Poster F92, Tuesday, March 27, 8:00-10:00 am, Exhibit Hall C
Asymmetric Interference Between Cognitive Task Components and Concurrent Sensorimotor Coordination
Joshua Baker1, Antonio Castro1, Andrew K Dunn1, Suvobrata Mitra1; 1Nottingham Trent University
Everyday human behavior frequently involves continuous sensorimotor coordination (CSC) such as driving, walking or manually operating machinery, while concurrently performing an unrelated cognitive task. Many such dual tasks exhibit interference patterns that are attributed to shared attentional and executive function processes. Most everyday cognitive tasks involve perceptual, attentional as well as executive function components, and the time-course and reciprocity of CSC-cognitive interference are not well understood at the level of these cognitive task components. We used electrophysiology to study the detailed chronometry of dual-task interference between a visual oddball task with covert response (mentally tallying target count) and a visuomanual pursuit-tracking task. Dual-tasking interfered with the oddball task’s accuracy and attentional resourcing (attenuated P2 and P3b magnitude, frontal and parietal alpha-band power and fronto-parietal alpha-band coherence). Spectral power over contralateral motor cortex did not change when the oddball task was added to pursuit-tracking. Tracking deviation accumulated at a later time-scale, and only in trials requiring the executive function of updating the target count. These results show that interference in CSC-cognitive dual-tasking can be asymmetric in both timing and information-processing components affected.
Topic Area: PERCEPTION & ACTION: Motor control