Abstract
A fundamental necessity in human cognition is to link sequential mental operations where appropriate execution of the second task requires input from the first. The present study explores the neural basis of such "chaining" using a novel psychological refractory period (PRP) task. Participants were required to make speeded responses to two sequential visual tasks that were chained or independent. Magnetoencephalography (MEG) signals were recorded simultaneously to reveal the brain's response to these similar but fundamentally different conditions. RTs to Task 1 and 2 were slower in the Chained condition, and their temporal coupling weakened, relative to the Independent condition. MEG analysis of the accompanying event-related fields (ERFs) revealed an increased sustained posterior component in the Chained condition beginning approximately 350 ms after Task 2 onset and lasting for 450 ms. Beamformer localization of this ERF effect revealed a left hemisphere source near the junction of the temporal, parietal, and occipital lobes. These results extend our understanding of the behavioral and corresponding neural mechanisms required by everyday decision making.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
