Early cognitive components of somatosensory event-related potentials

Somatosensory event-related potentials (ERPs) were recorded during a selective attention task involving electrical stimuli delivered to index fingers or the left and right median nerves at the wrist. In 11 healthy, young subjects, ERPs were recorded from 6 scalp locations while they mentally counted...

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Bibliographic Details
Published in:International journal of psychophysiology 1990-09, Vol.9 (2), p.139-149
Main Authors: Josiassen, Richard C., Shagass, Charles, Roemer, Richard A., Slepner, Stephen, Czartorysky, Bohdan
Format: Article
Language:English
Subjects:
Adult
Anatomical correlates of behavior
Behavioral psychophysiology
Biological and medical sciences
Cognition - physiology
Electric Stimulation
Electrooculography
Evoked Potentials, Somatosensory - physiology
Female
Fingers - innervation
Fundamental and applied biological sciences. Psychology
Humans
Joints - innervation
Male
Median Nerve - physiology
Muscles - innervation
Neurons, Afferent - physiology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Selective attention
Skin - innervation
Somatosensory event-related potential
Wrist - innervation
Wrist - physiology
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Summary:Somatosensory event-related potentials (ERPs) were recorded during a selective attention task involving electrical stimuli delivered to index fingers or the left and right median nerves at the wrist. In 11 healthy, young subjects, ERPs were recorded from 6 scalp locations while they mentally counted the electrical stimuli designated as target. Sequential ERP events measured included N20 (negativity at 20 ms), P30, P45, N60, P100, N140, P180, and P400. Analysis of amplitude data indicated modifications of both early and late ERP events with selective attention. While electrical stimulation at the wrist yielded early ERP amplitudes that were larger overall and latencies that were generally shorter, the selection attention effects did not differ on the basis of site of stimulation. The early ERP selective attention effects had differing scalp topography, with the P30/P45 effect maximal over postcentral gyrus and N60 effect maximal over prerolandic gyrus. The data further elucidate the temporal features and spatial distribution of somatosensory ERP processes involved in attentional activity.
ISSN:0167-8760
1872-7697
DOI:10.1016/0167-8760(90)90068-O