Perceptual grouping is a process involved in chunking of visual information and in image segmentation, constituting an important aspect of visual processing. Functional magnetic resonance imaging (fMRI) was used to investigate brain activities associated with visual grouping. Twelve healthy subjects (21-31 years) participated in the experiments. Subjects were asked to press a button when he could identify the location of a target quadrant in a grouping task. Contrasting the grouping task against a control task with no target quadrant revealed increased hemodynamic activities in dorsal visual pathway on primary and higher visual areas, parietal association cortex and superior frontal sulcus.
