caa a22 4500 465782981 CHVBK 20180323112000.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF02441673 doi (NATIONALLICENCE)springer-10.1007/BF02441673 Power spectra of extracellular potentials generated by an infinite, homogeneous excitable fibre [Elektronische Daten] [G. Dimitrov, Z. Lateva, N. Dimitrova] The power spectra of the extracellular potentials (EPs) generated under activation of an infinite, homogeneous excitable fibre immersed into an infinite, resistive, isotropic and homogeneous volume conductor are theoretically analysed. The changes in the power spectrum related to the changes in the propagation velocity v, amplitudes Vm and duration Tin of the intracellular action potential (IAP) are analytically determined. It is found that in the ultra-low-frequency region the EP spectral power follows the course of alteration in the square of the modified Bessel function of the second kind and order zero multiplied by the fourth power of the frequency, and the Tin can be assessed by the deviation of the EP power spectrum from this function. It is shown why the sensitivity of the spectral characteristics depends substantially on the radial distance y0 from the activated fibre to the point of observation; why the total spectral amplitude depends directly on the IAP wavelength but the total spectral power depends on the IAP wavelength as well as on its duration and propagation velocity; and why the EPs are not proportional to the IAP second spatial derivative even in close proximity to the fibre. IFMBE, 1990 Extracellular potential nationallicence Intracellular action potential duration nationallicence Mathematical model nationallicence Power spectrum nationallicence Propagation velocity nationallicence Radial distance nationallicence Single fibre nationallicence Dimitrov G. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut Lateva Z. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut Dimitrova N. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/1(1990-01-01), 24-30 0140-0118 28:1<24 1990 28 11517 https://doi.org/10.1007/BF02441673 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02441673 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dimitrov G. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Lateva Z. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Dimitrova N. CLBA, Centre of Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev.,str., bl. 105, 1113, Sofia, Bulgaria aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/1(1990-01-01), 24-30 0140-0118 28:1<24 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer