Neural correlates for aesthetic appraisal of pictograph and its referent: An fMRI study

As one kind of language symbols, pictograph has a graphical structure based on its referential object. Are the aesthetic qualities of these referential objects reflected in the cognitive and neural processing of the font structure of pictographs? In this present study, participants performed aesthetic judgments on both pictographs and their referential object images whilst acquiring fMRI data. Square luminance judgment was served as baseline to control for activity in motor brain regions associated with the key responses. Behavioral results showed both font structures of pictographs and their corresponding object images which refer to beautiful objects were rated significantly higher on beauty than those refer to ugly objects. Functional MRI revealed regions of occipital lobe, frontal lobe and inferior orbitofrontal cortex (OFC) that were commonly activated for pictographs and object images referring to beautiful objects in the direct contrasts between beautiful judgment and luminance judgment. Moreover, only the aesthetic judgments of beauty for the pictographs but not the object images elicited activation of motor areas, which implied relevant embodied experience was elicited during the aesthetic perception of novel pictographs. In contrast, activities associated with pictographs referring to ugly objects were limited to visual processing regions of the bilateral inferior occipital gyri, which could be due to the intentions of avoiding ugly or aversive stimulus. In addition, object images were associated with broader recruitment in cortical areas than pictographs, likely due to the increased visual processing demands for the more visually complex object images. These findings indicate that aesthetic perceptions for the font structures of pictographs were derived from their referential objects, which could arouse a similar sense of beauty supported by common neural mechanisms with other aesthetic objects.