Convolutional neural network in upper limb functional motion analysis after stroke

• Main Authors: Agnieszka Szczęsna, Monika Błaszczyszyn, Aleksandra Kawala-Sterniuk
• Format: Article
• Language: English
• Published: PeerJ Inc. 2020-10-01
• Series: PeerJ
• Subjects: Convolutional neural network; Hyperparameters; Functional motion analysis; Stroke; Lifting movements; Optical motion capture
• Online Access: https://peerj.com/articles/10124.pdf

In this work, implementation of Convolutional Neural Network (CNN) for the purpose of analysis of functional upper limb movement pattern was applied. The main aim of the study was to compare motion of selected activities of daily living of participants after stroke with the healthy ones (in similar age). The optical, marker-based motion capture system was applied for the purpose of data acquisition. There were some attempts made in order to find the existing differences in the motion pattern of the upper limb. For this purpose, the motion features of dominant and non-dominant upper limb of healthy participants were compared with motion features of paresis and non-paresis upper limbs of participants after stroke. On the basis of the newly collected data set, a new CNN application was presented to the classification of motion data in two different class label configurations. Analyzing individual segments of the upper body, it turned out that the arm was the most sensitive segment for capturing changes in the trajectory of the lifting movements of objects.