Journal ArticleDOI
Spectral Analysis of Pulse Frequency Modulation in the Nervous Systems
TLDR
Some results of an analysis of the spectrum of the frequency modulated pulses of the nervous system show that change in average pulse frequency is the likely information-carrying parameter of a neural pulse train.Abstract:
Spectral analysis is one of the more important design and evaluation tools available to the communications engineer and it could also be a key to increased understanding of the nervous system. Some results of an analysis of the spectrum of the frequency modulated pulses of the nervous system show that 1) change in average pulse frequency is the likely information-carrying parameter of a neural pulse train, since distortion-free recovery of this variable is possible by simple low-pass filtering, and 2) phase relationships existing between signal components and distortion components of a neural pulse train imply unusual distortion attenuating properties of multiple or duplicate information channels. These results are discussed in light of some known nervous system structures.read more
Citations
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Journal ArticleDOI
Extracting Simultaneous and Proportional Neural Control Information for Multiple-DOF Prostheses From the Surface Electromyographic Signal
TL;DR: A novel signal processing algorithm for the surface electromyogram (EMG) is proposed to extract simultaneous and proportional control information for multiple DOFs and a DOF-wise nonnegative matrix factorization is developed to estimate neural control information from the multichannel surface EMG.
Journal ArticleDOI
Comparing Spectra of a Series of Point Events Particularly for Heart Rate Variability Data
TL;DR: Both autospectra are equivalent for the considered heart rate data, but that, when relating the heart rate signal to other signals by means of cross spectra, the technique to be used depends on the characteristics of the second signal.
Journal ArticleDOI
Analysis of heart rate variability in the presence of ectopic beats using the heart timing signal
Javier Mateo,Pablo Laguna +1 more
TL;DR: The proposed method for PSD estimation of the HRV by means of the heart timing (HT) signal has one order of magnitude lower error than usual ectopic beats removal strategies in preserving PSD, thus, this strategy better recovers the original clinical indexes of interest.
Journal ArticleDOI
Power spectral density of unevenly sampled data by least-square analysis: performance and application to heart rate signals
TL;DR: It is concluded that for PSD estimation of unevenly sampled signals the Lomb method is more suitable than fast Fourier transform or autoregressive estimate with linear or cubic interpolation, but in extreme situations the Lomb estimate still introduces high-frequency contamination that suggest further studies of superior performance interpolators.
Journal ArticleDOI
Determination of the frequency response of isometric soleus muscle in the cat using random nerve stimulation.
Allan Mannard,Richard B. Stein +1 more
TL;DR: The frequency response of isometric soleus muscle was determined efficiently by analysis of the unfused tension generated during short periods of random stimulation of the divided ventral roots, in anaesthetized cats.
References
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Warren S. McCulloch,Walter Pitts +1 more
TL;DR: In this article, it is shown that many particular choices among possible neurophysiological assumptions are equivalent, in the sense that for every net behaving under one assumption, there exists another net which behaves under another and gives the same results, although perhaps not in the same time.
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An analysis of the end‐plate potential recorded with an intra‐cellular electrode
P. Fatt,Bernard Katz +1 more
TL;DR: The immediate concern of the present work is to determine the electric charge which passes through the end-plate membrane during the transmission of one impulse and to throw some light on the mechanism by which the transfer of ions across theend-plate is brought about.
Journal ArticleDOI
The electrical constants of a crustacean nerve fibre.
A. L. Hodgkin,William Rushton +1 more
TL;DR: The behaviour of lobster axons agreed with theoretical predictions in the following respects: (a) the steady extrapolar potential declined exponentially with distance; (b) the voltage gradient midway between two distant electrodes was uniform; (c) the rise and fall of the extrapolars at different distances conformed to the correct theoretical curves.
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