Kishimoto Tomoya, Kuniyasu Kastushi, Suehiro Tadanobu, Kobara Kenichi
Department of Rehabilitation, Watanabe Hospital, Niimi, Japan.
Graduate School of Health Science and Technology, Kawasaki University of Medical Welfare, Kurashiki, Japan.
J Exerc Rehabil. 2019 Oct 28;15(5):696-702. doi: 10.12965/jer.1938502.251. eCollection 2019 Oct.
The present study examined muscle activity in response to backward perturbation in patients with clinical vertebral compression fracture (CVCF). The subjects were 32 patients aged 65 years and above consisting of 16 each with (CVCF group) and without (control group) CVCF. The time to peak activity, and time of onset of muscle activity of the anterior tibial, vastus medialis, and rectus abdominis muscles when unexpected backward perturbation was applied were evaluated by surface electromyography. The strength of perturbation was 4% or 6% of the subject's body weight. In addition, the presence of the stepping reaction to perturbation, severity of low back pain, and vertebral alignment were evaluated. Each item was compared between the two groups. In the CVCF group, kyphosis and severity of low back pain were significantly more severe, the time to peak activity of the anterior tibial muscle after the application of perturbation at 6% of the body weight was significantly shorter, and the time of onset of activity of the rectus abdominis muscle was significantly delayed. This suggests that the time to peak activity of the anterior tibial muscle is shortened and the time of onset of activity of the rectus abdominis muscle is delayed in unexpected backward perturbation in patients with CVCF.
本研究检测了临床椎体压缩性骨折（CVCF）患者对向后扰动的肌肉活动情况。研究对象为32名65岁及以上的患者，其中16名患有CVCF（CVCF组），另16名未患CVCF（对照组）。通过表面肌电图评估了施加意外向后扰动时，胫前肌、股内侧肌和腹直肌的峰值活动时间以及肌肉活动的起始时间。扰动强度为受试者体重的4%或6%。此外，还评估了对扰动的迈步反应、腰痛严重程度和椎体排列情况。对两组之间的各项指标进行了比较。在CVCF组中，脊柱后凸和腰痛严重程度明显更严重，施加6%体重的扰动后，胫前肌的峰值活动时间明显缩短，腹直肌的活动起始时间明显延迟。这表明，在CVCF患者受到意外向后扰动时，胫前肌的峰值活动时间缩短，腹直肌的活动起始时间延迟。
