Motor impairment evoked by direct electrical stimulation of human parietal cortex during object manipulation

NeuroImage

Marco Rossi¹  Guglielmo Puglisi²  Henrietta Howells³  Andrea Bellacicca⁴  Gabriella Cerri⁵  Luca Viganò⁶  Lorenzo Bello⁶  Luca Fornia⁶  Antonella Leonetti⁶  Vincenzo Callipo⁶  Marco Rabuffetti⁷  Luciano Simone⁷ 

[1] IRCCS Fondazione Don Carlo Gnocchi, Milano, Italy;Neuroscience, Center for Human Technologies, Istituto Italiano di Tecnologia, Genoa, Italy;;Cognition, Motion &IRCCS Fondazione Don Carlo Gnocchi, Milano, Italy;Laboratory of Motor Control, Department of Medical Biotechnologies and Translational Medicine, Università degli Studi di Milano, Humanitas Research Hospital IRCSS, Rozzano, Milano, Italy;Laboratory of Motor Control, Department of Medical Biotechnologies and Translational Medicine, Università degli Studi di Milano, Italy;Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Università degli Studi di Milano, Italy;

关键词: Human Parietal cortex;    motor control;    hand-manipulation;    EMG;    intraoperative stimulation;   

DOI  :  

来源: DOAJ

【 摘 要 】

In primates, the parietal cortex plays a crucial role in hand-object manipulation. However, its involvement in object manipulation and related hand-muscle control has never been investigated in humans with a direct and focal electrophysiological approach. To this aim, during awake surgery for brain tumors, we studied the impact of direct electrical stimulation (DES) of parietal lobe on hand-muscles during a hand-manipulation task (HMt). Results showed that DES applied to fingers-representation of postcentral gyrus (PCG) and anterior intraparietal cortex (aIPC) impaired HMt execution. Different types of EMG-interference patterns were observed ranging from a partial (task-clumsy) or complete (task-arrest) impairment of muscles activity. Within PCG both patterns coexisted along a medio (arrest)–lateral (clumsy) distribution, while aIPC hosted preferentially the task-arrest. The interference patterns were mainly associated to muscles suppression, more pronounced in aIPC with respect to PCG. Moreover, within PCG were observed patterns with different level of muscle recruitment, not reported in the aIPC. Overall, EMG-interference patterns and their probabilistic distribution suggested the presence of different functional parietal sectors, possibly playing different roles in hand-muscle control during manipulation. We hypothesized that task-arrest, compared to clumsy patterns, might suggest the existence of parietal sectors more closely implicated in shaping the motor output.

【 授权许可】

Unknown