Now showing items 1-11 of 11

    • Canonical maximization of coherence: a novel tool for investigation of neuronal interactions between two datasets 

      Vidaurre, Carmen Upna; Nolte, Guido; Vries, I. E. J. de; Gómez Fernández, Marisol Upna; Boonstra, Tjeerd W.; Müller, Klaus Robert; Villringer, Arno; Nikulin, Vadim V. (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Synchronization between oscillatory signals is considered to be one of the main mechanisms through which neuronal populations interact with each other. It is conventionally studied with mass-bivariate measures utilizing ...
    • Computation of greatest common divisor for the blind deconvolution of transient impulsive signals 

      Lecumberri Villamediana, Pablo Upna; Gómez Fernández, Marisol Upna; Carlosena García, Alfonso Upna (Universitat Politècnica de Catalunya, 2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We propose a new blind deconvolution method for transient impulsive signals in a single input – multiple output (SIMO) system. The method exploits the data redundancy inherent to SIMO multichannel systems to obtain an ...
    • Design of low-cost smart accelerometers 

      Carlosena García, Alfonso Upna; López Martín, Antonio Upna; Massarotto, Marco Upna; Cruz Blas, Carlos Aristóteles de la Upna; Lecumberri Villamediana, Pablo Upna; Gómez Fernández, Marisol Upna; Pintor Borobia, Jesús María Upna; Gárriz Sanz, Sergio Upna (Universitat Politècnica de Catalunya, 2005)   Artículo / Artikulua  OpenAccess
      The goal of this project is to design a low-cost smart accelerometer, making use of a piezoelectric element as basic sensing material, and adding a mixed-mode conditioning circuit.
    • Enhancing sensorimotor BCI performance with assistive afferent activity: an online evaluation 

      Vidaurre, Carmen Upna; Ramos Murguialday, Ander; Haufe, Stefan; Gómez Fernández, Marisol Upna; Müller, Klaus Robert; Nikulin, Vadim V. (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      An important goal in Brain-Computer Interfacing (BCI) is tofind and enhance procedural strategies for users for whom BCI control is not sufficiently accurate. To address this challenge, we conducted offline analyses and ...
    • An evaluation of the 30-s chair stand test in older adults: frailty detection based on kinematic parameters from a single inertial unit 

      Millor Muruzábal, Nora Upna; Lecumberri Villamediana, Pablo Upna; Gómez Fernández, Marisol Upna; Martínez Ramírez, Alicia Upna; Izquierdo Redín, Mikel Upna (BioMed Central, 2013)   Artículo / Artikulua  OpenAccess
      Background: A growing interest in frailty syndrome exists because it is regarded as a major predictor of co-morbidities and mortality in older populations. Nevertheless, frailty assessment has been controversial, particularly ...
    • Frailty assessment based on the instrumented version on the 30-s chair stand test 

      Millor Muruzábal, Nora Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      El objetivo de esta tesis es mejorar la evaluación de la capacidad funcional usando nuevos parámetros cinemáticos. Así, el personal clínico dispondrá de una serie de medidas objetivas y cuantificables para realizar sus ...
    • Frailty assessment based on trunk kinematic parameters during walking 

      Martínez Ramírez, Alicia Upna; Martinikorena Aranburu, Ion Upna; Gómez Fernández, Marisol Upna; Lecumberri Villamediana, Pablo Upna; Millor Muruzábal, Nora Upna; Rodríguez Mañas, Leocadio; García García, Francisco José; Izquierdo Redín, Mikel Upna (BioMed Central, 2015)   Artículo / Artikulua  OpenAccess
      Background: Physical frailty has become the center of attention of basic, clinical and demographic research due to its incidence level and gravity of adverse outcomes with age. Frailty syndrome is estimated to affect 20 % ...
    • Multichannel blind deconvolution of impulsive signals 

      Lecumberri Villamediana, Pablo Upna; Gómez Fernández, Marisol Upna; Carlosena García, Alfonso Upna (2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this communication, the problem of blind deconvolution of transient, impulsive signals in a multichannel environment is addressed. This kind of signals arise naturally, or are used as external excitation, in many ...
    • Relevance of sex, age and gait kinematics when predicting fall-risk and mortality in older adults 

      Porta Cuéllar, Sonia Upna; Martínez Ramírez, Alicia Upna; Millor Muruzábal, Nora Upna; Gómez Fernández, Marisol Upna; Izquierdo Redín, Mikel Upna (Elsevier, 2020)   Artículo / Artikulua
      Approximately one-third of elderly people fall each year with severe consequences, including death. The aim of this study was to identify the most relevant features to be considered to maximize the accuracy of a logistic ...
    • Sources of linear and non-linear synchrony between brain and muscles: linear and non-linear CMC sources 

      Vidaurre, Carmen Upna; Gómez Fernández, Marisol Upna; Nolte, Guido; Villringer, Arno; Carlowitz Ghori, Katherina von; Nikulin, Vadim V. (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This manuscript shows that it is possible to find distinct sources of brain activity, at similar frequencies, arising from linear and non-linear interactions of the brain with the muscular system. Those sources were obtained ...
    • Valoración de la capacidad funcional en el ámbito domiciliario y en la clínica. Nuevas posibilidades de aplicación de la acelerometría para la valoración de la marcha, equilibrio y potencia muscular en personas mayores 

      Izquierdo Redín, Mikel Upna; Martínez Ramírez, Alicia Upna; Larrión, J. L.; Irujo Espinosa, M.; Gómez Fernández, Marisol Upna (Gobierno de Navarra, 2008)   Artículo / Artikulua  OpenAccess
      Dentro de cualquier población de individuos mayores de 65 años, una proporción sustancial (entre el 6% y el 25%) sufre diferentes síntomas del síndrome de fragilidad. A pesar de la complejidad del termino fragilidad y de ...