《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2021, Vol. 27 ›› Issue (11): 1253-1259.doi: 10.3969/j.issn.1006-9771.2021.11.003

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Space of Range of Motion of Index Finger and Application

WANG Feng-li1,2,CHEN Zhi-xiang1,2(),RUAN Jing3,HE Sheng-min1,2   

  1. 1. College of Computer Science, Minnan Normal University, Zhangzhou, Fujian 363000, China
    2. Key Laboratory of Data Science and Intelligence Application, Zhangzhou, Fujian 363000, China
    3. Department of Rehabilitation Medicine, 909 Hospital of the Joint Service Support Force of Chinese People's Liberation Army (The Affiliated Dongnan Hospital of Xiamen University), Zhangzhou, Fujian 363000, China
  • Received:2020-02-04 Revised:2021-08-02 Published:2021-11-25 Online:2021-12-03
  • Contact: CHEN Zhi-xiang E-mail:zxchenphd@163.com
  • Supported by:
    Fujian Education and Scientific Research Project for Young and Middle-aged Teachers(JAT191414);Minnan Normal University Graduate Education Reform Project(MSYJG8);Zhangzhou Natural Science Foundation(ZZ2020J33)

Abstract:

Objective To measure the space of motion of index finger with and without injury, to apply it in rehabilitation.Methods Thirty healthy undergraduate volunteers (controls) and three undergraduate volunteers with recent index finger injury (patients) were asked to flex, extend, adduct, abduct and ring the index finger independently and combined with middle finger, twice for a motion with an interval of 30 seconds. The index finger movement trajectory was recorded with a high-definition camera, and analyzed the range of flexion, extension, adduction, abduction and ring rotation motion with MATLAB. The movement space and defect of the injured fingers were drawn.Results The ranges of independent flexion-extension and adduction-abduction reduced 26.5% and 24.6% in the patients compared with those of the controls, respectively. The defects of ring rotation space were very different with the degrees of recovery, and the maximum loss happened on 160°, 70° and 170°.Conclusion Loss in index fingers motion space in range and direction may help for rehabilitation assessment.

Key words: index finger, range of motion, injury