The neural substrates of feature-based joint attention using a hyperscanning functional MRI

[Speaker] Yoshioka, Ayumi:1
[Co-author] Tanabe, Hiroki C:1, Koike, Takahiko:2, Nakagawa, Eri:2, Sumiya, Motofumi:2, Okazaki, Shuntaro:2, Sadato, Norihiro:2
1:Nagoya University (Japan), 2:National Institute for Physiological Sciences (Japan)

Typical joint attention (JA) is to share spatial attention between two persons, however, it can be extended for object-based attention. The purpose of the present study is to clarify the neural substrates of feature-based JA, employing a real interactive hyperscanning MRI. Twenty-two pairs were participated. In the feature-based joint attention task, stimuli were constructed with 4 DIMENSIONS such as number, shape, color, and pattern. Each stimulus has one of 4 CHARACTORS in each dimension. Initiator freely chose one of 4 DIMENSIONS of the stimulus, and responder answered a CHARACTOR of this designated dimension. The initiator judged the answer and feedback verbally. Specific regions of the feature-based JA were bilateral occipital pole, thalamus, anterior cingulate cortex, and left inferior frontal gyrus. Common regions of both spatial and feature-based JA were bilateral inferior frontal region, anterior insula, superior temporal gyrus, pre-supplementary motor area, anterior cingulate cortex, medial prefrontal cortex, precuneus, and thalamus.
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