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• W3093074564 abstract "Objective To study the distribution of sympathetic nerves of the ligamentum flavum (LF), confirm its existence by histological observation and nuclear magnetic resonance spectroscopy, and analyze the relationship between sympathetic nerve fibers and the biomechanical structure of the LF. Methods Randomly controlled scientific research selected 15 cases of posterior surgery in the affiliated hospital of Qingdao University from January 2013 to December 2019. The average age was 67.5 ± 14.5 years old, eight males and seven females. The LF specimens (completely separated fresh tissue) of different segments (C 3‐7 ) were taken during the operation. Two pages of LF specimens on the left and right sides of the same segment are randomly allocated by the pairing method for formalin fixation and cryopreservation in liquid nitrogen. LF specimens extracted from seven other adult cadaver specimens (average age at death of about 56.8 ± 4.0 years, three males and four females) were used as a control group; together with formalin‐ fixed specimens obtained during surgery, 3D slices were given layer by layer. The distribution of sympathetic nerves in different parts of the LF was analyzed by glyoxylic acid‐induced biological monoamine fluorescent technique (SPG) and hematoxylin–eosin (HE) staining. Fifteen liquid nitrogen storage specimens were divided into the back of the LF and the spinal canal through frozen sections, and were analyzed by nuclear magnetic resonance spectroscopy‐hydrogen spectrum ( 1 H ‐NMR) for neurotransmitters and neurometabolites. Results There were type C sympathetic nerve fibers in the LF, which were divided into linear shape (α) and wave shape (β). Experimental group ( χ 2 = 1.705, P > 0.05) and control group ( χ 2 = 0.879, P > 0.05) can detect no difference in fluorescence units. Nerve fiber transmitter metabolites choline (Cho), creator (Cr), γ‐aminobutyric acid (GABA) also indicate that the sympathetic nerve is present in the LF. LF sympathetic nerve fibers were mainly distributed in the proximal spinal canal surface, nerve fibers on the medial belt (area II) were fewer than the lateral belt (area I) ( W = 210, P < 0.05). The 1 HNMR spectrum of LF spinal canal PG / Cho ( t = 8.721, P < 0.05), GABA ( t = 16.01, P < 0.05) value increased, lactic acid (Lac) / Cr ( t = 4.213, P < 0.05), Cho / Cr ( t = 2.402, P < 0.05) value decreased, indicating that nerve fibers are actively metabolized on the surface of the spinal canal, mainly distributed in tube surface. βtype fibers were more often distributed around microvessels. A small amount of α type fibers went next to the vascular structures, while α type fibers and β type fibers go cross within LF. Two patients with vertebral artery dissection had no recurrence of sympathetic symptoms within a total of 12 follow‐ups 2 years after discharge. Conclusions There are many sympathetic nerve fibers distributed on LF, and their distribution may be correlated with histological and mechanical characteristics of LF. It may also be the anatomical basis of cervical vertigo." @default.
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• W3093074564 date "2020-10-19" @default.
• W3093074564 modified "2023-10-18" @default.
• W3093074564 title "Histologic Observation and Significance of Sympathetic Nerve Fiber Distribution on Human Cervical Ligamentum Flavum" @default.
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• W3093074564 doi "https://doi.org/10.1111/os.12802" @default.
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