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Effects of movement advance information were assessed on the prestimulus amplitude of the lateralized readiness potential (LRP), on the contingent negative variation (CNV), and on reaction time (RT). In a precuing paradigm with movement parameters hand, direction, and force, partial precues provided advance information about either hand alone, hand plus force, or hand plus direction and the full precue specified all response parameters. The full precue produced the shortest RTs and the largest CNV amplitude, precuing hand and force or hand and movement direction produced somewhat slower RTs and a somewhat smaller CNV amplitude, and precuing only hand yielded slowest RTs and the smallest CNV amplitude. In contrast, the LRP amplitude was largest for the full precue and the same for the remaining precues. It is concluded that the CNV indexes the central assembling of a motor program and the LRP the implementation of the program at more peripheral levels.
|Glasgow Author(s):||Leuthold, Prof Hartmut|
|Authors:||Ulrich, R., Leuthold, H., and Sommer, W.|
|College/School:||College of Science and Engineering > School of Psychology|