Instrumentation for ENG and EMG recordings in FES systems

An electronic circuit for analog processing of neural (electroneurogram or ENG) and muscular (electromyogram or EMG) signals in functional electrical stimulation (FES) systems is described. The basic circuit consists of a low-noise gated preamplifier, bandpass filter, amplifier, and a blanking circuit to minimize stimulation artifacts during electrical stimulation. This device was tested in chronic recordings using a triphasic cliff electrode for nerves and epimysial electrodes for muscles in the hind limbs of cats. The device was used for nerve recordings in the presence of electrical stimulation of muscles in the same leg. The recordings showed rejection of stimulation and muscle (M-wave) artifacts, while retaining the information of interest.<<ETX>>

[1]  Gottlieb Gl,et al.  Filtering of electromyographic signals. , 1970 .

[2]  R. Stein,et al.  Principles Underlying New Methods for Chronic Neural Recording , 1975, Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques.

[3]  R. Stein,et al.  Stable long-term recordings from cat peripheral nerves , 1977, Brain Research.

[4]  Nitish V. Thakor,et al.  Ground-Free ECG Recording with Two Electrodes , 1980, IEEE Transactions on Biomedical Engineering.

[5]  Michael R. Neuman,et al.  Sensors for Use with Functional Neuromuscular Stimulation , 1986, IEEE Transactions on Biomedical Engineering.

[6]  R. Pallas-Areny,et al.  Interference-rejection characteristics of biopotential amplifiers: a comparative analysis , 1988, IEEE Transactions on Biomedical Engineering.

[7]  J. Hoffer,et al.  Obtaining skin contact force information from implanted nerve cuff recording electrodes , 1989, Images of the Twenty-First Century. Proceedings of the Annual International Engineering in Medicine and Biology Society,.

[8]  T. Sinkjaer,et al.  Whole Sensory Nerve Recordings In Human - An Application For Neural Prostheses , 1991, Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991.

[9]  Joaquin Andres Hoffer,et al.  Signals from tactile sensors in glabrous skin , 1991 .

[10]  P. Peckham.  Motor prosthesis for restoration of upper extremity function , 1992 .

[11]  D.B. Popovic,et al.  Sensory nerve recording for closed-loop control to restore motor functions , 1993, IEEE Transactions on Biomedical Engineering.