingers. Two additional groups underwent minimal either during block neighboring or sham with saline. Deprivation significantly enhanced perceptual training, causing greater transfer compared block. That is, deafferentation gains were seen fingers normally outside boundaries topographic learning. Our results demonstrate abilities, both interactively, when combined This dissociation provides novel opportunities future clinical interventions sensation. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

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