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Stimulus intensity and inter-stimulus interval effects on pain-related cerebral potentials.
- Source :
-
Electroencephalography and clinical neurophysiology [Electroencephalogr Clin Neurophysiol] 1985 Sep; Vol. 62 (5), pp. 352-63. - Publication Year :
- 1985
-
Abstract
- The inter-relationship between stimulus intensity and inter-stimulus interval (ISI) on pain-related evoked vertex potentials was studied. Sixteen subjects were tested with 4 stimulus intensities at 4 different ISIs forming 16 averaged event-related potentials for each subject. Data were analyzed in 2 ways: first by multiple regression analysis of peak-to-peak amplitudes and secondly by single-trial analysis for each subject based on a linear model employing principal component loadings as basis functions, from which were derived separate time-dependent functions describing the contributions of intensity and ISI. Peak-to-peak amplitudes of the averaged waves increased with increases in either intensity of ISI. There were no significant interactions. However, single-trial analysis revealed subtle, but consistent, differences in the peak latencies between stimulus and ISI components, suggesting that the components arise from distinct sources.
Details
- Language :
- English
- ISSN :
- 0013-4694
- Volume :
- 62
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Electroencephalography and clinical neurophysiology
- Publication Type :
- Academic Journal
- Accession number :
- 2411517
- Full Text :
- https://doi.org/10.1016/0168-5597(85)90044-9