Motor recruitment during action observation: Effect of interindividual differences in action strategy
| Autor: | Elisa Dolfini, Alessandro D'Ausilio, Luciano Fadiga, Thierry Pozzo, Pasquale Cardellicchio, Pauline M. Hilt |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Recruitment Neurophysiological Multijoint actions Dissociation (neuropsychology) Cognitive Neuroscience medicine.medical_treatment Individuality Observation Kinematics Motor Activity 050105 experimental psychology NO Visual processing Young Adult 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine medicine Redundancy (engineering) Humans 0501 psychology and cognitive sciences AcademicSubjects/MED00385 Variability Electromyography AcademicSubjects/SCI01870 05 social sciences Brain Action observation Biomechanical Phenomena Transcranial magnetic stimulation Human musculoskeletal system medicine.anatomical_structure Action (philosophy) Cortical Excitability Motor unit recruitment Female AcademicSubjects/MED00310 Original Article Psychology 030217 neurology & neurosurgery Action observation Individual motor signatures Multijoint actions Transcranial magnetic stimulation Variability Individual motor signatures Cognitive psychology |
| Zdroj: | Cerebral Cortex Cerebral Cortex (New York, NY) |
| Popis: | Visual processing of other’s actions is supported by sensorimotor brain activations. Access to sensorimotor representations may, in principle, provide the top-down signal required to bias search and selection of critical visual features. For this to happen, it is necessary that a stable one-to-one mapping exists between observed kinematics and underlying motor commands. However, due to the inherent redundancy of the human musculoskeletal system, this is hardly the case for multijoint actions where everyone has his own moving style (individual motor signature—IMS). Here, we investigated the influence of subject’s IMS on subjects’ motor excitability during the observation of an actor achieving the same goal by adopting two different IMSs. Despite a clear dissociation in kinematic and electromyographic patterns between the two actions, we found no group-level modulation of corticospinal excitability (CSE) in observers. Rather, we found a negative relationship between CSE and actor-observer IMS distance, already at the single-subject level. Thus, sensorimotor activity during action observation does not slavishly replicate the motor plan implemented by the actor, but rather reflects the distance between what is canonical according to one’s own motor template and the observed movements performed by other individuals. |
| Databáze: | OpenAIRE |
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