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Registros recuperados: 7
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Horizontal projections of area 17 in Cebus monkeys: metric features, and modular and laminar distribution BJMBR
Amorim,A.K.J.; Picanço-Diniz,C.W..
Metric features and modular and laminar distributions of intrinsic projections of area 17 were studied in Cebus apella. Anterogradely and retrogradely labeled cell appendages were obtained using both saturated pellets and iontophoretic injections of biocytin into the operculum. Laminar and modular distributions of the labeled processes were analyzed using Nissl counterstaining, and/or cytochrome oxidase and/or NADPH-diaphorase histochemistry. We distinguished three labeled cell types: pyramidal, star pyramidal and stellate cells located in supragranular cortical layers (principally in layers IIIa, IIIb <!-- $MVD$:face("Symbol") --><FONT FACE="Symbol">a</font>, IIIb ß and IIIc). Three distinct axon terminal morphologies were found, i.e.,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: V1 intracortical projections; Neurons; Axon terminals; Visual cortex; Primate.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200018
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Influence of schooling and age on cognitive performance in healthy older adults BJMBR
Bento-Torres,N.V.O.; Bento-Torres,J.; Tomás,A.M.; Costa,V.O.; Corrêa,P.G.R.; Costa,C.N.M.; Jardim,N.Y.V.; Picanço-Diniz,C.W..
Few studies have examined the influence of a low level of schooling on age-related cognitive decline in countries with wide social and economic inequalities by using the Cambridge Automated Neuropsychological Test Battery (CANTAB). The aim of the present study was to assess the influence of schooling on age-related cognitive decline using unbiased cognitive tests. CANTAB allows cognitive assessment across cultures and education levels with reduced interference of the examiner during data acquisition. Using two-way ANOVA, we assessed the influences of age and education on test scores of old adults (61–84 years of age). CANTAB tests included: Visual Sustained Attention, Reaction Time, Spatial Working Memory, Learning and Episodic Memory. All subjects had a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Age-related cognitive decline; Primary prevention; Education; Neuropsychological tests; Memory; Neuroscience; CANTAB.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000400702
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Methylmercury intoxication and histochemical demonstration of NADPH-diaphorase activity in the striate cortex of adult cats BJMBR
Oliveira,R.B.; Gomes-Leal,W.; do-Nascimento,J.L.M.; Picanço-Diniz,C.W..
The effects of methylmercury (MeHg) on histochemical demonstration of the NADPH-diaphorase (NADPH-d) activity in the striate cortex were studied in 4 adult cats. Two animals were used as control. The contaminated animals received 50 ml milk containing 0.42 µg MeHg and 100 g fish containing 0.03 µg MeHg daily for 2 months. The level of MeHg in area 17 of intoxicated animals was 3.2 µg/g wet weight brain tissue. Two cats were perfused 24 h after the last dose (group 1) and the other animals were perfused 6 months later (group 2). After microtomy, sections were processed for NADPHd histochemistry procedures using the malic enzyme method. Dendritic branch counts were performed from camera lucida drawings for control and intoxicated animals (N = 80). Average,...
Tipo: Info:eu-repo/semantics/other Palavras-chave: NADPH-dehydrogenase; Visual cortex; Neurotoxicity; Neuropil; Mercury.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000900009
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Microglia and neurons in the hippocampus of migratory sandpipers BJMBR
Diniz,C.G.; Magalhães,N.G.M.; Sousa,A.A.; Santos Filho,C.; Diniz,D.G.; Lima,C.M.; Oliveira,M.A.; Paulo,D.C.; Pereira,P.D.C.; Sherry,D.F.; Picanço-Diniz,C.W..
