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Modulation by context of a scene in monkey anterior inferotemporal cortex during a saccadic eye movement task Anais da ABC (AABC)
LIMA,BRUSS; FIORANI,MARIO; GATTASS,RICARDO.
We investigated the effect of a scene on the activity of cells in the anterior inferotemporal (AIT) cortex while the monkey performed a saccadic eye movement (SEM) task with and without the context of a scene (gray frame). Most neurons did not code for the presence of a scene when it appeared alone (monkey free viewing) or when the monkey was fixating. Nevertheless, when a peripheral target was turned on and the monkey had to make a SEM to it, some cells were capable of differentially coding the presence of the scene before and after the saccade.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inferotemporal cortex; Spatial coding; Object coding; Cebus monkey; Perirhinal cortex.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000100008
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Correlations of recognition memory performance with expression and methylation of brain-derived neurotrophic factor in rats Biol. Res.
Muñoz,Pablo C; Aspé,Mauricio A; Contreras,Luis S; Palacios,Adrián G.
Object recognition memory allows discrimination between novel and familiar objects. This kind of memory consists of two components: recollection, which depends on the hippocampus, and familiarity, which depends on the perirhinal cortex (Pcx). The importance of brain-derived neurotrophic factor (BDNF) for recognition memory has already been recognized. Recent evidence suggests that DNA methylation regulates the expression of BDNF and memory. Behavioral and molecular approaches were used to understand the potential contribution of DNA methylation to recognition memory. To that end, rats were tested for their ability to distinguish novel from familiar objects by using a spontaneous object recognition task. Furthermore, the level of DNA methylation was...
Tipo: Journal article Palavras-chave: DNA methylation; Recognition memory; Synaptic plasticity; Hippocampal; Perirhinal cortex; BDNF.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000200013
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Changes of ongoing activity in Cebus monkey perirhinal cortex correlate with behavioral performance BJMBR
Lima,B.; Fiorani,M.; Gattass,R..
A Cebus apella monkey weighing 4 kg was trained in a saccadic eye movement task and while the animal performed the task we recorded the extracellular activity of perirhinal cortical neurons. Although the task was very simple and maintained at a constant level of difficulty, we observed considerable changes in the performance of the monkey within each experimental session. The behavioral states responsible for such variation may be related to arousal, motivation or attention of the animal while engaged in the task. In approximately 20% (16/82) of the units recorded, long-term direct or inverse correlations could be demonstrated between the monkey's behavioral state and the cells' ongoing activity (independent of the visual stimulation or of the specific...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Perirhinal cortex; Behavioral states; Motivation; Cebus monkeys.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000100010
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