Lycett Mitchell J, Lee James, Boland-Freitas Robert, Ng Karl
Department of Neurology and Clinical Neurophysiology, Royal North Shore Hospital, St Leonards, New South Wales, Australia.
The University of Sydney, Camperdown, New South Wales, Australia.
Muscle Nerve. 2025 Apr;71(4):600-605. doi: 10.1002/mus.28361. Epub 2025 Jan 31.
INTRODUCTION/AIMS: The sarcolemma can be probed in vivo using muscle excitability recordings. These techniques have been applied to the tibialis anterior and brachioradialis muscles in healthy and diseased states. We aimed to study and validate the trapezius as a more proximal muscle to be used for myopathic conditions.
Muscle velocity recovery cycles (MVRCs) and frequency ramp recordings were performed on the trapezius of 29 healthy controls. These recordings were compared to tibialis anterior recordings from 74 healthy controls.
Overall, the recorded MVRC and frequency ramp recordings were similar between the trapezius and tibialis anterior. The mean relative refractory period (MRRP) was shorter in the trapezius (3.29 vs. 3.71 ms), but this is explained by differences in muscle temperature.
The trapezius demonstrates similar MVRC and frequency ramp parameters to the more commonly studied tibialis anterior. The trapezius is technically easy to study using muscle excitability techniques and therefore presents itself as a promising muscle to study sarcolemmal properties in conditions that preferentially affect the proximal musculature.
引言/目的：可通过肌肉兴奋性记录在体内探测肌膜。这些技术已应用于健康和患病状态下的胫前肌和肱桡肌。我们旨在研究并验证斜方肌作为一种更靠近近端的肌肉用于肌病情况。
对29名健康对照者的斜方肌进行肌肉速度恢复周期（MVRCs）和频率斜坡记录。将这些记录与74名健康对照者的胫前肌记录进行比较。
总体而言，斜方肌和胫前肌记录的MVRC和频率斜坡记录相似。斜方肌的平均相对不应期（MRRP）较短（3.29对3.71毫秒），但这可由肌肉温度差异来解释。
斜方肌表现出与更常研究的胫前肌相似的MVRC和频率斜坡参数。使用肌肉兴奋性技术在技术上易于研究斜方肌，因此它是一种很有前景的肌肉，可用于研究在优先影响近端肌肉组织的情况下的肌膜特性。
