Bodies in motion: Unraveling the distinct roles of motion and shape in dynamic body responses in the temporal cortex

Raman, Rajani; Bognár, Anna; Nejad, Ghazaleh Ghamkhari; Taubert, Nick; Giese, Martin; Vogels, Rufin

doi:10.1016/j.celrep.2023.113438

Cell Reports

2023

DOI: 10.1016/j.celrep.2023.113438

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Bodies in motion: Unraveling the distinct roles of motion and shape in dynamic body responses in the temporal cortex

Rajani Raman,

Anna Bognár,

Ghazaleh Ghamkhari Nejad

et al.

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2024

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Cited by 2 publications

References 53 publications

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Theta activity discriminates high-level, species-specific body processes

Chesley,

Riecke,

et al. 2024

Imaging Neuroscience

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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 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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Theta activity discriminates high-level, species-specific body processes

Chesley,

Riecke,

et al. 2024

Imaging Neuroscience

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Neural Encoding of Bodies for Primate Social Perception

Abassi,

Bognár,

de Gelder

et al. 2024

J. Neurosci.

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Primates, as social beings, have evolved complex brain mechanisms to navigate intricate social environments. This review explores the neural bases of body perception in both human and nonhuman primates, emphasizing the processing of social signals conveyed by body postures, movements, and interactions. Early studies identified selective neural responses to body stimuli in macaques, particularly within and ventral to the superior temporal sulcus (STS). These regions, known as body patches, represent visual features that are present in bodies but do not appear to be semantic body detectors. They provide information about posture and viewpoint of the body. Recent research using dynamic stimuli has expanded the understanding of the body-selective network, highlighting its complexity and the interplay between static and dynamic processing. In humans, body-selective areas such as the extrastriate body area (EBA) and fusiform body area (FBA) have been implicated in the perception of bodies and their interactions. Moreover, studies on social interactions reveal that regions in the human STS are also tuned to the perception of dyadic interactions, suggesting a specialized social lateral pathway. Computational work developed models of body recognition and social interaction, providing insights into the underlying neural mechanisms. Despite advances, significant gaps remain in understanding the neural mechanisms of body perception and social interaction. Overall, this review underscores the importance of integrating findings across species to comprehensively understand the neural foundations of body perception and the interaction between computational modeling and neural recording.

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Bodies in motion: Unraveling the distinct roles of motion and shape in dynamic body responses in the temporal cortex

Cited by 2 publications

References 53 publications

Theta activity discriminates high-level, species-specific body processes

Theta activity discriminates high-level, species-specific body processes

Neural Encoding of Bodies for Primate Social Perception

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