Exploració per tema "Neurophysiology"

Ara es mostren els items 1-10 de 10

    • A novel robust index to assess beat-to-beat variability in heart rate time-series analysis 

      García González, Miguel Ángel; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-06-30)
      Article
      Accés obert
      A new index is proposed to estimate the variance of the differentiated heart rate (RR) time series from its truncated histogram. The index is more robust to artifacts than the standard deviation of the differentiated RR ...

    • Analysis of a new tool for electrode positioning on the scalp according to the international 10/20 system 

      Fabregat Sanjuan, Albert; Pàmies Vilà, Rosa; Rigo Vidal, Agnès; Pascual Rubio, Vicenç (Publicaciones DYNA, 2023-07-01)
      Article
      Accés obert
      The emergence of non-invasive electromagnetic brain stimulation techniques, together with the improvement of electrophysiological recordings, has led to the need to increase the precision of the localization of cranial ...

    • Comparison of electrode position marking procedures on the cranial surface 

      Fabregat Sanjuan, Albert; Pàmies Vilà, Rosa; Rigo Vidal, Agnès; Pascual Rubio, Vicenç (2023-08-03)
      Article
      Accés obert
      The study aimed to compare the conventional method of electrode marking with a new system, EPlacement, to improve accuracy and reduce the time burden on health care professionals. Ten health care professionals marked ...

    • Identification of Obstructive Sleep Apnea patients from tracheal breath sound analysis during wakefulness in polysomnographic studies 

      Solà Soler, Jordi; Fiz Fernández, José Antonio; Torres Cebrián, Abel; Jané Campos, Raimon (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Obstructive Sleep Apnea (OSA) is currently diagnosed by a full nocturnal polysomnography (PSG), a very expensive and time-consuming method. In previous studies we were able to distinguish patients with OSA through formant ...

    • Long-term correlations in the surface behavior of dolphins 

      Ferrer Cancho, Ramon; Lusseau, David (2006-05)
      Article
      Accés obert
      Here we study the sequences of surface behavioral patterns of dolphins (Tursiops sp.) and find long-term correlations. We show that the long-term correlations are not of a trivial nature, i.e. they cannot be explained by ...

    • Multisite recording of extracellular potentials produced by microchannel-confined neurons in-vitro 

      Claverol Tinturé, Enrique; Cabestany Moncusí, Joan; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-02-28)
      Article
      Accés obert
      Towards establishing electrical interfaces with patterned in vitro neurons, we have previously described the fabrication of hybrid elastomer-glass devices polymer-on-multielectrode array technology and obtained single-electrode ...

    • Neural offset time evaluation in surface respiratory signals during controlled respiration 

      Estrada Petrocelli, Luis Carlos; Sarlabous, Leonardo; Lozano García, Manuel; Jané Campos, Raimon; Torres Cebrián, Abel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The electrical activity of the diaphragm measured by surface electromyography (sEMGdi) provides indirect information on neural respiratory drive. Moreover, it allows evaluating the ventilatory pattern from the onset and ...

    • Selective detection of dopamine combining multilayers of conducting polymers with gold nanoparticles 

      Fabregat Jové, Georgina; Armelín Diggroc, Elaine Aparecida; Alemán Llansó, Carlos (2014-05-01)
      Article
      Accés restringit per política de l'editorial
      Electrodes based on the combination of three-layered films formed by two different conducting polymers and gold nanoparticles have been developed for the selective voltammetric determination of dopamine in mixtures with ...

    • The effect of respiration-induced heart movements on the ECG 

      Pallàs-Areny, Ramon; Colominas i Balagué, Josep; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1989-06-01)
      Article
      Accés obert
      We present a model describing the rotation of the cardiac vector as a possible mechanism resulting in the presence of respiratory information in the ECG. The way in which this information is revealed is analyzed and the ...

    • Transmural versus non-transmural in situ electrical impedance spectrum for healthy, ischemic, and healed myocardium 

      Salazar, Yolocuauhtli; Bragós Bardia, Ramon; Casas Piedrafita, Óscar; Cinca, Juan; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-08-31)
      Article
      Accés obert
      Electrical properties of myocardial tissue are anisotropic due to the complex structure of the myocardial fiber orientation and the distribution of gap junctions. For this reason, measured myocardial impedance may differ ...