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Slow brain potentials in a visual-spatial memory task: topographic distribution and inter-laboratory consistency.

J W Rohrbaugh·D N Dunham·P A Stewart·L O Bauer·S Kuperman·S J O'Connor·B Porjesz·H Begleiter
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Abstract

Slow brain electrical potentials (SPs) were investigated in a visual-spatialmemory task. Two issues were addressed: (1) the nature and topographic distribution of the potentials obtained under such conditions; and (2) the consistency of the SPs when recorded in six identically configured laboratories. Fifteen young male subjects were studied at each laboratory (total n = 90). The paradigm entailed presentations of paired-visual patterns (S1 and S2), to which subjects responded with a choice reaction time response indicating whether or not the two patterns matched. A biphasic contingent negative variation (CNV) was produced which consisted of an early symmetric component with bilateral foci at posterior temporal sites and a subsequent mid-parietal dominant wave later in the retention interval. Although the CNVs from all laboratories were similar in waveform and in topographic distribution, there were significant inter-laboratory differences in amplitude of the slow potential components. The topographic distributions of the components and the possible role of sampling effects are discussed.

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AdultBrainBrain MappingEvoked PotentialsFemaleHumansMaleMemoryPhotic StimulationReaction TimeJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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J W Rohrbaugh, D N Dunham, P A Stewart, L O Bauer, S Kuperman, S J O'Connor, B Porjesz, H Begleiter. 1997. Slow brain potentials in a visual-spatial memory task: topographic distribution and inter-laboratory consistency.. https://doi.org/10.1016/s0167-8760(96)00714-3

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