1. A radiographic investigation of cervical spine kinematics when reading a tablet in a reclined trunk position.
- Author
-
Douglas EC and Gallagher KM
- Subjects
- Biomechanical Phenomena, Female, Gravitation, Humans, Male, Radiography, Reading, Torso physiology, Young Adult, Cervical Vertebrae diagnostic imaging, Cervical Vertebrae physiology, Computers, Handheld, Neck diagnostic imaging, Neck physiology, Posture
- Abstract
The purpose of this study was to use radiographic measurements to compare cervical spine kinematics in various tablet computer reading postures. Radiographs were taken of twenty-two participants reading a tablet computer in five different postures. The lower cervical spine was more flexed in the semi-reclined (-8.2 ± 3.8°) and the reclined (-14.9 ± 4.0°) tablet positions compared to an upright (-4.43 ± 4.8°) tablet posture. Of the tablet reading positions, the reclined position had the lowest gravitational moment arm (5.2 ± 2.3 cm) and a skull angle closest to neutral (-9.4 ± 11.4°), while exhibiting the largest extension in the C1-C2 joint (34.4 ± 9.1°). Altering trunk position when reading a tablet could reduce the load required to support the head, but could put the head in a more forward head posture, stretch the cervical extensor muscles, and potentially result in pain., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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