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Related Concept Videos

Intellectual Disability01:29

Intellectual Disability

Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Learning disabilities are cognitive disorders caused by neurological impairments that affect cognitive functions like language and reading, without indicating overall intellectual or developmental challenges. These disabilities differ from global intellectual or developmental disabilities as they are limited to distinct cognitive functions. Common learning disabilities include dysgraphia, dyslexia, and dyscalculia, each of which impacts unique aspects of learning.
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Dynamic Clamp Methods to Investigate Impaired Neuronal Excitability Associated with Autism
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Synaptic dysfunction and intellectual disability.

Pamela Valnegri1, Carlo Sala, Maria Passafaro

  • 1CNR Institute of Neuroscience, Department of Pharmacology, University of Milan, Via Vanvitelli 32, 20129 Milan, Italy.

Advances in Experimental Medicine and Biology
|February 22, 2012
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Summary

Intellectual disability (ID) arises from genetic and environmental factors impacting brain function. This research explores how small GTPases and adhesion molecules contribute to synaptic network dysfunction in ID.

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Intellectual disability (ID) is a prevalent, heterogeneous pediatric disorder with significant social implications.
  • While numerous causative genes for ID have been identified, their precise impact on brain function remains largely unknown.
  • Mutated genes in ID often encode proteins involved in crucial cellular processes like chromatin remodeling, synaptic activity, and intracellular trafficking.

Purpose of the Study:

  • To investigate the role of small GTPases and adhesion molecules in the pathophysiology of intellectual disability.
  • To elucidate the mechanisms by which these molecules contribute to synaptic network dysfunction in ID.

Main Methods:

  • Focus on the functional roles of small GTPases in cellular processes relevant to neuronal development and function.
  • Analysis of adhesion molecules and their involvement in synaptic formation and maintenance.
  • Discussion of how disruptions in these pathways lead to pre- and/or post-synaptic dysfunction.

Main Results:

  • Small GTPases and adhesion molecules are critical for normal brain development and synaptic function.
  • Dysregulation of small GTPases can impair intracellular trafficking and protein localization at synapses.
  • Altered function of adhesion molecules can disrupt synaptic connectivity and network formation.

Conclusions:

  • Abnormalities in small GTPases and adhesion molecules represent a significant pathway leading to intellectual disability.
  • Targeting these molecular pathways may offer future therapeutic strategies for ID.
  • Understanding the molecular basis of synaptic dysfunction is key to addressing the challenges of intellectual disability.