Contextual Cue
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Efeitos de pistas contextuais em língua de sinais sobre recordação livre e compreensão de texto narrativo / Efeitos de pistas contextuais em língua de sinais sobre recordação livre e compreensão de texto narrativo
Este estudo investigou os efeitos de exposição do leitor surdo à pista contextual em língua de sinas (início, meio e final de texto narrativo) sobre a compreensão de questões de inferência. Participaram 40 surdos, com faixa etária entre 11 e 35 anos, fluentes em Libras e com conhecimento básico da escrita em Língua Portuguesa, divididos em 4 grupo
Publicado em: 2009
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2. Selectively enhanced contextual fear conditioning in mice lacking the transcriptional regulator CCAAT/enhancer binding protein δ
CCAAT/enhancer binding protein δ (C/EBPδ) is a transcriptional regulator implicated in the hepatic acute phase response and in adipogenic and myeloid cell differentiation. We found that C/EBPδ is widely expressed in the peripheral and central nervous systems, including neurons of the hippocampal formation, indicating a role in neural functions. To examine
The National Academy of Sciences.
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3. A Necessity for MAP Kinase Activation in Mammalian Spatial Learning
Although the biochemical mechanisms underlying learning and memory have not yet been fully elucidated, mounting evidence suggests that activation of protein kinases and phosphorylation of their downstream effectors plays a major role. Recent findings in our laboratory have shown a requirement for the mitogen-activated protein kinase (MAPK) cascade in hippoca
Cold Spring Harbor Laboratory Press.
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4. Seeing the light: Illumination as a contextual cue to color choice behavior in bumblebees
The principal challenge faced by any color vision system is to contend with the inherent ambiguity of stimulus information, which represents the interaction between multiple attributes of the world (e.g., object reflectance and illumination). How natural systems deal with this problem is not known, although traditional hypotheses are predicated on the idea t
National Academy of Sciences.
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5. Intrinsic Neuronal Excitability Is Reversibly Altered by a Single Experience in Fear Conditioning
Learning is known to cause alterations in intrinsic cellular excitability but, to date, these changes have been seen only after multiple training trials. A powerful learning task that can be quickly acquired and extinguished with a single trial is fear conditioning. Rats were trained and extinguished on a hippocampus-dependent form of fear conditioning to de
American Physiological Society.
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6. Deficits in Trace Cued Fear Conditioning in Galanin-Treated Rats and Galanin-Overexpressing Transgenic Mice
Galanin inhibits the release of several neurotransmitters and produces performance deficits in a variety of spatial and aversive learning and memory tasks. The experiments in this study investigated the role galanin has in emotional learning and memory using a standard delay cued and contextual fear conditioning task. Rats were administered galanin into the
Cold Spring Harbor Laboratory Press.
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7. Improvements in Hippocampal-Dependent Learning and Decremental Attention in 5-HT3 Receptor Overexpressing Mice
The 5-HT3 receptor for serotonin is expressed within limbic structures and is known to modulate neurotransmitter release, suggesting that this receptor may influence learning and memory. Perturbations in serotonergic neurotransmission lead to changes in the ability to attend, learn, and remember. To examine the role of 5-HT3 receptors in learning, memory, an
Cold Spring Harbor Laboratory Press.
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8. Modulation of retrieval processing reflects accuracy of emotional source memory
There is considerable evidence that encoding and consolidation of memory are modulated by emotion, but the retrieval of emotional memories is not well characterized. Here we manipulated the emotional context with which affectively neutral stimuli were associated during encoding, allowing us to examine neural activity associated with retrieval of emotional me
Cold Spring Harbor Laboratory Press.
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9. α7 Nicotinic Receptor Subunits Are Not Necessary for Hippocampal-Dependent Learning or Sensorimotor Gating: A Behavioral Characterization of Acra7-Deficient Mice
The α7 nicotinic acetylcholine receptor (nAChR) subunit is abundantly expressed in the hippocampus and contributes to hippocampal cholinergic synaptic transmission suggesting that it may contribute to learning and memory. There is also evidence for an association between levels of α7 nAChR and in sensorimotor gating impairments. To examine the role of α7
Cold Spring Harbor Laboratory Press.
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10. Mice Lacking the ERK1 Isoform of MAP Kinase Are Unimpaired in Emotional Learning
The extracellular signal-regulated kinases (ERKs) are members of the mitogen-activated protein kinase (MAPK) superfamily of enzymes and have recently garnered considerable attention in the field of learning and memory. ERK activation has been shown to be required for the induction of long-term potentiation (LTP) in the rat hippocampus and for the formation o
Cold Spring Harbor Laboratory Press.