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An fMRI study of joint action-varying levels of cooperation correlates with activity in control networks.

Chaminade T, Marchant JL, Kilner J, Frith CD - Front Hum Neurosci (2012)

Bottom Line: As joint performance improved with the level of cooperation, we assessed the brain responses correlating with behavior, and found that activity in most of the areas associated with levels of cooperation also correlated with the joint performance.The only brain area found exclusively in the negative correlation with cooperation was in the dorso medial frontal cortex, involved in monitoring action outcome.Our results, therefore, indicate that, in the current experimental paradigm involving joint control of a visually presented object with joystick movements, the level of cooperation affected brain networks involved in action control, but not mentalizing.

View Article: PubMed Central - PubMed

Affiliation: Institut de Neurosciences de la Timone, Campus Santé Timone Marseille, France.

ABSTRACT
As social agents, humans continually interact with the people around them. Here, motor cooperation was investigated using a paradigm in which pairs of participants, one being scanned with fMRI, jointly controlled a visually presented object with joystick movements. The object oscillated dynamically along two dimensions, color and width of gratings, corresponding to the two cardinal directions of joystick movements. While the overall control of each participant on the object was kept constant, the amount of cooperation along the two dimensions varied along four levels, from no (each participant controlled one dimension exclusively) to full (each participant controlled half of each dimension) cooperation. Increasing cooperation correlated with BOLD signal in the left parietal operculum and anterior cingulate cortex (ACC), while decreasing cooperation correlated with activity in the right inferior frontal and superior temporal gyri, the intraparietal sulci and inferior temporal gyri bilaterally, and the dorsomedial prefrontal cortex. As joint performance improved with the level of cooperation, we assessed the brain responses correlating with behavior, and found that activity in most of the areas associated with levels of cooperation also correlated with the joint performance. The only brain area found exclusively in the negative correlation with cooperation was in the dorso medial frontal cortex, involved in monitoring action outcome. Given the cluster location and condition-related signal change, we propose that this region monitored actions to extract the level of cooperation in order to optimize the joint response. Our results, therefore, indicate that, in the current experimental paradigm involving joint control of a visually presented object with joystick movements, the level of cooperation affected brain networks involved in action control, but not mentalizing.

No MeSH data available.


Joint performance error (arbitrary units; error bar: standard error) as a function of the level of cooperation. Horizontal lines indicate significant pairwise comparisons (p < 0.05).
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Figure 2: Joint performance error (arbitrary units; error bar: standard error) as a function of the level of cooperation. Horizontal lines indicate significant pairwise comparisons (p < 0.05).

Mentions: Joint performance error was significantly modulated by the level of cooperation (p < 0.001), but not by the fMRI scanning session (main effect and interaction with levels of cooperation p > 0.5). The best joint performance (lowest error) was observed when participants acted in full cooperation and the joint performance error was greatest when participants acted fully independently to control one dimension each (see Figure 2). All pairwise comparisons were significant (at p < 0.05) except between 1/3 and 2/3 levels of cooperation, and a linear fit of the data as a function of the level of cooperation was significant (p < 0.001). The effect of sessions and interaction between levels of cooperation and sessions were not significant (both p > 0.1).


An fMRI study of joint action-varying levels of cooperation correlates with activity in control networks.

Chaminade T, Marchant JL, Kilner J, Frith CD - Front Hum Neurosci (2012)

Joint performance error (arbitrary units; error bar: standard error) as a function of the level of cooperation. Horizontal lines indicate significant pairwise comparisons (p < 0.05).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3375616&req=5

Figure 2: Joint performance error (arbitrary units; error bar: standard error) as a function of the level of cooperation. Horizontal lines indicate significant pairwise comparisons (p < 0.05).
Mentions: Joint performance error was significantly modulated by the level of cooperation (p < 0.001), but not by the fMRI scanning session (main effect and interaction with levels of cooperation p > 0.5). The best joint performance (lowest error) was observed when participants acted in full cooperation and the joint performance error was greatest when participants acted fully independently to control one dimension each (see Figure 2). All pairwise comparisons were significant (at p < 0.05) except between 1/3 and 2/3 levels of cooperation, and a linear fit of the data as a function of the level of cooperation was significant (p < 0.001). The effect of sessions and interaction between levels of cooperation and sessions were not significant (both p > 0.1).

Bottom Line: As joint performance improved with the level of cooperation, we assessed the brain responses correlating with behavior, and found that activity in most of the areas associated with levels of cooperation also correlated with the joint performance.The only brain area found exclusively in the negative correlation with cooperation was in the dorso medial frontal cortex, involved in monitoring action outcome.Our results, therefore, indicate that, in the current experimental paradigm involving joint control of a visually presented object with joystick movements, the level of cooperation affected brain networks involved in action control, but not mentalizing.

View Article: PubMed Central - PubMed

Affiliation: Institut de Neurosciences de la Timone, Campus Santé Timone Marseille, France.

ABSTRACT
As social agents, humans continually interact with the people around them. Here, motor cooperation was investigated using a paradigm in which pairs of participants, one being scanned with fMRI, jointly controlled a visually presented object with joystick movements. The object oscillated dynamically along two dimensions, color and width of gratings, corresponding to the two cardinal directions of joystick movements. While the overall control of each participant on the object was kept constant, the amount of cooperation along the two dimensions varied along four levels, from no (each participant controlled one dimension exclusively) to full (each participant controlled half of each dimension) cooperation. Increasing cooperation correlated with BOLD signal in the left parietal operculum and anterior cingulate cortex (ACC), while decreasing cooperation correlated with activity in the right inferior frontal and superior temporal gyri, the intraparietal sulci and inferior temporal gyri bilaterally, and the dorsomedial prefrontal cortex. As joint performance improved with the level of cooperation, we assessed the brain responses correlating with behavior, and found that activity in most of the areas associated with levels of cooperation also correlated with the joint performance. The only brain area found exclusively in the negative correlation with cooperation was in the dorso medial frontal cortex, involved in monitoring action outcome. Given the cluster location and condition-related signal change, we propose that this region monitored actions to extract the level of cooperation in order to optimize the joint response. Our results, therefore, indicate that, in the current experimental paradigm involving joint control of a visually presented object with joystick movements, the level of cooperation affected brain networks involved in action control, but not mentalizing.

No MeSH data available.