Delayed Copying of Unfamiliar Outline Images: Analysis of Stimulus Presentation-Related Potentials
- 16 Downloads
High-density EEG recordings were made during performance of tasks consisting of delayed motor reproduction of unfamiliar trajectory outline images, with evaluation of event-related potentials (ERP) associated with presentation of these images and a command sound signal (a short sound). A total of 22 right-handed adult subjects took part in the study, which consisted of five blocks of trials with different delays T between the command sound signal and the end of presentation of trajectory outlines (T = 0, 500, 1000, 2000, and 4000 msec). analysis of ERP showed that in contrast to potentials associated with trajectory outline presentation, potentials linked with presentation of the command signals depended on delay duration T. Analysis of the cortical sources of these potentials showed that the changes seen in the sensor space corresponded to a marked monotonic increase in the reactivity of the orbital cortex of the right hemisphere and bilaterally symmetrical increases in the reactivity of the dorsal areas of the sensorimotor cortex. These data are assessed in the framework of the hypothesis of transformations of the internal representation of the trajectory from a sensory-specific format to an abstract sensory- and motor-nonspecific format occurring during the period of holding in working memory.
Keywordsworking memory internal representation outline images motor sequences high-density EEG event-linked potentials (ERP) cortical sources
Unable to display preview. Download preview PDF.
- Abrahamse, E. L., Ruitenberg, M. E., de Kleine, E., and Verwey, W. B., “Control of automated behavior: insights from the discrete sequence production task,” Front. Hum. Neurosci., 19, 7–82 (2013).Google Scholar
- Glover, S., “Separate visual representations in the planning and control of action,” Behav. Brain Sci., 27, No. 1, 3–24, 24–78 (discussion) (2004).Google Scholar
- Korneev, A. A. and Kurganskii, A. V., “Effects of the means of visual presentation of a complex trajectory on the time parameters of its delayed motor reproduction,” Psikhol. Issled., No. 7, 37 (2014a).Google Scholar
- Korneev, A. A. and Kurganskii, A. V., “Internal representations of a series of movements on reproduction of a static diagram and the trajectory of a moving object,” Zh. Vyssh. Nerv. Deyat., 63, No. 4, 437–450 (2013).Google Scholar
- Korneev, A. A. and Kurganskii, A. V., “Transformation of the order of movements in a series specified by a visual image,” Vestn. Mosk. Univ. Ser 14. Psikhol., No. 2, 61–74 (2014b).Google Scholar
- Korneev, A. A., Lomaskin, D. I., and Kurganskii, A. V., “Delayed copying of unfamiliar outline images: does the decrease in reaction time with increases in delay reflect changes in the internal representation of the future movement?” Zh. Vyssh. Nerv. Deyat., 66, 51–61 (2016).Google Scholar