Brain Asymmetry
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Cerebral localization of higher functions: The period between Thomas Willis and Paul Broca
RESUMO. Os debates milenares sobre a localização da mente (funções superiores) chegaram a um novo caminho quando Willis localizou uma função nervosa superior (memória) no parênquima cerebral, e supostamente, no córtex cerebral. Cerca de dois séculos depois, Broca, baseado em sólido pensamento científico, localizou uma área circunscrita da 3ª ci
Dement. neuropsychol.. Publicado em: 18/06/2019
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2. Theoretical, behavioral and neuroimage evidence on discourse processing aging
A growing interest in cognition in aging has been observed because of both the epidemiologic factor of an increase in the lifespan of the world's population and the cognitive changes behaviorally and biologically detectable in this population. The most complex of language components and fundamental in social interaction, discourse production and comprehensio
Psychology & Neuroscience. Publicado em: 2009-12
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3. Models of brain asymmetry in emotional processing
Two models of brain asymmetry in emotional processing were reviewed: the right hemisphere and the valence hypotheses. The first states a dominant role for the right hemisphere in emotional processing, whereas the second assumes that the left hemisphere is dominant for positive emotions and the right hemisphere for negative ones. Different methods, such as th
Psychology & Neuroscience. Publicado em: 2008-06
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4. Analise de assimetria dos ventriculos laterais do cerebro humano em imagens de ressonancia magnetica / Analysis of asymmetry of the lateral ventricles of the human brain in resonance magnetic images
Equipamentos de Ressonância Magnética (RM) permitem a obtenção de seqüências de imagens digitais contendo estruturas tri-dimensionais (3D) do corpo humano. A visualização e a análise computadorizada dessas estruturas têm revolucionado a pratica médica de diversas formas. O enfoque deste trabalho é a análise dos ventrículos laterais do cérebro
Publicado em: 2008
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5. Perception of facial expressions and brain lateralization. / "Percepção de expressões faciais da emoção e lateralização cerebral".
Tem sido freqüentemente discutido na literatura científica o papel que desempenha cada hemisfério cerebral no processamento da informação emocional. O estudo realizado teve por objetivo investigar o padrão de dominância hemisférica para a percepção das expressões faciais de alegria, tristeza, raiva e medo. Em dois experimentos realizados foi utili
Publicado em: 2004
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6. Heritability of lobar brain volumes in twins supports genetic models of cerebral laterality and handedness
Although the left and right human cerebral hemispheres differ both functionally and anatomically, little is known about the environmental or genetic factors that govern central nervous system asymmetry. Nevertheless, cerebral asymmetry is strongly correlated with handedness, and handedness does have a significant genetic component. To explore the relative co
The National Academy of Sciences.
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7. Direction of handedness linked to hereditary asymmetry of a sensory system.
Studies on the role of heredity in the transmission of handedness in nonhuman mammals have, so far, led to the isolation of mouse strains that differed in the lateralized versus ambidextrous use of the forepaw in a food-retrieval task (strength of paw preference). Here we report that left versus right use of the forepaw (direction of paw preference) is assoc
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8. Functional activation in motor cortex reflects the direction and the degree of handedness
Handedness is the clearest example of behavioral lateralization in humans. It is not known whether the obvious asymmetry manifested by hand preference is associated with similar asymmetry in brain activation during movement. We examined the functional activation in cortical motor areas during movement of the dominant and nondominant hand in groups of right-h
The National Academy of Sciences of the USA.
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9. Task-related and item-related brain processes of memory retrieval
In all cognitive tasks, general task-related processes operate throughout a given task on all items, whereas specific item-related processes operate differentially on individual items. In typical functional neuroimaging experiments, these two sets of processes have usually been confounded. Herein we report a combined positron emission tomography and eve
The National Academy of Sciences.
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10. A transcriptional regulatory cascade that controls left/right asymmetry in chemosensory neurons of C. elegans
The molecular mechanisms of differential pattern formation along the left/right (L/R) axis in the nervous system are poorly understood. The nervous system of the nematode Caenorhabditis elegans displays several examples of L/R asymmetry, including the directional asymmetry displayed by the two ASE taste receptor neurons, ASE left (ASEL) and ASE right (AS
Cold Spring Harbor Laboratory Press.
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11. Left hemisphere dominance for processing vocalizations in adult, but not infant, rhesus monkeys: field experiments.
In humans, the left hemisphere of the brain is dominant for processing language. To assess the evolutionary origins of this neuropsychological mechanism, playback experiments were conducted on a large population of free-ranging rhesus monkeys (Macaca mulatta). Playbacks provided an equal opportunity to orient the right or left ear toward the speaker. Results
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12. What happens in the leucotomised brain? A postmortem morphological study of brains from schizophrenic patients.
Volume measurements were carried out on 19 brains from leucotomised schizophrenic patients and 20 age- and sex-matched controls using a stereological method. The volume of the total fixed brain, hemispheres, cortex, white matter, and central grey matter were all significantly reduced compared with controls. White matter and central grey structures were signi