Listar Neurociencia e Control Motor (NEUROcom) por autor "Mariño Alfonso, Xurxo"
Mostrando ítems 1-20 de 25
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A Computational Model of Cuneothalamic Projection Neurons
Sánchez Vila, Eduardo; Barro Ameneiro, Senén; Mariño Alfonso, Xurxo; Canedo Lamas, Antonio (Taylor and Francis, 2003)[Abstract] The dorsal column nuclei, cuneatus and gracilis, play a fundamental role in the processing and integration of somesthetic ascending information. Intracellular and patch-clamp recordings obtained in cat in vivo ... -
A realistic computational model of the local circuitry of the cuneate nucleus
Sánchez Vila, Eduardo; Barro Ameneiro, Senén; Mariño Alfonso, Xurxo; Canedo Lamas, Antonio (Springer, 2001)Intracellular recordings obtained under cutaneous and lemniscal stimulation show that the afferent fibers can establish excitatory and inhibitory synaptic connections with cuneothalamic neurons [5]. In addition, distinct ... -
Bootstrap testing for cross-correlation under low firing activity
González Montoro, Aldana María; Cao, Ricardo; Espinosa, Nelson; Cudeiro, Javier; Mariño Alfonso, Xurxo (Springer, 2015-04-14)[Abstract] A new cross-correlation synchrony index for neural activity is proposed. The index is based on the integration of the kernel estimation of the cross-correlation function. It is used to test for the dynamic ... -
Changes in Visual Responses in the Feline dLGN: Selective Thalamic Suppression Induced by Transcranial Magnetic Stimulation of V1
Labra, Carmen de; Rivadulla, Casto; Grieve, Kenneth; Mariño Alfonso, Xurxo; Espinosa, Nelson; Cudeiro, Javier (Oxford University Press, 2006-08-14)[Abstract] Transcranial magnetic stimulation (TMS) of the cortex can modify activity noninvasively and produce either excitatory or inhibitory effects, depending on stimulus parameters. Here we demonstrate controlled ... -
Combinación de nuevas técnicas electrofisiológicas y de imagen en el estudio de la función de la corteza visual primaria
Mariño Alfonso, Xurxo; Schummers, James; Sur, Mriganka (J. V. Sácnhez Andrés, 2003)This work summarizes current research focused on explaining orientation selectivity of primary visual cortex (V1), and describes the electrophysiological and imaging techniques than are being used. Development. The study ... -
La corteza cerebral modula la transmisión cutánea a través de los núcleos de los cordones posteriores
Mariño Alfonso, Xurxo; Aguilar Fernández, Jaime; Soto, C.; Canedo Lamas, Antonio (J.V. Sánchez Andrés, 2001)The mechanisms used by the cerebral cortex to modulate the cutaneous information at prethalamic level have been scarcely studied. This article reviews experimental evidence leading to a better understanding of this issue ... -
Cortical modulation of dorsal column nuclei: a computational study
Sánchez Vila, Eduardo; Barro Ameneiro, Senén; Mariño Alfonso, Xurxo; Canedo Lamas, Antonio (Springer, 2006-04-22)[Abstract] We present a computational study aimed at exploring the sensorimotor cortex modulation of the behaviour of dorsal column nuclei, specifically the impact of synaptic parameters, during both sleep and waking ... -
Cortical Modulation of the Transient Visual Response at Thalamic Level: A TMS Study
Espinosa, Nelson; Mariño Alfonso, Xurxo; Labra, Carmen de; Cudeiro, Javier (PLoS ONE, 2011-02-10)[Abstract] The transient visual response of feline dorsal lateral geniculate nucleus (dLGN) cells was studied under control conditions and during the application of repetitive transcranial magnetic stimulation at 1 Hz ... -
Cortico-subcortical synchronization in the chloralose-anesthetized cat
Mariño Alfonso, Xurxo; Aguilar Fernández, Jaime; Canedo Lamas, Antonio (Elsevier, 1999-07)[Abstract] The spontaneous and paroxysmal cerebral cortical synchronized activity was used as reference to study the cortical impact exerted on subcortical neurons. The sensorimotor cortical synchronized activity spread ... -
Coupled slow and delta oscillations between cuneothalamic and thalamocortical neurons in the chloralose anesthetized cat
Mariño Alfonso, Xurxo; Martínez Otero, Luis Miguel; Canedo Lamas, Antonio (Elsevier, 1996)Simultaneous recordings were obtained from cuneothalamic (extracellular) and thalamocortical (intracellular) cells in chloralose anesthetized cats. It was found that cuneothalamic neurons present slow rhythmicity (0.1–1 ... -