The semipalmated sandpiper Calidris pusilla and the spotted sandpiper Actitis macularia are long- and short-distance migrants, respectively. C. pusilla breeds in the sub-arctic and mid-arctic tundra of Canada and Alaska and winters on the north and east coasts of South America. A. macularia breeds in a broad distribution across most of North America from the treeline to the southern United States. It winters in the southern United States, and Central and South America. The autumn migration route of C. pusilla includes a non-stop flight over the Atlantic Ocean, whereas autumn route of A. macularia is largely over land. Because of this difference in their migratory paths and the visuo-spatial recognition tasks involved, we hypothesized that hippocampal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hippocampus; Neurons; Microglia; Shorebirds; Stereology; Morphometry.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000100603
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Morphometric analysis of feedforward pathways from the primary somatosensory area (S1) of rats BJMBR
Sá,A.L. de; Bahia,C.P.; Correa,V.C.; Dias,I.A.; Batista,C.; Gomes-Leal,W.; Pinho,A.L.S.; Houzel,J.C.; Picanço-Diniz,C.W.; Pereira,A..
We used biotinylated dextran amine (BDA) to anterogradely label individual axons projecting from primary somatosensory cortex (S1) to four different cortical areas in rats. A major goal was to determine whether axon terminals in these target areas shared morphometric similarities based on the shape of individual terminal arbors and the density of two bouton types: en passant (Bp) and terminaux (Bt). Evidence from tridimensional reconstructions of isolated axon terminal fragments (n=111) did support a degree of morphological heterogeneity establishing two broad groups of axon terminals. Morphological parameters associated with the complexity of terminal arbors and the proportion of beaded Bp vs stalked Bt were found to differ significantly in these two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Somatosensory cortex; Barrel field; Feedforward networks; Axon terminal; Axon morphometry.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000600601
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NADPH-diaphorase activity in area 17 of the squirrel monkey visual cortex: neuropil pattern, cell morphology and laminar distribution BJMBR
Franca,J.G.; do-Nascimento,J.L.M.; Picanço-Diniz,C.W.; Quaresma,J.A.S.; Silva,A.L.C..
We studied the distribution of NADPH-diaphorase activity in the visual cortex of normal adult New World monkeys (Saimiri sciureus) using the malic enzyme "indirect" method. NADPH-diaphorase neuropil activity had a heterogeneous distribution. In coronal sections, it had a clear laminar pattern that was coincident with Nissl-stained layers. In tangential sections, we observed blobs in supragranular layers of V1 and stripes throughout the entire V2. We quantified and compared the tangential distribution of NADPH-diaphorase and cytochrome oxidase blobs in adjacent sections of the supragranular layers of V1. Although their spatial distributions were rather similar, the two enzymes did not always overlap. The histochemical reaction also revealed two different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitric oxide synthase; Neocortex; NADPH-diaphorase; Cytochrome oxidase; Primates.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000900008
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Small-scale environmental enrichment and exercise enhance learning and spatial memory of Carassius auratus, and increase cell proliferation in the telencephalon: an exploratory study BJMBR
Abreu,C.C.; Fernandes,T.N.; Henrique,E.P.; Pereira,P.D.C.; Marques,S.B.; Herdeiro,S.L.S.; Oliveira,F.R.R.; Magalhães,N.G.M.; Anthony,D.C.; Melo,M.A.D.; Guerreiro-Diniz,C.; Diniz,D.G.; Picanço-Diniz,C.W..
Carassius auratus is a teleost fish that has been largely used in behavioral studies. However, little is known about potential environmental influences on its performance of learning and memory tasks. Here, we investigated this question in C. auratus, and searched for potential correlation between exercise and visuospatial enrichment with the total number of telencephalic glia and neurons. To that end, males and females were housed for 183 days in either an enriched (EE) or impoverished environment (IE) aquarium. EE contained toys, natural plants, and a 12-hour/day water stream for voluntary exercise, whereas the IE had none of the above. A third plus-maze aquarium was used for spatial and object recognition tests. Different visual clues in 2 of its 4 arms...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carassius auratus; Spatial learning and memory; Object recognition; Stereology; Telencephalon; Environmental enrichment.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000500602
Registros recuperados: 7
Primeira ... 1 ... Última
 

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