Neuromodulatory effect of bilateral rhythmic tactile stimulation on recognition memory

Delikaya, Anıl Berk
Over two decades, Saccade Induced Retrieval Enhancement (SIRE), referring to memory performance enhancement with alternating left-right horizontal eye movements, gained a lot of popularity among cognitive science researchers. A similar effect can optionally be realized by bilateral tactile stimulation (BLS). Although the mechanism behind the SIRE effect hasn't been conclusively revealed yet, there have been two alternative explanations: the interhemispheric interaction hypothesis and the top- down attentional hypothesis. Main purpose of this thesis is to investigate the neuromodulatory effects of bilateral tactile stimulation on face recognition memory tasks based on these hypotheses. EEG data were acquired while twenty-one university students performed a recognition memory task. Behavioral analyses revealed that subjects under BLS yield more conservative response biases. EEG results showed that the N100 ERP component is modulated by BLS. Moreover, through EEG coherence analysis, there is some indication that BLS induces an increase in interhemispheric connectivity within the delta frequency band in the frontal regions and a decrease within the gamma band in the parietal regions.


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Citation Formats
A. B. Delikaya, “Neuromodulatory effect of bilateral rhythmic tactile stimulation on recognition memory,” M.S. - Master of Science, Middle East Technical University, 2022.