Analysis of electrical activity of normal muscle in man at different degrees of voluntary effort.
نویسندگان
چکیده
Electrical activity during voluntary effort was analysed in 33 normal subjects. Parameters of activity measured were number of peaks, mean amplitude, distribution of time intervals and of amplitudes between peaks. Recording from 10 sites evenly distributed over a muscle gave adequate representation of activity; force should be a fixed proportion of maximum rather than constant.
منابع مشابه
The effect of focus of attention on electromyography activity of the rectus abdominus muscle in vertical jump
Various studies have shown that the external focus of attention is better than the internal focus of attention. But, so far no study has been investigated the level of electrical activity of the rectus abdominus muscle as a trunk stabilizer muscle. Therefore, the purpose of this study was to investigate the effect of focus of attention on electromyography activity of the rectus abdominus muscle...
متن کاملCorrespondence between the directional patterns of hip muscle activation and their mechanical action in man.
The hypothesis that the pattern of muscle activation during a static voluntary effort exerted in different directions is oriented in the direction of the muscle's mechanical action was evaluated. The electromyographical (EMG) activation patterns of five hip muscles (gluteus medius, rectus femoris, tensor fasciae latae, gracilis and semitendinosus) and one knee muscle (vastus lateralis) were cha...
متن کاملDoes Muscle Fatigue Alter EEG Bands of Brain Hemispheres?
Background: Muscle fatigue has been known to influence brain activity, but very little is known about how cortical centers respond to muscle fatigue.Objective: This study was conducted to investigate the effects of muscle contraction and fatigue induced by two different percents of maximal voluntary contraction (MVC) on Electroencephalography (EEG) signals.Material and Methods: In t...
متن کاملIs Abdominal Muscle Activity Different from Lumbar Muscle Activity during Four-Point Kneeling?
Background: Stabilization exercises can improve the performance of trunk and back muscles, which are effective in the prevention and treatment of low back pain. The four-point kneeling exercise is one of the most common types of stabilization exercises. This quasi-experimental study aimed to evaluate and compare the level of activation between abdominal and lumbar muscles in the different stage...
متن کاملImpact of vehicle seat back inclination on occupational driving safety
This study determined effect of automobile seat backrest inclination on lattisimus dorsi muscle electromyographic (EMG) activity. Myoelectric activity was determined at two seat backrest angles (90 degrees and 100 degrees inclinations). Twenty-one (21) participants were engaged in the study. Electromygraphic activity at 90 degrees inclination had slope value of -0.065 mV/minute while ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of neurology, neurosurgery, and psychiatry
دوره 38 7 شماره
صفحات -
تاریخ انتشار 1975