The Cross-Sectional Areas and Anterior-Posterior Balance of the Cervical Paraspinal Muscles in Dropped Head Syndrome and Cervical Spondylotic Myelopathy: A Propensity Score-Matched Analysis

被引：0

作者：

Sono, Takashi ^{[1
]}

Ijiri, Kenta ^{[1
]}

Kakehi, Kensaku ^{[1
]}

Masuda, Soichiro ^{[1
]}

Shimizu, Takayoshi ^{[1
]}

Murata, Koichi ^{[1
]}

Matsuda, Shuichi ^{[1
]}

Otsuki, Bungo ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Med, Dept Orthopaed Surg, Kyoto, Japan

来源：

JOR SPINE | 2025年 / 8卷 / 01期

基金：

日本学术振兴会;

关键词：

anterior-posterior muscle balance; Dropped head syndrome; longus colli muscle; semispinalis cervicis muscle; SAGITTAL ALIGNMENT; FATTY DEGENERATION; CUFF;

D O I：

10.1002/jsp2.70047

中图分类号：

R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];

学科分类号：

摘要：

Introduction: Dropped head syndrome (DHS) is characterized by weakness of the neck extensor muscles. However, few studies have assessed the cross-sectional areas (CSAs) of the cervical paraspinal muscles (CPM) and their anterior-posterior balance in DHS. This study aimed to elucidate the pathognomonic findings of DHS by comparing the CSAs and anterior-posterior balance of the CPM in patients with DHS and cervical spondylotic myelopathy (CSM), using magnetic resonance imaging (MRI). Methods: We compared the CSAs and anterior-posterior balance of the CPM in patients with DHS and CSM using MRI. Patients with CSM were selected in an age- and sex-matched manner, using the propensity score. The longus colli (LC) muscle was selected as the anterior muscle; and the semispinalis cervicis (SSC), splenius capitis (SC), and multifidus muscles (MM) were selected as the posterior muscles. We calculated LC/SSC, LC/SC, LC/MM, and LC/(SSC + SC + MM), as indicators of neck muscle balance. Results: The DHS and the CSM cohort comprised 26 and 52 patients, respectively. Both cohorts had a mean age of 71-year-old. There were no significant differences in the CSAs and most of the indicators of neck balance between the two cohorts. However, the LC/SSC was significantly higher in the DHS cohort than that in the CSM cohort (40.3% and 29.1%, respectively; p < 0.01). Conclusions: Our study highlights a unique anterior-posterior imbalance in the CPM of DHS patients, differing from CSM patients. Strengthening the SSC muscle could be a key to preventing DHS progression.

引用

页数：6