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"Stay tuned": inter-individual neural synchronization during mutual gaze and joint attention.

Saito DN, Tanabe HC, Izuma K, Hayashi MJ, Morito Y, Komeda H, Uchiyama H, Kosaka H, Okazawa H, Fujibayashi Y, Sadato N - Front Integr Neurosci (2010)

Bottom Line: Averted gaze activated the bilateral occipital pole extending to the right posterior superior temporal sulcus, the dorso-medial prefrontal cortex, and the bilateral inferior frontal gyrus.After all the task-related effects were modeled out, inter-individual correlation analysis of residual time-courses was performed.Paired subjects showed more prominent correlations than non-paired subjects in the right inferior frontal gyrus, suggesting that this region is involved in sharing intention during eye contact that provides the context for joint attention.

View Article: PubMed Central - PubMed

Affiliation: Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological Sciences Okazaki, Aichi, Japan.

ABSTRACT
Eye contact provides a communicative link between humans, prompting joint attention. As spontaneous brain activity might have an important role in the coordination of neuronal processing within the brain, their inter-subject synchronization might occur during eye contact. To test this, we conducted simultaneous functional MRI in pairs of adults. Eye contact was maintained at baseline while the subjects engaged in real-time gaze exchange in a joint attention task. Averted gaze activated the bilateral occipital pole extending to the right posterior superior temporal sulcus, the dorso-medial prefrontal cortex, and the bilateral inferior frontal gyrus. Following a partner's gaze toward an object activated the left intraparietal sulcus. After all the task-related effects were modeled out, inter-individual correlation analysis of residual time-courses was performed. Paired subjects showed more prominent correlations than non-paired subjects in the right inferior frontal gyrus, suggesting that this region is involved in sharing intention during eye contact that provides the context for joint attention.

No MeSH data available.


(A) Power spectrum of the averaged innovations obtained by ARx at (44, 26, −6). No sharp peak of the power spectrum was noted. (B) Standardized correlation value (z-score) of the pair and non-pair group. Error bars indicate the standard error of the mean.
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Figure 7: (A) Power spectrum of the averaged innovations obtained by ARx at (44, 26, −6). No sharp peak of the power spectrum was noted. (B) Standardized correlation value (z-score) of the pair and non-pair group. Error bars indicate the standard error of the mean.

Mentions: The power spectrum of the ARx innovation at (44, 26, −6) did not show any prominent peaks (Figure 7A). The between-subject correlation was significantly more prominent in the paired group than that in non-paired group (P < 0.001, two-sample t-test; Figure 7B). The synchronization between non-pairs was small but also significant (t(341) = 4.228, P < 0.001, one-sample t-test). The same results were obtained at other local maxima within the cluster in the right IFG shown in Table 3.


"Stay tuned": inter-individual neural synchronization during mutual gaze and joint attention.

Saito DN, Tanabe HC, Izuma K, Hayashi MJ, Morito Y, Komeda H, Uchiyama H, Kosaka H, Okazawa H, Fujibayashi Y, Sadato N - Front Integr Neurosci (2010)

(A) Power spectrum of the averaged innovations obtained by ARx at (44, 26, −6). No sharp peak of the power spectrum was noted. (B) Standardized correlation value (z-score) of the pair and non-pair group. Error bars indicate the standard error of the mean.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2990457&req=5

Figure 7: (A) Power spectrum of the averaged innovations obtained by ARx at (44, 26, −6). No sharp peak of the power spectrum was noted. (B) Standardized correlation value (z-score) of the pair and non-pair group. Error bars indicate the standard error of the mean.
Mentions: The power spectrum of the ARx innovation at (44, 26, −6) did not show any prominent peaks (Figure 7A). The between-subject correlation was significantly more prominent in the paired group than that in non-paired group (P < 0.001, two-sample t-test; Figure 7B). The synchronization between non-pairs was small but also significant (t(341) = 4.228, P < 0.001, one-sample t-test). The same results were obtained at other local maxima within the cluster in the right IFG shown in Table 3.

Bottom Line: Averted gaze activated the bilateral occipital pole extending to the right posterior superior temporal sulcus, the dorso-medial prefrontal cortex, and the bilateral inferior frontal gyrus.After all the task-related effects were modeled out, inter-individual correlation analysis of residual time-courses was performed.Paired subjects showed more prominent correlations than non-paired subjects in the right inferior frontal gyrus, suggesting that this region is involved in sharing intention during eye contact that provides the context for joint attention.

View Article: PubMed Central - PubMed

Affiliation: Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological Sciences Okazaki, Aichi, Japan.

ABSTRACT
Eye contact provides a communicative link between humans, prompting joint attention. As spontaneous brain activity might have an important role in the coordination of neuronal processing within the brain, their inter-subject synchronization might occur during eye contact. To test this, we conducted simultaneous functional MRI in pairs of adults. Eye contact was maintained at baseline while the subjects engaged in real-time gaze exchange in a joint attention task. Averted gaze activated the bilateral occipital pole extending to the right posterior superior temporal sulcus, the dorso-medial prefrontal cortex, and the bilateral inferior frontal gyrus. Following a partner's gaze toward an object activated the left intraparietal sulcus. After all the task-related effects were modeled out, inter-individual correlation analysis of residual time-courses was performed. Paired subjects showed more prominent correlations than non-paired subjects in the right inferior frontal gyrus, suggesting that this region is involved in sharing intention during eye contact that provides the context for joint attention.

No MeSH data available.