Coupled slow and delta oscillations between cuneothalamic and thalamocortical neurons in the chloralose anesthetized cat
Mariño Alfonso, Xurxo; Martínez, Luis; Canedo Lamas, Antonio (Elsevier, 1996)[Abstract] Simultaneous recordings were obtained from cuneothalamic (extracellular) and thalamocortical (intracellular) cells in chloralose anesthetized cats. It was found that cuneothalamic neurons present slow rhythmicity ... -
Cross nearest-spike interval based method to measure synchrony dynamics
González Montoro, Aldana María; Cao, Ricardo; Faes, Christel; Molenberghs, Geert; Espinosa, Nelson; Cudeiro, Javier; Mariño Alfonso, Xurxo (American Institute of Mathematical Sciences, 2014-02)[Abstract] A new synchrony index for neural activity is de ned in this paper. The method is able to measure synchrony dynamics in low ring rate scenarios. It is based on the computation of the time intervals between ... -
Effects on EEG of low (1Hz) and high (15Hz) frequency repetitive transcranial magnetic stimulation of the visual cortex: a study in the anesthetized cat
Espinosa, Nelson; Labra, Carmen de; Rivadulla, Casto; Mariño Alfonso, Xurxo; Grieve, Kenneth; Cudeiro, Javier (Bentham Open, 2007-12-07)[Abstract] Here we confirm our earlier findings that showed 1Hz rTMS over the primary visual cortex of the anesthetized cat, known to cause inhibition of the cortex, induces an increase in power in the slow, delta band of ... -
Functional two-way analysis of variance and bootstrap methods for neural synchrony analysis
González Montoro, Aldana María; Cao, Ricardo; Espinosa, Nelson; Cudeiro, Javier; Mariño Alfonso, Xurxo (BioMed Central, 2014-08-12)[Abstract] Background: Pairwise association between neurons is a key feature in understanding neural coding. Statistical neuroscience provides tools to estimate and assess these associations. In the mammalian brain, ... -
Invariant computations in local cortical networks with balanced excitation and inhibition
Mariño Alfonso, Xurxo; Schummers, James; Lyon, David C.; Schwabe, Lars; Beck, Oliver; Wiesing, Peter; Obermayer, Klaus; Sur, Mriganka (Nature, 2005-06-23)[Abstract] Cortical computations critically involve local neuronal circuits. The computations are often invariant across a cortical area yet are carried out by networks that can vary widely within an area according to its ... -
Lemniscal recurrent and transcortical influences on cuneate neurons
Canedo Lamas, Antonio; Mariño Alfonso, Xurxo; Aguilar Fernández, Jaime (Elsevier, 2000)[Abstract] Intracellular recordings were obtained from cuneate neurons of chloralose-anesthetized, paralysed cats to study the synaptic responses induced by electrical stimulation of the contralateral medial lemniscus. ... -
Local networks in visual cortex and their influence on neuronal responses and dynamics
Schummers, James; Mariño Alfonso, Xurxo; Sur, Mriganka (Elsevier, 2005-11-07)[Abstract] Networks of neurons in the cerebral cortex generate complex outputs that are not simply predicted by their inputs. These emergent responses underlie the function of the cortex. Understanding how cortical networks ... -
Modelling the circuitry of the cuneate nucleus
Sánchez Vila, Eduardo; Barro Ameneiro, Senén; Mariño Alfonso, Xurxo; Canedo Lamas, Antonio; Vázquez Muñíz, Pablo José (Springer, 1999)Experimental data recorded in cat "in vivo" offer a new picture of the cuneate nucleus. Clasically definied as a simple relay station, the cuneate nucleus is currently seen as a fundamental stage in somatosensory information ... -
Nitric oxide-mediated cortical activation: a diffuse wake-up system
Mariño Alfonso, Xurxo; Cudeiro, Javier (Society of Neuroscience, 2003)Nitric oxide (NO) has been implicated in some of the central pathways engaged in the regulation of the sleep–wake cycle. The existence of nitric oxide synthase (NOS) in the cholinergic basal forebrain (BF) cells projecting ... -
Sensorimotor cortical influences on cuneate nucleus rhythmic activity in the anesthetized cat
Mariño Alfonso, Xurxo; Canedo Lamas, Antonio; Aguilar Fernández, Jaime (Elsevier, 1999)[Abstract] This work aimed to study whether the sensorimotor cerebral cortex spreads down its rhythmic patterns of activity to the dorsal column nuclei. Extracellular and intracellular recordings were obtained from the ...