Attention-based modulation of tactile stimuli: A comparison between prefrontal lesion patients and healthy age-matched controls

OBJECTIVES: To investigate the role of the prefrontal cortex in attention-based modulation of cortical somatosensory processing. METHODS: Six prefrontal stroke patients were compared with eleven neurologically intact older adults during a vibrotactile discrimination task. All subjects attended to stimuli on one digit while ignoring distracter stimuli on a separate digit of the same hand. Subjects were required to report infrequent targets on …