Sampath Ananyan, Kulkarni Avani, G Revadi, Patel Manmohan, Rathinam Bertha A
Medicine, All India Institute of Medical Sciences, Bhopal, Bhopal, IND.
Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND.
Cureus. 2022 Mar 15;14(3):e23199. doi: 10.7759/cureus.23199. eCollection 2022 Mar.
Introduction The ability of adaptation is unique to humankind. Technology advances have introduced many appliances that increasingly are smaller in size and handheld. These devices on prolonged usage affect the thumb joint complex, and this study was therefore designed to assess any changes in the movement of the thumb joint complex and fatigability secondary to the increasing usage of smartphones in different orientations in the Central Indian population. Materials and methods An analytical cross-sectional study was performed to assess changes in the ranges of motion (ROM) of the thumb joint complex with a sample size of 137 selected nonrandomly and categorized on the basis of the orientation of smartphone usage by physical goniometer and a standardized questionnaire to assess fatigability. Results Most movements of the thumb joint complex corresponded to the existing standard values. The study found significant changes in the movement of passive flexion of the left metacarpophalangeal (MCP) joint and borderline significant modifications in the active extension of the left interphalangeal (IP) joint, passive extension of the left interphalangeal joint, and passive flexion of the left carpometacarpal (CMC) joint among the groups of participants. The Borg CR10 value of fatigue was "one," indicative of no excessive fatigue after smartphone usage. Conclusion There are no significant changes in the ranges of motion of the joint complex of the thumb in mobile phone users over a period of time. The orientations and the increased duration of usage also did not cause any fatigue in the muscles of the thumb.
引言 适应能力是人类独有的。技术进步带来了许多尺寸越来越小且便于手持的设备。这些设备的长期使用会影响拇指关节复合体，因此本研究旨在评估印度中部人群中，因不同方向使用智能手机频率增加，拇指关节复合体运动及疲劳性是否发生任何变化。材料与方法 进行了一项分析性横断面研究，以评估拇指关节复合体的活动范围（ROM）变化，样本量为137名，采用非随机抽样，并通过物理量角器和标准化问卷根据智能手机使用方向进行分类，以评估疲劳性。结果 拇指关节复合体的大多数运动与现有标准值相符。研究发现，在参与者组中，左掌指（MCP）关节被动屈曲运动有显著变化，左指间（IP）关节主动伸展、左指间关节被动伸展和左手掌腕（CMC）关节被动屈曲有临界显著变化。疲劳的Borg CR10值为“1”，表明使用智能手机后无过度疲劳。结论 一段时间内，手机用户拇指关节复合体的活动范围没有显著变化。使用方向和使用时间的增加也未导致拇指肌肉出现任何疲劳。
