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Titolo:
Fractal features of dark, maintained, and driven neural discharges in the cat visual system
Autore:
Lowen, SB; Ozaki, T; Kaplan, E; Saleh, BEA; Teich, MC;
Indirizzi:
Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 t Elect & Comp Engn, Boston, MA 02215 USA Boston Univ, Dept Biomed Engn, Boston, MA 02215 USA Boston Univ Boston MAUSA 02215 v, Dept Biomed Engn, Boston, MA 02215 USA Rockefeller Univ, New York, NY 10021 USA Rockefeller Univ New York NY USA10021 eller Univ, New York, NY 10021 USA CUNY Mt Sinai Sch Med, Dept Ophthalmol, New York, NY 10029 USA CUNY Mt Sinai Sch Med New York NY USA 10029 almol, New York, NY 10029 USA
Titolo Testata:
METHODS
fascicolo: 4, volume: 24, anno: 2001,
pagine: 377 - 394
SICI:
1046-2023(200108)24:4<377:FFODMA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL GENICULATE-NUCLEUS; RETINAL GANGLION-CELLS; STOCHASTIC POINT-PROCESSES; AUDITORY-NERVE; SPIKE TRAIN; X-CELL; Y-CELL; CHANNELS; SYNCHRONIZATION; CHARACTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Teich, MC Boston Univ, Dept Elect & Comp Engn, 8 St Marys St, Boston, MA 02215 USA Boston Univ 8 St Marys St Boston MA USA 02215 ston, MA 02215 USA
Citazione:
S.B. Lowen et al., "Fractal features of dark, maintained, and driven neural discharges in the cat visual system", METHODS, 24(4), 2001, pp. 377-394

Abstract

We employ a number of statistical measures to characterize neural discharge activity in cat retinal ganglion cells (RGCs) and in their target lateralgeniculate nucleus (LGN) neurons under various stimulus conditions, and wedevelop a new measure to examine correlations in fractal activity between spike-train pairs. In the absence of stimulation (i.e., in the dark), RGC and LGN discharges exhibit similar properties. The presentation of a constant, uniform luminance to the eye reduces the fractal fluctuations in the RGCmaintained discharge but enhances them in the target LGN discharge, so that neural activities in the pair cease to be mirror images of each other. A drifting-grating stimulus yields RGC and LGN driven spike trains similar incharacter to those observed in the maintained discharge, with two notable distinctions: action potentials are reorganized along the time axis so thatthey occur only during certain phases of the stimulus waveform, and fractal activity is suppressed. Under both uniform-luminance and drift! ng-grating stimulus conditions (but not in the dark), the discharges of pairs of LGNcells are highly correlated over long time scales; in contrast discharges of RGCs are nearly uncorrelated with each other. This indicates that action-potential activity at the LGN is subject to a common fractal modulation towhich the RGCs are not subjected. (C) 2001 Academic Press.

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Documento generato il 01/12/20 alle ore 22:46:38