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Published on: October 10, 2020
Control of positioning the cervical spine and its application to measuring extensor strength
F Queisser1, R Blüthner, H Seidel
1Medizinische Fakultät der Humboldt-Universität (Charité), Zentrum für Zahn-, Mund- und Kieferheilkunde, Abteilung Zahnerhaltung, Germany.
Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
Summary
This study developed a method for precise cervical spine positioning, eliminating gravity effects. Maximum neck extensor strength tended to decrease with increased cervical spine flexion.
Area of Science:
- Biomechanics
- Kinesiology
- Human Anatomy
Background:
- Cervical spine flexion variability complicates positional control.
- Accurate measurement of neck muscle strength requires precise positioning.
Purpose of the Study:
- To develop a method for precise cervical spine and head positioning in the sagittal plane.
- To assess the reproducibility of this positioning method.
- To investigate the effect of cervical spine flexion on neck extensor strength.
Main Methods:
- Developed a method for passive gravity compensation to eliminate its effect on neck muscles.
- Measured external anatomical landmarks and distances for reproducibility.
- Assessed maximum voluntary strength of neck extensors in 12 males at varying flexion angles (0-30 degrees).
Main Results:
- The developed positioning method demonstrated good reproducibility.
- Passive gravity compensation effectively eliminated gravity's influence.
- Maximum voluntary moments of neck extensors showed a decreasing trend with increasing cervical spine flexion.
Conclusions:
- The new method allows precise control of cervical spine positioning.
- Cervical spine flexion influences neck extensor strength, with a decrease observed at higher flexion angles.
