Ara es mostren els items 1-20 de 30

  • Acute sleep deprivation induces a local brain transfer information increase in the frontal cortex in a widespread decrease context 

    Alonso López, Joan Francesc; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Alcalá Álvarez, Marta; Antonijoan, Rosa Maria; Giménez Badia, Sandra (2016-04-01)
    Article
    Accés obert
    Sleep deprivation (SD) has adverse effects on mental and physical health, affecting the cognitive abilities and emotional states. Specifically, cognitive functions and alertness are known to decrease after SD. The aim of ...
  • Aplicación de la entropía condicional para el análisis del EEG bajo terapia farmacológica 

    Alonso López, Joan Francesc; Martínez Vera, Naira Pilar; Mañanas Villanueva, Miguel Ángel; Romero Lafuente, Sergio; Barbanoj, Manel J. (CEA, 2009)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    El análisis del electroencefalograma humano constituye una herramienta muy útil para la evaluación de la biodisponibilidad de un fármaco en el cerebro. Se ha aplicado el calculo de entropía condicional a señales ...
  • Assessment of the pharmacological effects of alprazolam on electroencephalography using connectivity indexes not affected by volume conduction 

    Alonso López, Joan Francesc; Sabater Camps, Aitana; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Riba Serrano, Jordi (2015)
    Comunicació de congrés
    Accés obert
    Electroencephalographic analysis techniques have become a very useful tool to assess brain activity and interactions between cerebral regions, that is, the so-called cerebral connectivity analysis. The effects of some drugs ...
  • Auditory P3a and P3b neural generators in schizophrenia: An adaptive sLORETA P300 localization approach 

    Bachiller, Alejandro; Romero Lafuente, Sergio; Molina, Vicente; Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Poza Crespo, Jesús; Hornero Sánchez, Roberto (2015-12)
    Article
    Accés obert
    The present study investigates the neural substrates underlying cognitive processing in schizophrenia (Sz) patients. To this end, an auditory 3-stimulus oddball paradigm was used to identify P3a and P3b components, elicited ...
  • Automatic BSS-based filtering of metallic interference in MEG recordings: definition and validation using simulated signals 

    Migliorelli Falcone, Carolina Mercedes; Alonso López, Joan Francesc; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Nowak, Rafal; Russi Tintoré, Antonio (2015-05-27)
    Article
    Accés obert
    Objective. One of the principal drawbacks of magnetoencephalography (MEG) is its high sensitivity to metallic artifacts, which come from implanted intracranial electrodes and dental ferromagnetic prosthesis and produce a ...
  • Avaliação do efeito da referencia em estudos farmacológicos mediante EEG 

    Fernández Márquez, Ana; Alonso López, Joan Francesc (2015)
    Comunicació de congrés
    Accés obert
    Um dos problemas que apresenta o registro de electroencefalogramas (EEG) está relacionado com a referência usada durante a aquisição dos dados. O presente artigo analisa o comportamento de três referências, o promédio ...
  • Cross-conditional entropy and coherence analysis of pharmaco-EEG changes induced by alprazolam 

    Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Romero Lafuente, Sergio; Rojas Martínez, Mónica; Riba Serrano, Jordi (2012-03)
    Article
    Accés restringit per política de l'editorial
    Rationale Quantitative analysis of electroencephalographic signals (EEG) and their interpretation constitute a helpful tool in the assessment of the bioavailability of psychoactive drugs in the brain. Furthermore, ...
  • Disseny i implementació de laboratoris virtuals per a l'ensenyament de l'enginyeria 

    Alonso López, Joan Francesc (2007)
    Pòster (projecte CCD)
    Accés obert
  • Drug effect on EEG connectivity assessed by linear and nonlinear couplings 

    Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Romero Lafuente, Sergio; Hoyer, Dirk; Riba Ruiz, Jordi-Roger; Barbanoj, Manel J. (2010-03)
    Article
    Accés restringit per política de l'editorial
    Quantitative analysis of human electroencephalogram (EEG) is a valuable method for evaluating psychopharmacological agents. Although the effects of different drug classes on EEG spectra are already known, interactions ...
  • Estudi de la connectivitat cerebral durant la vigília prolongada 

    Marta, Alcalá; Alonso López, Joan Francesc; Giménez, Sandra; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel (EUETIB, 2014-12-01)
    Text en actes de congrés
    Accés obert
    En aquest estudi s’avaluen els efectes de la privació de son sobre el senyals electroencefalogràfics de voluntaris sans mitjançant la transferència d’entropia (TE), una tècnica no paramètrica que permet detectar dependències ...
  • Estudio de la actividad cortical espontánea en ratones transgénicos con Alzheimer 

