Cervical spine reposition errors after cervical flexion and extension

BMC Musculoskeletal Disorders

Research Article

Thomas Graven-Nielsen¹  René Lindstroem²  Xu Wang³  Niels Peter Bak Carstens⁴ 

[1] Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health and Science Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej, 7D-39220, Aalborg, Denmark;SMI, Department of Health and Science Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7D-3, 9220, Aalborg E, Denmark;SMI, Department of Health and Science Technology, Faculty of Medicine, Aalborg University, Fredrik Bajers Vej 7D-3, 9220, Aalborg E, Denmark;Department of Orthopedics, The Second Hospital of Jilin University, Ziqiang 218, 130041, Changchun, Jilin, People’s Republic of China;Vejgaard Kiropraktisk Klinik, Aalborg, Denmark;

关键词: Spine;    Neck;    Fluoroscopy;    Cervical vertebrae;    Position sense;    Motion;    Flexion and extension;    Repositioning;   

DOI  :  10.1186/s12891-017-1454-z

 received in 2016-10-26, accepted in 2017-02-15,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundUpright head and neck position has been frequently applied as baseline for diagnosis of neck problems. However, the variance of the position after cervical motions has never been demonstrated. Thus, it is unclear if the baseline position varies evenly across the cervical joints. The purpose was to assess reposition errors of upright cervical spine.MethodsCervical reposition errors were measured in twenty healthy subjects (6 females) using video-fluoroscopy. Two flexion movements were performed with a 20 s interval, the same was repeated for extension, with an interval of 5 min between flexion and extension movements. Cervical joint positions were assessed with anatomical landmarks and external markers in a Matlab program. Reposition errors were extracted in degrees (initial position minus reposition) as constant errors (CEs) and absolute errors (AEs).ResultsTwelve of twenty-eight CEs (7 joints times 4 repositions) exceeded the minimal detectable change (MDC), while all AEs exceeded the MDC. Averaged AEs across the cervical joints were larger after 5 min’ intervals compared to 20 s intervals (p < 0.05).ConclusionsThis is the first study to demonstrate single joint reposition errors of the cervical spine. The cervical spine returns to the upright positions with a 2° average absolute difference after cervical flexion and extension movements in healthy adults.

【 授权许可】

CC BY   
© The Author(s). 2017