Latz David, Koukos Christos, Boeckers Petra, Jungbluth Pascal, Schiffner Erik, Kaufmann Robert, Gehrmann Sebastian Viktor
1 University Hospital, Düsseldorf, Germany.
2 University of Pittsburgh Medical Center, PA, USA.
Hand (N Y). 2019 Mar;14(2):259-263. doi: 10.1177/1558944717736823. Epub 2017 Oct 26.
The metacarpophalangeal joints exhibit range of motion that is influenced by wrist position. Synergistic motion occurs between the wrist and the metacarpophalangeal joints with different static wrist positions affecting joints' motion capability. The aim of this study was to determine how different wrist positions influence the active range of motion of the index through small finger metacarpophalangeal joints.
The active range of motion of the index through small finger metacarpophalangeal joints of 31 healthy subjects was measured in flexion/extension and radial/ulnar deviation in 5 different flexion/extension wrist positions, using biaxial electrogoniometers.
There was a difference in range of motion of all fingers depending on the wrist position. The minimum metacarpophalangeal joint range of motion was found in 80° wrist extension, the maximum in neutral wrist position. For the index finger, flexion/extension was 84.7° (±8.6°) to 25.9° (±10.2°) and radial/ulnar deviation was 32.1° (±11.3°) to 22.6° (±12.8°). For the middle finger, flexion/extension was 84.8° (±8.5°) to 25.9° (±10.1°) and radial/ulnar deviation 28.8° (±11.1°) to 22.1° (±8.9). The fourth finger showed a range of motion for flexion/extension of 87.2° (±11.5°) to 22.8° (±11.6°) and radial/ulnar deviation of 8.1° (±5.8°) to 32.3° (±12.4°). The highest range of motion was measured at the fifth finger with flexion/extension of 84.0° (±8.6°) to 32.1°(±16.8°) and radial/ulnar deviation of 15.1° (±12.9°) up to 54.6° (±18.7°).
The range of motion of the index through small finger metacarpophalangeal joints was significantly influenced by wrist position. The highest metacarpophalangeal joint range of motion of all fingers was conducted in neutral wrist positions. Apart from ergonomic implications, we conclude that metacarpophalangeal joint motion should be assessed under standardized wrist positions.
掌指关节的活动范围受腕部位置的影响。腕部和掌指关节之间会出现协同运动，不同的静态腕部位置会影响关节的运动能力。本研究的目的是确定不同的腕部位置如何影响示指至小指掌指关节的主动活动范围。
使用双轴电子角度计，在31名健康受试者的5种不同屈伸腕部位置下，测量示指至小指掌指关节在屈伸和桡偏/尺偏时的主动活动范围。
所有手指的活动范围因腕部位置而异。掌指关节活动范围最小值出现在腕部伸展80°时，最大值出现在腕部中立位时。示指的屈伸范围为84.7°（±8.6°）至25.9°（±10.2°），桡偏/尺偏范围为32.1°（±11.3°）至22.6°（±12.8°）。中指的屈伸范围为84.8°（±8.5°）至25.9°（±10.1°），桡偏/尺偏范围为28.8°（±11.1°）至22.1°（±8.9°）。环指的屈伸范围为87.2°（±11.5°）至22.8°（±11.6°），桡偏/尺偏范围为8.1°（±5.8°）至32.3°（±12.4°）。小指的活动范围最大，屈伸范围为84.0°（±8.6°）至32.1°（±16.8°），桡偏/尺偏范围为15.1°（±12.9°）至54.6°（±18.7°）。
示指至小指掌指关节的活动范围受腕部位置的显著影响。所有手指掌指关节活动范围最大值出现在腕部中立位时。除了对人体工程学的影响外，我们得出结论，掌指关节运动应在标准化的腕部位置下进行评估。
