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Giannopulu I, Lee K, Abdi E, Noori-Hoshyar A, Brotto G, Van Velsen M, Lin T, Gauchan P, Gorman J, Indelicato G. Predicting neural activity of whole body cast shadow through object cast shadow in dynamic environments. Front Psychol 2024; 15:1149750. [PMID: 38646121 PMCID: PMC11027993 DOI: 10.3389/fpsyg.2024.1149750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 01/23/2024] [Indexed: 04/23/2024] Open
Abstract
Shadows, as all other objects that surround us, are incorporated into the body and extend the body mediating perceptual information. The current study investigates the hypothesis according to which the perception of object shadows would predict the perception of body shadows. 38 participants (19 males and 19 females) aged 23 years on average were immersed into a virtual reality environment and instructed to perceive and indicate the coincidence or non coincidence between the movement of a ball shadow with regard to ball movement on the one hand, and between their body shadow and their body position in space on the other. Their brain activity was recording via a 32-channel EEG system, in which beta (13.5-30 Hz) oscillations were analyzed. A series of Multiple Regression Analysis (MRA) revealed that the beta dynamic oscillations patterns of the bilateral occipito-parieto-frontal pathway associated with the perception of ball shadow appeared to be a significant predictor of the increase in beta oscillations across frontal areas related to the body shadow perception and the decrease in beta oscillations across frontal areas connected to the decision making of the body shadow. Taken together, the findings suggest that inferential thinking ability relative to body shadow would be reliably predicted from object shadows and that the bilateral beta oscillatory modulations would be indicative of the formation of predictive neural frontal assemblies, which encode and infer body shadow neural representation, that is, a substitution of the physical body.
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Affiliation(s)
- Irini Giannopulu
- Creative Robotics Lab, UNSW, Sydney, NSW, Australia
- Clinical Research and Technological Innovation Centre, RCIT, Paris, France
| | - Khai Lee
- Department of Mechanical, Aerospace and Mechatronics Engineering, Monash University Australia, Melbourne, VIC, Australia
| | - Elahe Abdi
- Department of Mechanical, Aerospace and Mechatronics Engineering, Monash University Australia, Melbourne, VIC, Australia
| | - Azadeh Noori-Hoshyar
- School of Engineering, Information Technology and Physical Sciences, Federation University, Ballarat, VIC, Australia
| | - Gaelle Brotto
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
| | - Mathew Van Velsen
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
| | - Tiffany Lin
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
| | - Priya Gauchan
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
| | - Jazmin Gorman
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
| | - Giuseppa Indelicato
- Interdisciplinary Centre for the Artificial Mind (iCAM), Gold Coast, QLD, Australia
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