نتایج جستجو برای: 1997 afterwards
تعداد نتایج: 94820 فیلتر نتایج به سال:
We discuss paradigmatic properties of the activity of single cells comprising an attractor-a developed stable delay activity distribution. To demonstrate these properties and a methodology for measuring their values, we present a detailed account of the spike activity recorded from a single cell in the inferotemporal cortex of a monkey performing a delayed match-to-sample (DMS) task of visual i...
The spike-diffuse-spike (SDS) model describes a passive dendritic tree with active dendritic spines. Spine-head dynamics is modelled with a simple integrate-and-fire process, whilst communication between spines is mediated by the cable equation. Here we develop a computational framework that allows the study of multiple spiking events in a network of such spines embedded in a simple one-dimensi...
The analysis of the spatial and temporal structure of spike cross-correlation in experimental data is an important tool in the exploration of cortical processing. Recent theoretical studies investigated the impact of correlation between a$erents on the spike rate of single neurons and the e$ect of input correlation on the output correlation of pairs of neurons. Here, this knowledge is combined ...
In the spiked population model introduced by Johnstone [10], the population covariance matrix has all its eigenvalues equal to unit except for a few fixed eigenvalues (spikes). The question is to quantify the effect of the perturbation caused by the spike eigenvalues. Baik and Silverstein [6] establishes the almost sure limits of the extreme sample eigenvalues associated to the spike eigenvalue...
Objectives: Depression is the most common mood and psychiatric disorder. The aim of this study was to provide a clear picture of the prevalence, risk factors and interventions of depression in Iranian elderly. Methods & Materials: This study is a systematic review. Statistic population included Farsi and English studies with various aspects of depression in elderly. Keywords "Depression...
Removal of Large Calculi, First from One Kidney and Afterwards from the Other; Death from Hæmorrhage
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