Tobacco effects on cortical evoked potentials to task stimuli |
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| Authors: | V J Knott |
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| Affiliation: | 1. Graduate School, Department of Naval Architecture and Ocean Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;2. Department of the Naval Architecture and Ocean Engineering, and Research Institute of Marine Systems Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korean;3. Hyundai Heavy Industries Co., Ltd., 1000 Bangeojinsunhwan-doro, Dong-gu, Ulsan 44032, Republic of Korea;1. Faculty of Mechanical Engineering, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovak Republic;2. Technical University of Kosice, Letna 9, 042 00 Kosice, Slovak Republic;1. Department of Psychology and Neuroscience, University of North Carolina, Chapel Hill, NC, 27599, USA;2. Bowles Center for Alcohol Studies, University of North Carolina, Chapel Hill, NC 27599, USA;3. Biomedical Research Imaging Center, University of North Carolina, Chapel Hill, NC 27599, USA |
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| Abstract: | Cortical evoked potentials (EP) were investigated in a group of female smokers in separate smoking and non-smoking sessions. In a constant-fore-period S1-S2 reaction time paradigm, EPs were averaged separately to auditory warning (S1) stimuli and visual imperative (S2) stimuli under 4 conditions: (a) a single-choice S1-S2 sequence with no auditory distraction task; (b) a single-choice S1-S2 sequence with concomitant auditory distraction task; (c) a four-choice S1-S2 sequence with no auditory distraction task; (d) a four-choice S1-S2 sequence with concomitant auditory distraction task. Two individual EP peaks, N1 and P2 and one peak-to-peak measure, N1-P2, were involved in amplitude analysis of S1 and S2 stimuli. Tobacco significantly improved the decision time (DT) component of reaction time and increased N1 amplitudes to S1 stimuli. Tobacco also interacted with task complexity to reduce P2 amplitudes to S1. No significant tobacco effects were observed with EPs to S2. The results are discussed in relation to improved attention and information processing. |
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