This research was supported in part by a NIMH grant (MH36295) to G.E.B., and additional support for data processing was provided by a Mental Health Clinical Research Center Grant (MH30906).
Correspondence between brain ERP and behavioral asymmetries in a dichotic complex tone test
Article first published online: 30 JAN 2007
Volume 30, Issue 1, pages 62–70, January 1993
How to Cite
TENKE, C. E., BRUDER, G. E., TOWEY, J. P., LEITE, P. and SIDTIS, J. J. (1993), Correspondence between brain ERP and behavioral asymmetries in a dichotic complex tone test. Psychophysiology, 30: 62–70. doi: 10.1111/j.1469-8986.1993.tb03205.x
We thank Martina Voglmaier and Hulya Erhan for their help in testing. We are also grateful to Charles Brown and Dr. Daniel Ruchkin for providing additional laboratory computer software.
- Issue published online: 30 JAN 2007
- Article first published online: 30 JAN 2007
- (Received February 13, 1991; Accepted November 20, 1991)
- Event-related potentials;
- P300 (P3);
- Dichotic listening;
- Pitch discrimination;
Electrophysiologic correlates of perceptual asymmetry for dichotic pitch discrimination were investigated in 20 normal subjects. Brain event-related potentials (ERPs) elicited by dichotic pairs and binaural probe tones in the Complex Tone Test (Sidtis, 1981) were recorded from homologous scalp locations over left and right hemispheres (F3, F4; C3, C4; P3, P4; O1, O2). Baseline-to-peak amplitudes were measured for N100, P200, and a late positive complex consisting of P350, P550, and slow wave. A left ear advantage (LEA) was evident in 70% of the subjects, and hemispheric asymmetries related to this behavioral asymmetry were found for P350 and P550 amplitudes to probe stimuli. Subjects with a strong LEA had greater amplitudes over the right hemisphere than the left, whereas subjects with little or no LEA showed a nonsignificant trend toward the opposite hemispheric asymmetry. Hemispheric asymmetry of these late ERPs at parietal and occipital sites was highly correlated with behavioral asymmetry. These findings suggest the utility of electrophysiological measures in assessing hemispheric asymmetries for processing complex pitch information.