نتایج جستجو برای: transcranial doppler ultrasonography

تعداد نتایج: 92398  

Journal: :Chronic obstructive pulmonary diseases 2014
Brett E Fenster John D Carroll

Abbreviations: patent foramen ovale, PFO; transcranial Doppler ultrasonography, TCD; Global initiative for chronic Obstructive Lung Disease, GOLD; partial pressure of oxygen, PaO2; oxygen uptake, V’O2; high-intensity transient signals, HITS Funding Support: Not Applicable. Citation: Fenster BE, Carroll JD. Patent foramen ovale in COPD and hypoxia: Innocent bystander or novel therapeutic target?...

2013
Felix Duecker Tom A. de Graaf Christianne Jacobs Alexander T. Sack

Transcranial magnetic stimulation (TMS) is widely used in experimental brain research to manipulate brain activity in humans. Next to the intended neural effects, every TMS pulse produces a distinct clicking sound and sensation on the head which can also influence task performance. This necessitates careful consideration of control conditions in order to ensure that behavioral effects of intere...

2016
Gianluca Campana Rebecca Camilleri Beatrice Moret Filippo Ghin Andrea Pavan

Transcranial random noise stimulation (tRNS) is a recent neuro-modulation technique whose effects at both behavioural and neural level are still debated. Here we employed the well-known phenomenon of motion after-effect (MAE) in order to investigate the effects of high- vs. low-frequency tRNS on motion adaptation and recovery. Participants were asked to estimate the MAE duration following prolo...

2015
Jennifer M. Thomson Deniz Doruk Bryan Mascio Felipe Fregni Carlo Cerruti

Transcranial direct current stimulation (tDCS) is a neuromodulatory technique that offers promise as an investigative method for understanding complex cognitive operations such as reading. This study explores the ability of a single session of tDCS to modulate reading efficiency and phonological processing performance within a group of healthy adults. Half the group received anodal or cathodal ...

2013
Felix Duecker Alexander T. Sack

Transcranial magnetic stimulation (TMS) allows non-invasive manipulation of brain activity during active task performance. Because every TMS pulse is accompanied by non-neural effects such as a clicking sound and somato-sensation on the head, control conditions are required to ensure that changes in task behavior are indeed due to the induced neural effects. However, the non-neural effects of T...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 1999
A Pascual-Leone D Bartres-Faz J P Keenan

Transcranial magnetic stimulation (TMS) provides a non-invasive method of induction of a focal current in the brain and transient modulation of the function of the targeted cortex. Despite limited understanding about focality and mechanisms of action, TMS provides a unique opportunity of studying brain-behaviour relations in normal humans. TMS can enhance the results of other neuroimaging techn...

2012
Giacomo Koch Marco Bozzali Sonia Bonnì Viola Giacobbe Carlo Caltagirone Mara Cercignani

Recording of slow spontaneous fluctuations at rest using functional magnetic resonance imaging (fMRI) allows distinct long-range cortical networks to be identified. The neuronal basis of connectivity as assessed by resting-state fMRI still needs to be fully clarified, considering that these signals are an indirect measure of neuronal activity, reflecting slow local variations in de-oxyhaemoglob...

2013
Andisheh Bastani Shapour Jaberzadeh

BACKGROUND Novel non-invasive brain stimulation techniques such as transcranial direct current stimulation (tDCS) have been developed in recent years. TDCS-induced corticospinal excitability changes depend on two important factors current intensity and stimulation duration. Despite clinical success with existing tDCS parameters, optimal protocols are still not entirely set. OBJECTIVE/HYPOTHES...

2015
Laura Y. Cabrera Peter B. Reiner

In order to gain insight into the public's perspective on using the minimally invasive technique transcranial direct current stimulation (tDCS) as an enhancement tool, we analyzed and compared online comments in key popular press articles from two different periods (pre-commercialization and post-commercialization). The main conclusion drawn from this exploratory investigation is that public pe...

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