• Zexian Liu, Junjie Chen, Duopei Fang, Yejie Xu, Xinying Zhou, Zhiyang Zheng, Zhenfeng Zhang, Chaohui Fan, Shiwen Luo, Zezheng Liu, Qingchu Li, and Qinghao Zhao.
• Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, China.
• Spine. 2024 Jun 1; 49 (11): E164E172E164-E172.

Study DesignAnatomical study.ObjectiveThis study aimed to elaborate on the anatomical characteristics of the medial branch of the lumbar dorsal rami and to discuss its possible clinical significance.Summary Of Background DataRadiofrequency ablation targeting the medial branch of the lumbar dorsal rami has been increasingly used in the clinical management of facetogenic low back pain (FLBP). Nonetheless, attention is also being given to complications such as atrophy of the lumbar soft tissues and muscles. Therefore, a more detailed understanding of the innervation pattern on the facet joint may improve the precision of nerve ablation therapy for FLBP.MethodsAn anatomical study of eight human specimens was carried out. The anatomic characteristics of the medial branch were observed and recorded.ResultsThe medial branch originates from the lumbar dorsal rami, running close to the root of the posterolateral side of the superior articular process of the inferior cone. When passed through the mamillo-accessory ligament, it turns direction to the medial and caudal side, running in the multifidus muscle. In our study, each medial branch sent out two to five branches along the way. All the medial branches in L1-L4 gave off one to two small branches when crossing the facet joint and innervated the joint of the lower segment. Nineteen medial branches (23.75%) gave off recurrent branches to innervate the joint at the upper segment.ConclusionThe anatomical features of the medial branch remain similar in each lumbar segment. There are two types of joint branches, including the articular fibers that emanate from the medial branch as it runs along the medial border of the facet joint and the recurrent branch from the medial branch that innervates the upper facet joint. Moreover, an anastomotic branch was found in the medial branches between different segments.Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.

17 keywords...

hide…