title: Cortical response to a tactile stimulus during attention, mental arithmetic and free associations.
mesh_terms: D000293:Adolescent; D000328:Adult; D001244:Association; D001288:Attention; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D011340:Problem Solving; D014110:Touch; D014427:Twins