ArticleImaging neuroscience (Cambridge, Mass.)2024
Theta activity discriminates high-level, species-specific body processes.
Article in Imaging neuroscience (Cambridge, Mass.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Among social stimuli that trigger rapid reactions, body images occupy a prominent place. Given that bodies carry information about other agents' intentions, actions and emotional expressions, a foundational question concerns the neural basis of body processing. Previous functional magnetic resonance imaging (fMRI) studies have investigated this but were not yet able to clarify the time course and its functional significance. The present EEG study investigated the role of slow oscillatory cortical activity in body processing and species-specificity. Human participants viewed naturalistic images of human and monkey bodies, faces, and objects, along with mosaic-scrambled versions to control for low-level visual features. Analysis of event-related theta power (4-7 Hz) combined with data-driven methods revealed a strong, body-evoked neural response that is specific to human bodies and spans a widespread scalp region during a time window of 200-550 ms after the onset of the body image. Our results corroborate recent research proposing a species-specific cortical network of human body processing. We submit that this network may play an essential role in linking body processes to movement intentions.
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