• Haiyan Li, Xuexiao Ma, Xiaolin Wu, Fengxia Liu, Tengbo Yu, Bin Yue, Hongfei Xiang, and Bohua Chen.
• From the Department of Orthopedics, The Affiliated Hospital of Qingdao University, Qingdao, China.
• Spine. 2014 Dec 15;39(26):2119-26.

Study DesignHistological study of human living tissue.ObjectiveTo determine sympathetic fiber in the cervical posterior longitudinal ligaments (PLL) obtained from the patients undergoing anterior cervical decompression surgery, and speculate the implication of their presence and distribution.Summary Of Background DataThe pathogenic mechanism responsible for cervical spondylosis remains unclear. Cervical vertigo is often confused with aural vertigo, and central vertigo, and et al. It has been gradually realized that mechanical interference to the vertebral artery is not the only way to explain the pathogenic mechanism of cervical vertigo. It should be noted that the sympathetic factor may also involve it because some sympathetic nerves were found in the PLL in an animal study of intervertebral discs. Although it is unclear whether there is a similar phenomenon in adult human PLL.MethodsForty-six patients who received anterior cervical decompression surgery in The Affiliated Hospital of Qingdao University from January 2013 to December 2013 were classified into 2 groups: with cervical spondylosis and with cervical trauma. Cervical PLL tissues of all the participants were obtained during operation. The paraffin slices of the ligament were stained according to glyoxylic acid-induced fluorescent method. The morphology and distribution of sympathetic nerve fibers were observed by measuring and analyzing fluorescent units expressed on different sections. The positive rates expressed by fluorescent staining were statistically analyzed.ResultsDifferent forms of sympathetic nerve fibers distribution were observed in the 3-dimensional slices in each group selected from 46 cases of specimens. The positive rate of fluorescent units detected from the cervical PLL in patients experiencing cervical spondylosis was not significantly different from that in cervical trauma group (x = 0.969, P > 0.05).ConclusionSympathetic nerve fibers were confirmed to distribute in the human cervical posterior longitudinal ligament.Level Of Evidence2.

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