期刊
CEREBRAL CORTEX
卷 29, 期 8, 页码 3434-3444出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhy212
关键词
actions; fMRI; organization; visual cortex; visual perception
资金
- Societa Scienze Mente Cervello-Fondazione Cassa di Risparmio di Trento e Rovereto
- Provincia Autonoma di Trento
- Harvard Provostial postdoctoral fund
- European Union's Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie Grant Agreement [654837]
- Israel National Postdoctoral Award Program for Advancing Women in Science
- Marie Curie Actions (MSCA) [654837] Funding Source: Marie Curie Actions (MSCA)
The human high-level visual cortex comprises regions specialized for the processing of distinct types of stimuli, such as objects, animals, and human actions. How does this specialization emerge? Here, we investigated the role of effector-specific visuomotor coupling experience in shaping the organization of the action observation network (AON) as a window on this question. Observed body movements are frequently coupled with corresponding motor codes, e.g., during monitoring one's own movements and imitation, resulting in bidirectionally connected circuits between areas involved in body movements observation (e.g., of the hand) and the motor codes involved in their execution. If the organization of the AON is shaped by this effector-specific visuomotor coupling, then, it should not form for body movements that do not belong to individuals' motor repertoire. To test this prediction, we used fMRI to investigate the spatial arrangement and functional properties of the hand and foot action observation circuits in individuals born without upper limbs. Multivoxel pattern decoding, pattern similarity, and univariate analyses revealed an intact hand AON in the individuals born without upper limbs. This suggests that the organization of the AON does not require effector-specific visuomotor coupling.
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