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Onset Detection to Study Muscle Activity in Reaching and Grasping Movements in Rats

文献类型： 会议论文

第一作者： Yolanda Castillo-Escario

作者： Yolanda Castillo-Escario 1 ; María Rodríguez-Ca?ón 2 ; Guillermo García-Alías 3 ; Raimon Jané 1 ;

作者机构： 1.Institute for Bioengineering of Catalonia (IBEC), the Barcelona Institute of Science and Technology (BIST), Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN) and ESAII Department, Universitat Politècnica de Catalunya - BarcelonaTech (UPC), Barcelona, Spain

2.IBEC, Institute of Neurosciences, Universitat Autònoma de Barcelona (UAB) and Centro de Investigación Biomédica en Red de Enfermedades Neurodegenrativas (CIBER-NED), Barcelona, Spain

3.UAB, CIBER-NED and the Guttmann Institute, Institut Universitari de Neurorehabilitació, Badalona, Spain

关键词： Muscle Activity;Reaching;Grasping Movements

会议名称： International Conference of the IEEE Engineering in Medicine and Biology Society

主办单位：

页码： 5113-5116

摘要： EMG signals reflect the neuromuscular activation patterns related to the execution of a certain movement or task. In this work, we focus on reaching and grasping (R&G) movements in rats. Our objective is to develop an automatic algorithm to detect the onsets and offsets of muscle activity and use it to study muscle latencies in R&G maneuvers. We had a dataset of intramuscular EMG signals containing 51 R&G attempts from 2 different animals. Simultaneous video recordings were used for segmentation and comparison. We developed an automatic onset/offset detector based on the ratio of local maxima of Teager-Kaiser Energy (TKE). Then, we applied it to compute muscle latencies and other features related to the muscle activation pattern during R&G cycles. The automatic onsets that we found were consistent with visual inspection and video labels. Despite the variability between attempts and animals, the two rats shared a sequential pattern of muscle activations. Statistical tests confirmed the differences between the latencies of the studied muscles during R&G tasks. This work provides an automatic tool to detect EMG onsets and offsets and conducts a preliminary characterization of muscle activation during R&G movements in rats. This kind of approaches and data processing algorithms can facilitate the studies on upper limb motor control and motor impairment after spinal cord injury or stroke.

分类号： r318-532

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[1]Intensive FES therapy and its effect on the upper limb motor recovery after stroke. N. Kawashima,V. Zivanovic,M.R. Popovic. 2009

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