Spectral composition of muscle spindle Ia responses to combined length and fusimotor inputs
It is well known that time and frequency domain analyses provide alternative methods for examining the properties of time series. It is less well known that interesting features of a data set may appear more clearly in one or another of these domains, although, theoretically, they contain the same information (Tukey, 1980). Time domain descriptions of spike trains are traditionally used by neurophysiologists, whereas frequency domain methods for examining the statistical properties of spike trains are not widely used. The purpose of the present report is to illustrate the useful -ness of spectral methods by pointing out an interesting feature of the muscle spindle Ia discharge in the presence of a simultaneously applied length and fusimotor input.
KeywordsSpike Train Muscle Spindle Frequency Domain Method Combine Length System Identification Technique
Unable to display preview. Download preview PDF.
- Brillinger, D.R. (1972). The spectral analysis of stationary interval functions. In Proceedings VIth Berkeley Symposium, Vol. 1 (eds. L.M. LeCam, J. Neyman and E.L. Scott) pp483–513. University of California Press, Berkeley.Google Scholar
- Brillinger, D.R. (1975a). Statistical inference for stationary point-processes. In Stochastic Processes and related topics, Vol. 1 (ed. M.I. Puri) pp55–79. Academic Press, New York.Google Scholar
- Brillinger, D.R. (1975b). Time Series data analysis and theory. 1st Edition. Holt, Rinehart and Winston Inc., London.Google Scholar
- Chen, W.J. & Poppele, R.E. (1978). Small signal analysis of response of mammalian muscle spindles with fusimotor stimulation and a comparison with large-signal responses. J. Neurophysiol. 41, 15–27.Google Scholar
- Goodwin, G.M., Hulliger, M. & Matthews, P.B.C. (1975). The effects of fusimotor stimulation during small amplitude stretching on the frequency response of the primary ending of the mammalian muscle spindle. J. Physiol. 253, 175–206.Google Scholar
- Hulliger, M., Matthews, P.B.C. & Noth, J. (1977). Static and dynamic fusimotor action on the response of Ia fibres to low frequency sinusoidal stretching of widely ranging amplitude. J. Physiol. 267, 811–838.Google Scholar
- Maclaine, C.G., McWilliam, P.N., Murray-Smith, D.J. & Rosenberg, J.R. (1977). A possible mode of action of static fusimotor axons as revealed by system identification techniques. Brain Res. 135, 351–357.Google Scholar
- Prochazka, A., Stephens, J.A. & Wand, P. (1979). Muscle spindle discharge in normal and obstructed movements. J. Physiol. 287, 57–66.Google Scholar
- Rosenberg, J.R., Murray-Smith, D.J. & Rigas, A. (1982). An introduction to the application of system identification techniques to elements of the neuromuscular system. Trans. Inst. M.C. 4, 187–201.Google Scholar