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Degenerative Disc Disease I: Introduction01:27

Degenerative Disc Disease I: Introduction

Degenerative disc disease is a chronic condition in which intervertebral discs gradually lose structure and function. It is not infectious or autoimmune; rather, it results from age-related biochemical and mechanical changes, influenced by genetic, metabolic, and environmental factors.Structure and Function of DiscsThe spine contains 23 intervertebral discs that absorb load, distribute forces, maintain spacing, and allow flexibility. Each disc consists of a nucleus pulposus, a gel-like core...
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Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
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Updated: May 17, 2026

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
07:45

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

Published on: September 27, 2024

Dendritic spine changes associated with normal aging.

D L Dickstein1, C M Weaver, J I Luebke

  • 1Fishberg Department of Neuroscience, Friedman Brain Institute, Mount Sinai School of Medicine, New York, NY 10029, USA; Computational Neurobiology and Imaging Center, Mount Sinai School of Medicine, New York, NY 10029, USA.

Neuroscience
|October 17, 2012
PubMed
Summary
This summary is machine-generated.

Aging impacts brain structure, affecting cognition. Understanding these neural changes in successful versus unsuccessful cognitive aging is key to developing treatments for cognitive decline.

Keywords:
ChATDGDNMSDRSTGluRHCNN-methyl-d-aspartateNMDAOVXPFCPKCPSCsSAMPagingcAMPcholine acetyltransferasecognitioncyclic-AMPdelayed non-matching-to-sampledelayed recognition span testdendritic spinesdentate gyruselectrophysiologyglutamate receptorshyperpolarization-activated cyclic nucleotide-gatedmorphologyovariectomizedpostsynaptic currentsprefrontal cortexprotein kinase Csenescence-prone strains

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Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
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Analysis of Dendritic Spine Morphology in Cultured CNS Neurons
11:48

Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

Published on: July 13, 2011

Area of Science:

  • Neuroscience
  • Aging Research
  • Cognitive Science

Background:

  • Population aging is increasing, alongside age-related cognitive decline and neurodegenerative diseases.
  • Distinguishing neural changes between successful (unimpaired) and unsuccessful (impaired) cognitive aging is crucial.
  • The structural adaptations of neurons and dendritic spines during aging and their functional consequences are not well understood.

Purpose of the Study:

  • To review structural adaptations in neurons and dendritic spines during normal aging.
  • To discuss the contribution of these structural changes to electrophysiological properties and cognition.
  • To highlight the importance of understanding age-related synaptic changes for cognitive health.

Main Methods:

  • This is a review article, synthesizing existing research on neuronal and synaptic structural changes during aging.
  • It discusses the functional implications of these structural changes on electrophysiology and cognition.
  • The review focuses on differentiating changes in successful versus unsuccessful cognitive aging.

Main Results:

  • Aging involves structural adaptations in neurons and dendritic spines.
  • These structural changes likely impact neuronal electrophysiology and cognitive function.
  • Significant gaps remain in understanding the precise mechanisms and consequences of these age-related synaptic modifications.

Conclusions:

  • Elucidating age-related structural and functional synaptic changes is vital for understanding cognitive impairment.
  • Such knowledge may facilitate the development of therapeutic interventions to preserve or restore neural circuits.
  • This research is critical for promoting successful cognitive aging and mitigating age-related cognitive decline.