Person:
Panetsos Petrova, Fivos

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First Name
Fivos
Last Name
Panetsos Petrova
URI
https://hdl.handle.net/20.500.14352/79874
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Biodiversidad, Ecología y Evolución
Area
Matemática Aplicada
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2006 - 20072
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    Wavelet-analysis in application to studying spike separation and information encoding in neuron dynamics
    (Complex Dynamics and Fluctuations in Biomedical Photonics III, 2006) Makarov Slizneva, Valeriy; Pavlov, Alexey N.; Dumsky, Dmitry V.; Tupitsyn, Anatoly N.; Pavlova, Olga N.; Panetsos Petrova, Fivos; Tuchin, W.
    We study how the noise statistics influences the performance of separation of extracellularly recorded spikes by principal component analysis and wavelet-based technique. We show that the two approaches have different robustness against the frequency band of the experimental noise and an appropriate filtering of the spike waveforms can significantly improve the results of separation. For the wavelet technique we suggest filter parameters optimizing spike separation. Finally we discuss a hypothesis that information encoding in neural dynamics may sometimes be considered in terms of frequency modulation.
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    Tactile information processing in the trigeminal complex of the rat
    (Complex Dynamics and Fluctuations in Biomedical Photonics IV, 2007) Makarov Slizneva, Valeriy; Pavlov, Alexey N.; Tupitsyn, Anatoly N.; Panetsos Petrova, Fivos; Moreno, Ángel; García-González,, Víctor; Sánchez Jiménez, Abel; Tuchin, VV
    We study mechanisms of information processing in the principalis (Pr5), oralis (Sp5o) and interpolaris (Sp5i) nuclei of the trigeminal sensory complex of the rat under whisker stimulation by short air puffs. After the standard electrophysiological description of the neural spiking activity we apply a novel wavelet based method quantifying the structural stability of Bring patterns evoked by a periodic whisker stimulation. We show that the response stability depends on the puff duration delivered to the vibrissae and differs among the analyzed nuclei. Pr5 and Sp5i exhibit the maximal stability to an intermediate stimulus duration, whereas Sp5o shows "preference" for short stimuli.