Motor unit recruitment strategies investigated by surface EMG variables
نویسندگان
چکیده
منابع مشابه
Motor unit recruitment strategies investigated by surface EMG variables.
During isometric contractions of increasing strength, motor units (MUs) are recruited by the central nervous system in an orderly manner starting with the smallest, with muscle fibers that usually show the lowest conduction velocity (CV). Theory predicts that the higher the velocity of propagation of the action potential, the higher the power at high frequencies of the detected surface signal. ...
متن کاملSpectral properties of the surface EMG can characterize/do not provide information about motor unit recruitment strategies and muscle fiber type POINT: SPECTRAL PROPERTIES OF THE SURFACE EMG CAN CHARACTERIZE MOTOR UNIT RECRUITMENT STRATEGIES AND MUSCLE FIBER TYPE
Fiber types. Human muscles have different fiber types such as fastand slow-twitch (1, 10) or type I and II fibers. The different fibers have different force-generating capacities (5) and are task specific. Since shortening speed does not always reflect the ATPase activity, the discrimination between type I and II fibers is based on the rate of myofibrilar ATPase reaction. Human MHC isoforms are...
متن کاملSpectral properties of the surface EMG can characterize/do not provide information about motor unit recruitment strategies and muscle fiber type POINT: SPECTRAL PROPERTIES OF THE SURFACE EMG CAN CHARACTERIZE MOTOR UNIT RECRUITMENT STRATEGIES AND MUSCLE FIBER TYPE
Fiber types. Human muscles have different fiber types such as fastand slow-twitch (1, 10) or type I and II fibers. The different fibers have different force-generating capacities (5) and are task specific. Since shortening speed does not always reflect the ATPase activity, the discrimination between type I and II fibers is based on the rate of myofibrilar ATPase reaction. Human MHC isoforms are...
متن کاملMotor Unit Distribution Estimation by Multi- Channel Surface Emg
A new method for the non invasive estimation of motor unit distribution within the muscle is proposed. It is based on the surface EMG signal detected at different contraction levels in single differential configuration from an array of electrodes placed over the considered muscle in the direction orthogonal to the fibres.
متن کاملMotor unit recruitment strategies are altered during deep-tissue pain.
Muscle pain is associated with decreased motor unit discharge rate during constant force contractions. As discharge rate is a determinant of force, other adaptations in strategy must explain force maintenance during pain. Our aim was to determine whether motor unit recruitment strategies are altered during pain to maintain force despite reduced discharge rate. Motor unit discharge behavior was ...
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ژورنال
عنوان ژورنال: Journal of Applied Physiology
سال: 2002
ISSN: 8750-7587,1522-1601
DOI: 10.1152/jappl.2002.92.1.235