A high-resolution large array (HRLA) surface EMG system.

A high-resolution large-array (HRLA) SEMG system comprising 256 separate channels has been developed. SEMG signals are detected by a "bracelet" active electrode array connected to a stack of newly designed biopotential instrumentation amplifiers. A stand-alone data logger acquires and stores the array EMG activity at high sampling rates. A RISC multiprocessor network supports computationally-intensive array signal processing and analysis algorithms. In addition, an improved optoelectronic system for the measurement of human body kinematics has been associated to the HRLA SEMG system to provide the related mechanical characteristics of muscle activity. Analysis results demonstrate that high-resolution muscle fibre conduction velocity histograms can be obtained even from skeletal muscles in which a large number of motor units are simultaneously activated.

[1]  M Miyashita,et al.  Muscle fiber conduction velocity and contractile properties estimated from surface electrode arrays. , 1990, Electroencephalography and clinical neurophysiology.

[2]  R. Cantello,et al.  Conduction velocity along human muscle fibers in situ , 1983, Neurology.

[3]  T Sadoyama,et al.  Skeletal muscles from which the propagation of motor unit action potentials is detectable with a surface electrode array. , 1987, Electroencephalography and clinical neurophysiology.

[4]  T. Masuda,et al.  The propagation of single motor unit action potentials detected by a surface electrode array. , 1985, Electroencephalography and clinical neurophysiology.

[5]  J. Capon.  High-resolution frequency-wavenumber spectrum analysis , 1969 .

[6]  Corporate Inmos Limited.  Transputer Reference Manual , 1988 .

[7]  D. May,et al.  The transputer , 1989 .

[8]  John G. Webster,et al.  Reductionl of Interference Due to Common Mode Voltage in Biopotential Amplifiers , 1983, IEEE Transactions on Biomedical Engineering.

[9]  D.E. Dudgeon,et al.  Fundamentals of digital array processing , 1977, Proceedings of the IEEE.

[10]  T. Masuda,et al.  A surface electrode array for detecting action potential trains of single motor units. , 1985, Electroencephalography and clinical neurophysiology.

[11]  T. Masuda,et al.  The propagation of motor unit action potential and the location of neuromuscular junction investigated by surface electrode arrays. , 1983, Electroencephalography and clinical neurophysiology.

[12]  M. Yamada,et al.  The distribution and propagation pattern of motor unit action potentials studied by multi-channel surface EMG. , 1987, Electroencephalography and clinical neurophysiology.

[13]  S. Andreassen,et al.  Muscle fibre conduction velocity in motor units of the human anterior tibial muscle: a new size principle parameter. , 1987, The Journal of physiology.

[14]  T. Sadoyama,et al.  Topographical map of innervation zones within single motor units measured with a grid surface electrode , 1988, IEEE Transactions on Biomedical Engineering.

[15]  R. Taylor.  Signal processing with occam and the transputer , 1984 .

[16]  J. G. Harp,et al.  Signal processing with transputer arrays (TRAPS) , 1985 .

[17]  John G. Webster,et al.  Driven-right-leg circuit design , 1983, IEEE Transactions on Biomedical Engineering.

[18]  M Miyashita,et al.  Muscle fiber conduction velocity related to stimulation rate. , 1989, Electroencephalography and clinical neurophysiology.

[19]  A. Willem Monster,et al.  A System for the Rapid Acquisition of Surface Potential Maps of Human Skeletal Muscle Motor Units , 1980, IEEE Transactions on Biomedical Engineering.

[20]  T. Masuda,et al.  The distribution of myoneural junctions in the biceps brachii investigated by surface electromyography. , 1983, Electroencephalography and clinical neurophysiology.