نتایج جستجو برای: ca1 region
تعداد نتایج: 545470 فیلتر نتایج به سال:
The hippocampus appears to undergo continual representational reorganization as animals navigate their environments. This reorganization is postulated to be reflected spatially in terms of changes in the ensemble of place cells activated, as well as changes in place field specificity and reliability for cells recorded in both hilar/CA3 and CA1 regions. The specific contribution of the hilar/CA3...
Effects of Ginkgo biloba extract on the structure of Cornu Ammonis in aged rat: A morphometric study
Objective(s):Growing evidence indicates that extract of Ginkgo biloba (EGb) attenuates hippocampal-dependent memory deficit in aged individuals; however, very little is known about the effect of EGb on the structure of hippocampus. Therefore we examined the EGb-induced morphological changes of the Cornu Ammonis (CA) region in aged rats. Materials and Methods: Sixteen aged male Wistar rats, 24 ...
A major challenge to understanding cortical function is the complexity found both at the single cell and microcircuit levels. Here we outline what is known about the microcircuitry of the CA1 region of the mammalian hippocampus. We then explore the possible functional roles of the variety of neuronal types within this microcircuit during dynamic information processing. This is considered within...
Quantitative receptor autoradiography was used to measure the binding of gamma-aminobutyric acid (GABA) and benzodiazepine receptors after ischemia by means of transient occlusion of bilateral common carotid arteries in the gerbil. [3H]Muscimol was used to label the GABAA receptors and [3H]flunitrazepam to label central type benzodiazepine receptors. In the superolateral convexities of the fron...
Based on evidence suggesting that deep brain stimulation (DBS) may promote certain cognitive processes, we have been interested in developing DBS as a means of mitigating memory and learning impairments in Alzheimer’s disease (AD). In this study we used an animal model of AD (TgCRND8 mice) to determine the effects of high-frequency stimulation (HFS) on non-amyloidogenic α-secretase activity and...
One interesting finding of controlled cortical impact (CCI) experiments is that the CA3 region of the hippocampus, which is positioned further from the impact than the CA1 region, is reported as being more injured. The current literature has suggested a positive correlation between brain tissue stretch and neuronal cell loss. However, it is counterintuitive to assume that CA3 is stretched more ...
Background & Aim: Hippocampal CA1 region is the most common area in the development of temporal lobe epilepsy and piriform cortex is recognized as an important structure involved in the control of kindled seizures. This fundamental study dealt with the role of adenosine A1 receptors of piriform cortex in CA1 hippocampal kindled seizures in rats. Material & Method: We implanted a tripolar el...
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