The degree of affective disturbance was positively correlated with excessive-width-dependent brain activation in the right temporoparietal junction and negatively correlated with functional connectivity between the left extrastriate body area and right precuneus when estimating one’s ideal body size. The degree of perceptual disturbance was positively correlated with excessive-width-dependent brain activations in the right anterior insula and left anterior cingulate cortex when estimating one’s body size it was positively correlated with the functional connectivity between the left extrastriate body area and left anterior insula. Specifically, we examined the brain activations associated with participants’ estimation of the width of their actual and ideal bodies we sought to determine which brain regions and functional connectivity from body-related visual-processing regions were correlated with the degree of each component of body-image disturbance.

Thus, this study investigated the brain regions and connectivity associated with the degree of body-image disturbance. Previous behavioral studies have hypothesized that attention to particular body parts and negative body-related emotion derived from social pressure are associated with the respective degrees of perceptual and affective disturbance however, the neural representations that underlie this hypothesis have not been elucidated. There are two components of body-image disturbance: perceptual disturbance (associated with overestimation of body size) and affective disturbance (associated with body dissatisfaction). Finally, both ventral and dorsal regions were modulated during reorienting but significantly only by reorienting after voluntary shifts, suggesting the importance of a mismatch between expectation and sensory input.īody-image disturbance is a core feature of eating disorders and can predict their development in healthy individuals. However, the TPJ did not respond to salient, task-irrelevant color singletons, indicating that behavioral relevance is critical for TPJ modulation during stimulus-driven orienting. The right temporoparietal junction (TPJ), a core region of the ventral frontoparietal attention network, was strongly modulated by stimulus-driven attentional shifts to behaviorally relevant stimuli, such as targets at unattended locations. Stimulus-driven attentional shifts to salient color singletons recruited occipitotemporal regions, sensitive to color information and part of the dorsal network, including the FEF, suggesting a partly overlapping circuit for endogenous and exogenous orienting.

Voluntary shifts produced greater preparatory activity than stimulus-driven shifts in the frontal eye field (FEF) and intraparietal sulcus, core regions of the dorsal frontoparietal attention network, demonstrating their special role in the voluntary control of attention. We compared the effects of voluntary and stimulus-driven shifts of spatial attention on the blood oxygenation level-dependent signal in humans, using a method that separated preparatory activity related to the initial shift of attention from the subsequent activity caused by target presentation. Attention can be voluntarily directed to a location or automatically summoned to a location by a salient stimulus.

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