Motor unit size estimation: confrontation of surface EMG with macro EMG
نویسندگان
چکیده
منابع مشابه
Motor unit size estimation: confrontation of surface EMG with macro EMG.
Surface EMG (SEMG) is little used for diagnostic purposes in clinical neurophysiology, mainly because it provides little direct information on individual motor units (MUs). One of the techniques to estimate the MU size is intra-muscular Macro EMG. The present study compares SEMG with Macro EMG. Fifty-eight channel SEMG was recorded simultaneously with Macro EMG. Individual MUPs were obtained by...
متن کاملMotor unit size in muscular dystrophy, a macro EMG and scanning EMG study.
Patients with muscular dystrophy were investigated with Macro EMG to study activity from whole individual motor units, and with Scanning EMG to study the distribution of activity within the motor unit. Macro motor unit potentials were normal or only slightly reduced in amplitude. In Scanning EMG the units had unchanged mean length compared with normal, but an uneven distribution of the activity...
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 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 کاملShort-term stability of single motor unit recordings in motor neuron disease: a macro EMG study.
Thirty five individual macro EMG motor unit potentials in 13 patients with motor neuron disease were recorded every 15 minutes during a 2 hour period. No significant change in amplitude or area was seen in 15 control units in nine patients or in 20 units in 11 patients receiving RX77368 0.2-0.3 mg/kg. The findings provide no evidence for an action of this long acting TRH analogue on the periphe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Electroencephalography and Clinical Neurophysiology/Electromyography and Motor Control
سال: 1997
ISSN: 0924-980X
DOI: 10.1016/s0924-980x(97)96670-4