    Montañà ortiz, Ernest; Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Sánchez Vives, Maria Victoria (2015)
    Comunicació de congrés
    Accés obert
    Las señales corticales del cerebro permiten una visión más clara de la actividad neuronal que el estudio clásico de las señales registradas en el cuero cabelludo y son de gran interés en el estudio de enfermedades ...
  • Estudio de la conectividad cerebral mediante transferencia de entropía 

    Alcalá Álvarez, Marta; Alonso López, Joan Francesc; Giménez Badia, Sandra; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel (2014)
    Comunicació de congrés
    Accés obert
    En el presente trabajo se estudian los efectos de la privación del sueño sobre las señales electroencefalográficas de voluntarios sanos mediante la transferencia de entropía (TE), una técnica no paramétrica que permite ...
  • Evaluation of multiple comparison correction procedures in drug assessment studies using LORETA maps 

    Alonso López, Joan Francesc; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Rojas Martínez, Mónica; Riba Serrano, Jordi; Barbanoj, Manuel José (2015-10-01)
    Article
    Accés obert
    The identification of the brain regions involved in the neuropharmacological action is a potential procedure for drug development. These regions are commonly determined by the voxels showing significant statistical differences ...
  • Evaluation of Respiratory Muscles Activity by means of Cross Mutual Information Function at Different Levels of Ventilatory Effort 

    Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Hoyer, Dirk; Bruce, Eugene N.; Zbigniew L., Topor (Institute of Electrical and Electronics Engineers, 2007-09)
    Article
    Accés obert
    Analysis of respiratory muscles activity is an effective technique for the study of pulmonary diseases such as obstructive sleep apnea syndrome (OSAS). Respiratory diseases, especially those associated with changes in the ...
  • High-density surface EMG maps from upper-arm and forearm muscles 

    Rojas Martínez, Mónica; Mañanas Villanueva, Miguel Ángel; Alonso López, Joan Francesc (2012-12)
    Article
    Accés obert
    Background sEMG signal has been widely used in different applications in kinesiology and rehabilitation as well as in the control of human-machine interfaces. In general, the signals are recorded with bipolar electrodes ...
  • Identification of isometric contractions based on High Density EMG maps 

    Rojas Martínez, Mónica; Mañanas Villanueva, Miguel Ángel; Alonso López, Joan Francesc; Merletti, R. (2012-07)
    Article
    Accés restringit per política de l'editorial
    Identification of motion intention and muscle activation strategy is necessary to control human–machine interfaces like prostheses or orthoses, as well as other rehabilitation devices, games and computer-based training ...
  • Influence of metallic artifact filtering on MEG signals for source localization during interictal epileptiform activity 

    Migliorelli Falcone, Carolina Mercedes; Alonso López, Joan Francesc; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Nowak, Rafal; Russi Tintoré, Antonio (2016-03-02)
    Article
    Accés obert
    Objective. Medical intractable epilepsy is a common condition that affects 40% of epileptic patients that generally have to undergo resective surgery. Magnetoencephalography (MEG) has been increasingly used to identify the ...
  • Inhibition of alpha oscillations through serotonin-2A receptor activation underlies the visual effects of ayahuasca in humans 

    Valle, Marta; Ana Elda, Maqueda; Rabella, Mireia; Rodríguez Pujadas, Aina; Antonijoan Arbós, Rosa Maria; Romero Lafuente, Sergio; Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Barker, Steven; Friedlander, Pablo; Feilding, Amanda; Riba, Jordi (2016-07)
    Article
    Accés restringit per política de l'editorial
    Ayahuasca is an Amazonian psychotropic plant tea typically obtained from two plants, Banisteriopsis caapi and Psychotria viridis. It contains the psychedelic 5-HT2A and sigma-1 agonist N,N-dimethyltryptamine (DMT) plus ...
  • Innovative treatment modalities for urinary incontinence: a European survey identifying experience and attitude of healthcare providers 

    Kastelein, Arnoud W.; Dicker, Maarten F. A.; Opmeer, Brent C.; Angles, Sonia S.; Raatikainen, Kaisa E.; Alonso López, Joan Francesc; Taut, Diana; Airaksinen, Olavi; Cardozo, Linda L.; Roovers, Jan-Paul W. (2017-04-21)
    Article
    Accés obert
    Introduction and hypothesis Urinary incontinence is a common condition in women, with a reported prevalence ranging from 25% to 51%. Of these women, an estimated 38% suffer from stress urinary incontinence (SUI). A European ...
  • Interacción en sistemas biológicos mediante nuevos índices basados en la dinámica no lineal 

    Alonso López, Joan Francesc (Universitat Politècnica de Catalunya, 2011-09-29)
    Tesi
    Accés obert
    Most biological systems are complex and consist of several interconnected parts whose links can contain additional information which can be hidden from the observer. As a result of the interactions between elements, emergent ...