Traveling EEG slow oscillation along the dorsal attention network initiates spontaneous perceptual switching

• Published in: Cognitive neurodynamics Vol. 6; no. 2; pp. 185 - 198
• Main Authors: Ozaki, Takashi J., Sato, Naoyuki, Kitajo, Keiichi, Someya, Yoshiaki, Anami, Kimitaka, Mizuhara, Hiroaki, Ogawa, Seiji, Yamaguchi, Yoko
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-04-2012; Springer Nature B.V
• Subjects: Artificial Intelligence; Biochemistry; Biomedical and Life Sciences; Biomedicine; Cognitive Psychology; Computer Science; Data analysis; EEG; Electrodes; Electroencephalography; Experiments; Functional magnetic resonance imaging; Hypotheses; Magnetic resonance imaging; Modulation; Neurosciences; Perception; Research Article; Satiety; Software; Switching; Visual perception; Multistable perception; fMRI; Simultaneous EEG–fMRI; Intrinsic neural dynamics; Dorsal attention network; EEG; Slow oscillation
• ISSN: 1871-4080; 1871-4099
• DOI: 10.1007/s11571-012-9196-y

An ambiguous figure such as the Necker cube causes spontaneous perceptual switching (SPS). The mechanism of SPS in multistable perception has not yet been determined. Although early psychological studies suggested that SPS may be caused by fatigue or satiation of orientation, the neural mechanism of SPS is still unknown. Functional magnetic resonance imaging (fMRI) has shown that the dorsal attention network (DAN), which mainly controls voluntary attention, is involved in bistable perception of the Necker cube. To determine whether neural dynamics along the DAN cause SPS, we performed simultaneous electroencephalography (EEG) and fMRI during an SPS task with the Necker cube, with every SPS reported by pressing a button. This EEG–fMRI integrated analysis showed that (a) 3–4 Hz spectral EEG power modulation at fronto-central, parietal, and centro-parietal electrode sites sequentially appeared from 750 to 350 ms prior to the button press; and (b) activations correlating with the EEG modulation traveled along the DAN from the frontal to the parietal regions. These findings suggest that slow oscillation initiates SPS through global dynamics along the attentional system such as the DAN.