Event-related potentials during auditory discrimination :attentional and intentional effects
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The purpose of this dissertation study was to assess the neurophysiological activity associated with selective attention, response selection, and response inhibition. The subjects were 27 right-handed college students, 14 men and 13 women, aged 18-21. They performed a go/no-go auditory discrimination task while EEG was recorded from 19 monopolar electrode sites and averaged for evoked potentials. Amplitudes and latencies were measured for four event-related potentials (N1, P2, N2, and P3) at three midline electrode sites (Fz, Cz, pz) and eight bilateral sites (Fp1, Fp2, F3, F4, C3, C4, P3, P4).
Measures from the midline and bilateral sites were subjected to separate repeated measures ANOVAs for within subjects factors of condition (go and no-go), region (prefrontal, frontal, central, and parietal), and hemisphere (left and right). Grand averages and topographic isopotential maps were generated for each component and condition.
- Doctoral Dissertations