Stimulating the parietal cortex by transcranial direct current stimulation (tDCS): no effects on attention and memory

Dubravac, Mirela; Meier, Beat (2021). Stimulating the parietal cortex by transcranial direct current stimulation (tDCS): no effects on attention and memory. Aims Neuroscience, 8(1), pp. 33-46. AIMS Press 10.3934/Neuroscience.2021002

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Selective attention is relevant for goal directed behavior as it allows people to attend to task-relevant target stimuli and to ignore task-irrelevant distractors. Attentional focus at encoding affects subsequent memory for target and distractor stimuli. Remembering selectively more targets than distractors represents memory selectivity. Brain imaging studies suggest that the superior parietal cortex is associated with the dorsal attentional network supporting top-down control of selective attention while the inferior parietal cortex is associated with the ventral attentional network supporting bottom-up attentional orienting. To investigate the roles of the dorsal and ventral networks in the effect of selective attention during encoding on long-term memory, we stimulated the left superior and the right inferior parietal cortex. Building on previous work, we applied transcranial direct current stimulation (tDCS) during a study phase where pictures and words were presented simultaneously and participants had to switch between a picture and a word decision. A subsequent recognition test assessed memory for target and distractor pictures and words. We hypothesized that a relative increase in activity in the dorsal network would boost selective attention while increased activity in the ventral network would impair selective attention. We also expected to find corresponding effects on memory. Enhanced selective attention should lead to higher memory selectivity, while impaired selective attention should lead to lower memory selectivity. Our results replicated that task switching reduced memory selectivity. However, we found no significant effects of tDCS. Thus, the present study questions the effectiveness of the present tDCS protocol for modulating attention during task switching and subsequent memory.

Item Type:

Journal Article (Original Article)

Division/Institute:

07 Faculty of Human Sciences > Institute of Psychology > Cognitive Psychology, Perception and Methodology

Graduate School:

Swiss Graduate School for Cognition, Learning and Memory (SGS-CLM)

UniBE Contributor:

Dubravac, Mirela and Meier, Beat

Subjects:

100 Philosophy > 150 Psychology

ISSN:

2373-7972

Publisher:

AIMS Press

Language:

English

Submitter:

Mirela Dubravac

Date Deposited:

24 Nov 2020 10:12

Last Modified:

24 Nov 2020 10:12

Publisher DOI:

10.3934/Neuroscience.2021002

BORIS DOI:

10.7892/boris.148452

URI:

https://boris.unibe.ch/id/eprint/148452

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