P300 generation by novel somatosensory stimuli.

@article{citeulike:277450, abstract = {Event-related potentials (ERPs) to task-relevant target and task-irrelevant novel stimuli were recorded in a somatosensory discrimination task. Subjects pressed a button to mechanical taps of the fifth finger (targets, P = 0.12), randomly interposed in sequences of taps to the second finger (standards, P = 0.76). Two types of infrequent novel stimuli were delivered; one was a mechanical tap to the third or fourth finger (tactile novels, P = 0.06), another was an electric shock at the wrist (shock novels, P = 0.06). Correctly detected targets generated a parietal maximal P300 (P3b, latency 335 msec). Shock novels generated a central maximal P300 with a shorter peak latency (298 msec) than the P3b. Tactile novels generated a P300 with a scalp distribution comparable to the shock novels. Unlike the P3b, P300 amplitude to both the shock and tactile novel stimuli habituated by 20-30\% across the first several stimulus presentations. These results indicate that, similar to the auditory and visual modality, task-irrelevant novel somatosensory stimuli generate a novelty P300 ERP. Differences in scalp distribution, latency and habituation characteristics suggest that the novelty P300 may have contributions from intracranial generators independent from target P300 sources.}, address = {Department of Neurology, University of California, Davis, Veterans Administration Medical Center, Martinez 94553.}, author = {Yamaguchi, S. and Knight, R. T. }, citeulike-article-id = {277450}, issn = {0013-4694}, journal = {Electroencephalogr Clin Neurophysiol}, keywords = {cksearch, p300}, month = {January}, number = {1}, pages = {50--55}, posted-at = {2005-08-09 19:36:05}, priority = {2}, title = {P300 generation by novel somatosensory stimuli.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/1701715}, volume = {78}, year = {1991} }

TY - JOUR ID - citeulike:277450 L3 - citeulike-article-id:277450 TI - P300 generation by novel somatosensory stimuli. JF - Electroencephalogr Clin Neurophysiol VL - 78 IS - 1 SP - 50 EP - 55 AD - Department of Neurology, University of California, Davis, Veterans Administration Medical Center, Martinez 94553. SN - 0013-4694 N2 - Event-related potentials (ERPs) to task-relevant target and task-irrelevant novel stimuli were recorded in a somatosensory discrimination task. Subjects pressed a button to mechanical taps of the fifth finger (targets, P = 0.12), randomly interposed in sequences of taps to the second finger (standards, P = 0.76). Two types of infrequent novel stimuli were delivered; one was a mechanical tap to the third or fourth finger (tactile novels, P = 0.06), another was an electric shock at the wrist (shock novels, P = 0.06). Correctly detected targets generated a parietal maximal P300 (P3b, latency 335 msec). Shock novels generated a central maximal P300 with a shorter peak latency (298 msec) than the P3b. Tactile novels generated a P300 with a scalp distribution comparable to the shock novels. Unlike the P3b, P300 amplitude to both the shock and tactile novel stimuli habituated by 20-30% across the first several stimulus presentations. These results indicate that, similar to the auditory and visual modality, task-irrelevant novel somatosensory stimuli generate a novelty P300 ERP. Differences in scalp distribution, latency and habituation characteristics suggest that the novelty P300 may have contributions from intracranial generators independent from target P300 sources. KW - cksearch KW - p300 AU - Yamaguchi, S AU - Knight, RT PY - 1991/01// UR - http://view.ncbi.nlm.nih.gov/pubmed/1701715 ER -