Results 71 to 80 of about 32,095 (238)

Effects of Noninvasive Cervical Vagal Nerve Stimulation on Cognitive Performance But Not Brain Activation in Healthy Adults

open access: yesNeuromodulation: Technology at the Neural Interface, EarlyView., 2020
Abstract Objectives While preliminary evidence suggests that noninvasive vagal nerve stimulation (nVNS) may enhance cognition, to our knowledge, no study has directly assessed the effects of nVNS on brain function and cognitive performance in healthy individuals.
Ruth Klaming   +3 more
wiley   +1 more source

Locus Coeruleus-Norepinephrine System: Spheres of Influence and Contribution to the Development of Neurodegenerative Diseases

open access: yesFrontiers in Bioscience-Landmark
Locus coeruleus is a small bilateral nucleus in the brainstem. It is the main source of norepinephrine (noradrenaline) throughout the central nervous system (about 70% of all norepinephrine in the central nervous system), and, as shown in numerous ...
Vladimir Nikolaevich Nikolenko   +5 more
doaj   +1 more source

Selective Effects of Substantia Nigra and Locus Coeruleus Degeneration on Cognition in Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background The substantia nigra (SN) and locus coeruleus (LC) are among the first brain regions to degenerate in Parkinson's disease (PD). This has important implications for early cognitive deficits because these nuclei are sources of ascending neuromodulators (i.e., dopamine and noradrenaline) that support various cognitive functions such as
Sophie Sun   +6 more
wiley   +1 more source

Brain Metabolite Changes After Anodal Transcranial Direct Current Stimulation in Autism Spectrum Disorder

open access: yesFrontiers in Molecular Neuroscience, 2020
ObjectivesPrevious research has provided evidence that transcranial direct current stimulation (tDCS) can reduce severity of autism spectrum disorder (ASD); however, the exact mechanism of this effect is still unknown. Magnetic resonance spectroscopy has
Narong Auvichayapat   +12 more
doaj   +1 more source

Motor Cortex Disinhibition Correlates with Olfactory Dysfunction in Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background Motor cortex disinhibition, as measured by impaired short‐interval intracortical inhibition (SICI) using transcranial magnetic stimulation (TMS), is a well‐established feature of Parkinson's disease (PD). However, its substantial variability among patients remains unexplained, prompting questions about its origin, clinical relevance,
Claudia Ammann   +12 more
wiley   +1 more source

Comparing the Effect of Microinjection of Angiotensin II and Captopril to the Locus Coeruleus on Morphine Withdrawal Signs in Rat

open access: yesمجله دانشکده پزشکی اصفهان, 2009
Background: Locus coeruleus is one of important involved sites in morphine withdrawal signs, contains high densities of Angiotensin II receptor binding sites.
Zohreh Azizolahi   +3 more
doaj  

Cortical Effects of Dopamine Replacement Account for Clinical Response Variability in Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background Individual variability in clinical response to dopamine replacement therapy (DRT) is a key barrier to efficacious treatment for patients with Parkinson's disease (PD). A better understanding of the neurobiological sources of such interindividual differences is necessary to personalize DRT prescribing, inform future clinical ...
Alex I. Wiesman   +5 more
wiley   +1 more source

Neural mechanisms underlying catastrophic failure in human-machine interaction during aerial navigation [PDF]

open access: yesarXiv, 2016
Objective. We investigated the neural correlates of workload buildup in a fine visuomotor task called the boundary avoidance task (BAT). The BAT has been known to induce naturally occurring failures of human-machine coupling in high performance aircraft that can potentially lead to a crash; these failures are termed pilot induced oscillations (PIOs ...
arxiv  

On the Terracini locus of projective varieties [PDF]

open access: yesarXiv, 2020
We introduce and study properties of the Terracini locus of projective varieties X, which is the locus of finite subsets S of X such that 2S fails to impose independent conditions to a linear system L. Terracini loci are relevant in the study of interpolation problems over double points in special position, but they also enter naturally in the study of
arxiv  

Molecular‐Informed Network Analysis Unveils Fatigue‐Related Functional Connectivity in Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background Fatigue in Parkinson's disease (PD) is a prevalent and debilitating non‐motor symptom. Despite its significant impact on quality of life, the underlying neurochemical and network‐based mechanisms remain poorly understood. Objectives This observational study applied a multimodal imaging approach to explore potential links between the
Ilaria Antonella Di Vico   +14 more
wiley   +1 more source

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