Body schema plasticity after stroke: Subjective and neurophysiological correlates of the rubber hand illusion

NEUROPSYCHOLOGIA

卷:96

Article

Llorensa, Roberto^1,2,3  Borrego, Adrian¹  Palomo, Priscila⁴  Cebolla, Ausias^4,5  Noe, Enrique^2,3  Badiae, Sergi Bermudez I.⁶  Banos, Rosa^4,5 

[1] Univ Politecn Valencia, Inst Investigat & Innovat Bioingn, Neurorehabilitat & Brain Res Grp, Camino Vera sn, E-46022 Valencia, Spain

[2] Fundac Hosp NISA, Serv Neurorrehabilitac, Rio Tajo 1, Valencia 46011, Spain

[3] Fundac Hosp NISA, Dano Cerebral Hosp NISA, Rio Tajo 1, Valencia 46011, Spain

[4] Univ Valencia, Av Blasco Ibaiiez 13, Valencia 46010, Spain

[5] Fisiopatol Obesidad & Nutr CIBERobn, Madrid, Spain

[6] Univ Madeira, Madeira ITI, Campus Univ,Penteada, P-9020105 Funchal, Portugal

关键词: Body schema;    Body-ownership;    Embodiment;    Rubber hand illusion;    Stroke;    Neurophysiology;   

DOI  :  10.1016/j.neuropsychologia.2017.01.007

来源: Elsevier

【 摘 要 】

Stroke can lead to motor impairments that can affect the body structure and restraint mobility. We hypothesize that brain lesions and their motor sequelae can distort the body schema, a sensorimotor map of body parts and elements in the peripersonal space through which human beings embody the reachable space and ready the body for forthcoming movements. Two main constructs have been identified in the embodiment mechanism: body-ownership, the sense that the body that one inhabits is his/her own, and agency, the sense that one can move and control his/her body. To test this, the present study simultaneously investigated different embodiment subcomponents (body-ownership, localization, and agency) and different neurophysiological measures (galvanic skin response, skin temperature, and surface electromyographic activity), and the interaction between them, in clinically-controlled hemiparetic individuals with stroke and in healthy subjects after the rubber hand illusion. Individuals with stroke reported significantly stronger body-ownership and agency and reduced increase of galvanic skin response, skin temperature, and muscular activity in the stimulated hand. We suggest that differences in embodiment could have been motivated by increased plasticity of the body schema and pathological predominance of the visual input over proprioception. We also suggest that differences in neurophysiological responses could have been promoted by a suppression of the reflex activity of the sympathetic nervous system and by the involvement of the premotor cortex in the reconfiguration of the body schema. These results could evidence a body schema plasticity promoted by the brain lesion and a main role of the premotor cortex in this mechanism.

【 授权许可】

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