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The functional locus of the lateralized readiness potential
Author(s) -
Masaki Hiroaki,
Wildwall Nele,
Sangals JÖrg,
Sommer Werner
Publication year - 2004
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2004.00150.x
Subject(s) - psychology , stimulus–response compatibility , stimulus (psychology) , cognitive psychology , cognition , simon effect , neuroscience , stimulus–response model , communication , perception
The lateralized readiness potential (LRP) is considered to reflect motor activation and has been used extensively as a tool in elucidating cognitive processes. In the present study, we attempted to more precisely determine the origins of the LRP within the cognitive system. The response selection and motor programming stages were selectively manipulated by varying symbolic stimulus response compatibility and the time to peak force of an isometric finger extension response. Stimulus response compatibility and time to peak force affected response latency, as measured in the electromyogram, in a strictly additive fashion. The effects of the experimental manipulations on stimulus‐ and response‐synchronized LRPs indicate that the LRP starts after the completion of response‐hand selection and at the beginning of motor programming. These results allow a more rigorous interpretation of LRP findings in basic and applied research.