Short term plasticity of the primary sensory cortex revealed by interventions contralateral to the stimulus in Median nerve SEP

Long term as well as short term cortical reorganisation of the somatosensory cortex following an alteration of the peripheral sensory input of the stimulated limb is well established. In the present study we aimed to investigate if a temporary deafferentiation of digits contralateral to the stimulus site as well as pain applied to it also results in a modulation of the topic arrangement of the primary sensory cortex revealed by dipole source analysis of the somatosensory evoked potentials (SEP). SEP were recorded following electric stimulation of digit D1 and D5 at the left hand before and after anesthesia was a…