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Right hemisphere advantage in statistical learning: evidence from a probabilistic sequence learning task

Right hemisphere advantage in statistical learning: evidence from a probabilistic sequence learning task

Janacsek, Karolina, Ambrus, Geza Gergely, Paulus, Walter, Antal, Andrea and Nemeth, Dezso (2014) Right hemisphere advantage in statistical learning: evidence from a probabilistic sequence learning task. Brain Stimulation, 8 (2). pp. 277-282. ISSN 1935-861X (doi:https://doi.org/10.1016/j.brs.2014.11.008)

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Abstract

Picking up statistical regularities of patterns from the environment is essential for predictive and adaptive behavior. One of the most important challenges is to understand how statistical learning occurs and how the acquired information consolidates and stabilizes in the brain. Evidence suggests that the prefrontal cortex (PFC) has a critical role in these processes; the division of labor between hemispheres, however, is less characterized. The aim of the present study was to directly investigate the causal role of the right and left PFC in statistical learning and its consolidation. Healthy, young adults were trained on a probabilistic sequence learning task. Anodal transcranial direct current stimulation (tDCS) over the right or left dorsolateral PFC (DLPFC) was applied during the training in order to modify learning-related cortical plasticity in the targeted brain regions by increasing neural excitability. Performance was tested during and immediately after the stimulation, 2-hour and 24-hour later. We found that the anodal tDCS over the right DLPFC led to enhanced learning performance both after the 2-hour and 24-hour retention periods, suggesting the causal role of this area in statistical learning. In contrast, we did not find any effect of left DLPFC stimulation on learning. These results highlight the role of the right fronto-striatal network in statistical learning and its consolidation.

Item Type: Article
Uncontrolled Keywords: statistical learning, probabilistic sequence learning, implicit learning, prefrontal cortex (PFC), fronto-striatal network, memory consolidation
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Faculty / Department / Research Group: Faculty of Education, Health & Human Sciences
Faculty of Education, Health & Human Sciences > Department of Psychology, Social Work & Counselling
Last Modified: 13 Jan 2020 11:02
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25711

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