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Keywords = inferior parietal cortex (IPC)

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17 pages, 3060 KiB  
Article
Effect of Audiovisual Cross-Modal Conflict during Working Memory Tasks: A Near-Infrared Spectroscopy Study
by Jiahong Cui, Daisuke Sawamura, Satoshi Sakuraba, Ryuji Saito, Yoshinobu Tanabe, Hiroshi Miura, Masaaki Sugi, Kazuki Yoshida, Akihiro Watanabe, Yukina Tokikuni, Susumu Yoshida and Shinya Sakai
Brain Sci. 2022, 12(3), 349; https://doi.org/10.3390/brainsci12030349 - 3 Mar 2022
Cited by 3 | Viewed by 3857
Abstract
Cognitive conflict effects are well characterized within unimodality. However, little is known about cross-modal conflicts and their neural bases. This study characterizes the two types of visual and auditory cross-modal conflicts through working memory tasks and brain activities. The participants consisted of 31 [...] Read more.
Cognitive conflict effects are well characterized within unimodality. However, little is known about cross-modal conflicts and their neural bases. This study characterizes the two types of visual and auditory cross-modal conflicts through working memory tasks and brain activities. The participants consisted of 31 healthy, right-handed, young male adults. The Paced Auditory Serial Addition Test (PASAT) and the Paced Visual Serial Addition Test (PVSAT) were performed under distractor and no distractor conditions. Distractor conditions comprised two conditions in which either the PASAT or PVSAT was the target task, and the other was used as a distractor stimulus. Additionally, oxygenated hemoglobin (Oxy-Hb) concentration changes in the frontoparietal regions were measured during tasks. The results showed significantly lower PASAT performance under distractor conditions than under no distractor conditions, but not in the PVSAT. Oxy-Hb changes in the bilateral ventrolateral prefrontal cortex (VLPFC) and inferior parietal cortex (IPC) significantly increased in the PASAT with distractor compared with no distractor conditions, but not in the PVSAT. Furthermore, there were significant positive correlations between Δtask performance accuracy and ΔOxy-Hb in the bilateral IPC only in the PASAT. Visual cross-modal conflict significantly impairs auditory task performance, and bilateral VLPFC and IPC are key regions in inhibiting visual cross-modal distractors. Full article
(This article belongs to the Section Sensory and Motor Neuroscience)
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