نتایج جستجو برای: dopamine hydrochloride

تعداد نتایج: 82461  

2009
Burkhard Pleger Christian C. Ruff Felix Blankenburg Stefan Klöppel Jon Driver Raymond J. Dolan

UNLABELLED Reward-related dopaminergic influences on learning and overt behaviour are well established, but any influence on sensory decision-making is largely unknown. We used functional magnetic resonance imaging (fMRI) while participants judged electric somatosensory stimuli on one hand or other, before being rewarded for correct performance at trial end via a visual signal, at one of four a...

Journal: :Sao Paulo medical journal = Revista paulista de medicina 2006
Quirino Cordeiro Karen Miguita Elisabete Miracca Hélio Elkis Homero Vallada

Typical antipsychotics have a high affinity for dopamine receptors. It is therefore of interest to investigate such loci in pharmacogenetic studies on psychosis. We investigated the hypothesis that Ser9Gly polymorphism of the DRD3 gene may play a role in the differences in individual response to typical antipsychotics between schizophrenic patients. The sample was composed of 53 good responders...

Journal: :Brain research. Cognitive brain research 2005
Michael X Cohen Jennifer Young Jong-Min Baek Christopher Kessler Charan Ranganath

Psychologists have linked the personality trait extraversion both to differences in reward sensitivity and to dopamine functioning, but little is known about how these differences are reflected in the functioning of the brain's dopaminergic neural reward system. Here, we show that individual differences in extraversion and the presence of the A1 allele on the dopamine D2 receptor gene predict a...

2011
Deanna L. Wallace Jason J. Vytlacil Emi M. Nomura Sasha E. B. Gibbs Mark D'Esposito

We investigated the effect of bromocriptine, a dopamine agonist, on individual differences in behavior as well as frontal-striatal connectivity during a working memory task. After dopaminergic augmentation, frontal-striatal connectivity in low working memory capacity individuals increases, corresponding with behavioral improvement whereas decreases in connectivity in high working memory capacit...

Journal: :Journal of rehabilitation research and development 2009
Nicolaas I Bohnen Martijn L T M Muller Hiroto Kuwabara Rakié Cham Gregory M Constantine Stephanie A Studenski

Older adults have a high prevalence of gait and balance disturbances and falls. Normal aging is associated with significant striatal dopaminergic denervation, which might be a previously unrecognized additional contributor to geriatric falls. This study investigated the relationship between the severity of age-associated striatal dopaminergic denervation (AASDD) and falls in community-dwelling ...

2006
Bruno R. Souza Renan P. Souza Daniela V. F. Rosa Melissa M. Guirnarães Humberto Correa Marco A. Romano-Silva

Changes in dopaminergic function can be regulated by receptor-receptor interaction, or interaction with other proteins with dopamine receptors, and/or elements of the downstream signaling cascades. The complexity of dopaminergic signaling is far from being completely elucidated. It could, however, hold the key to the comprehension of the pathophysiology of neurological and psychiatric disorders...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2006
David J Scott Mary M Heitzeg Robert A Koeppe Christian S Stohler Jon-Kar Zubieta

In addition to its involvement in motor control and in encoding reward value, increasing evidence also implicates basal ganglia dopaminergic mechanisms in responses to stress and aversive stimuli. Basal ganglia dopamine (DA) neurotransmission may then respond to environmental events depending on their saliency, orienting the subsequent responses of the organism to both positive and negative sti...

Journal: :Journal of The Serbian Chemical Society 2022

In this paper, fire resistance of natural fabrics and their composites were experimentally investigated. Special interest was given to use bio based materials such as lignin, chlorophosphates, levulinic acid cardanol in order exploit capability be utilized flame retardants. Dopamine hydrochloride polymerized polydopamine (PDA) coated jute fabric surface. Scanning electron microscope (SEM) therm...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Jean-Claude Dreher Andreas Meyer-Lindenberg Philip Kohn Karen Faith Berman

The dopamine system, which plays a crucial role in reward processing, is particularly vulnerable to aging. Significant losses over a normal lifespan have been reported for dopamine receptors and transporters, but very little is known about the neurofunctional consequences of this age-related dopaminergic decline. In animals, a substantial body of data indicates that dopamine activity in the mid...

Journal: :Journal of neurology, neurosurgery, and psychiatry 1979
S Bassi M G Albizzati L Frattola D Passerini M Trabucchi

Sleep induction has been studied in humans after the administration of apomorphine, a direct stimulant of the central dopaminergic system. The drug induced sleep and vomiting in healthy volunteers while it had no significant effect on 10 Parkinsonism patients treated for a long period with L-dopa. Apomorphine given to a group of Parkinsonism patients not receiving any specific treatment, and wi...

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