通过肌内压力评估骨骼肌机电延迟。
Evaluating skeletal muscle electromechanical delay with intramuscular pressure.
作者信息
Go Shanette A, Litchy William J, Evertz Loribeth Q, Kaufman Kenton R
机构信息
Department of Orthopedic Surgery, Mayo Clinic Rochester, 200 1st Street SW, Rochester, MN 55905, USA; Mayo Clinic School of Medicine, Mayo Clinic Rochester, 200 1st Street SW, Rochester, MN 55905, USA.
Department of Neurology, Mayo Clinic Rochester, 200 1st Street SW, Rochester, MN 55905, USA.
出版信息
J Biomech. 2018 Jul 25;76:181-188. doi: 10.1016/j.jbiomech.2018.05.029. Epub 2018 Jun 8.
INTRODUCTION
Intramuscular pressure (IMP) is the fluid pressure generated within skeletal muscle and directly reflects individual muscle tension. The purpose of this study was to assess the development of force, IMP, and electromyography (EMG) in the tibialis anterior (TA) muscle during ramped isometric contractions and evaluate electromechanical delay (EMD).
METHODS
Force, EMG, and IMP were simultaneously measured during ramped isometric contractions in eight young, healthy human subjects. The EMD between the onset of force and EMG activity (Δt-EMG force) and the onset of IMP and EMG activity (Δt EMG-IMP) were calculated.
RESULTS
A statistically significant difference (p < 0.05) was found between the mean force-EMG EMD (36 ± 31 ms) and the mean IMP-EMG EMD (3 ± 21 ms).
CONCLUSIONS
IMP reflects changes in muscle tension due to the contractile muscle elements.
引言
肌内压（IMP）是骨骼肌内产生的流体压力，直接反映单个肌肉的张力。本研究的目的是评估在递增等长收缩过程中胫骨前肌（TA）的力量、肌内压和肌电图（EMG）的变化，并评估机电延迟（EMD）。
方法
在8名年轻健康的人类受试者进行递增等长收缩时，同时测量力量、肌电图和肌内压。计算力量开始与肌电图活动之间的机电延迟（Δt-EMG力量）以及肌内压开始与肌电图活动之间的机电延迟（Δt EMG-IMP）。
结果
平均力量-肌电图机电延迟（36±31毫秒）与平均肌内压-肌电图机电延迟（3±21毫秒）之间存在统计学显著差异（p<0.05）。
结论
肌内压反映了由于收缩性肌肉成分导致的肌肉张力变化。
Zotero 插件