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Long-term depression in the CNS

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TLDR
Converging evidence supports a crucial role of LTD in some types of learning and memory and in situations in which cognitive demands require a flexible response.
Abstract
Long-term depression (LTD) in the CNS has been the subject of intense investigation as a process that may be involved in learning and memory and in various pathological conditions. Several mechanistically distinct forms of this type of synaptic plasticity have been identified and their molecular mechanisms are starting to be unravelled. Most studies have focused on forms of LTD that are triggered by synaptic activation of either NMDARs (N-methyl-D-aspartate receptors) or metabotropic glutamate receptors (mGluRs). Converging evidence supports a crucial role of LTD in some types of learning and memory and in situations in which cognitive demands require a flexible response. In addition, LTD may underlie the cognitive effects of acute stress, the addictive potential of some drugs of abuse and the elimination of synapses in neurodegenerative diseases.

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About sleep's role in memory

TL;DR: This review aims to comprehensively cover the field of "sleep and memory" research by providing a historical perspective on concepts and a discussion of more recent key findings.
Journal ArticleDOI

Gene discovery and polygenic prediction from a genome-wide association study of educational attainment in 1.1 million individuals

James J. Lee, +94 more
- 23 Jul 2018 - 
TL;DR: A joint (multi-phenotype) analysis of educational attainment and three related cognitive phenotypes generates polygenic scores that explain 11–13% of the variance ineducational attainment and 7–10% ofthe variance in cognitive performance, which substantially increases the utility ofpolygenic scores as tools in research.
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Sleep and the Price of Plasticity: From Synaptic and Cellular Homeostasis to Memory Consolidation and Integration

TL;DR: This Perspective considers the rationale and evidence for the synaptic homeostasis hypothesis (SHY), and points to open issues related to sleep and plasticity.
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Synaptic Dysfunction in Depression: Potential Therapeutic Targets

TL;DR: Findings highlight the central importance of homeostatic control of mood circuit connections and form the basis of a synaptogenic hypothesis of depression and treatment response.
References
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Book

The Hippocampus as a Cognitive Map

John O'Keefe, +1 more
TL;DR: The amnesic syndrome is presented as an extension of the theory to humans and the role of operators in the locale system is examined.
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The medial temporal lobe

TL;DR: This analysis draws on studies of human memory impairment and animal models of memory impairment, as well as neurophysiological and neuroimaging data, to show that this system is principally concerned with memory and operates with neocortex to establish and maintain long-term memory.
Journal ArticleDOI

In Vivo Protein Transduction: Delivery of a Biologically Active Protein into the Mouse

TL;DR: It is shown that intraperitoneal injection of the 120-kilodalton beta-galactosidase protein, fused to the protein transduction domain from the human immunodeficiency virus TAT protein, results in delivery of the biologically active fusion protein to all tissues in mice, including the brain.
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Synaptic plasticity and memory: an evaluation of the hypothesis

TL;DR: It is concluded that a wealth of data support the notion that synaptic plasticity is necessary for learning and memory, but that little data currently supports the notion of sufficiency.
Journal ArticleDOI

Excitatory amino acids in synaptic transmission in the Schaffer collateral-commissural pathway of the rat hippocampus.

TL;DR: Results indicate that the synaptic receptor in the Schaffer collateral‐commissural pathway may be of the kainate or quisqualate type and although NMA receptors do not appear to be involved in normal synaptic transmission in this pathway they may play a role in synaptic plasticity.
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