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Related Concept Videos

Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
Long-term Depression01:03

Long-term Depression

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.
Calcium Ion Concentration Mechanism
If over time, all...
Long-term Depression01:05

Long-term Depression

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.
Depressive Disorders: Etiology01:27

Depressive Disorders: Etiology

Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
Depression: Overview01:18

Depression: Overview

Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
Plasticity00:58

Plasticity

Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...

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Related Experiment Video

Updated: Jul 3, 2026

Animal Models of Depression - Chronic Despair Model (CDM)
05:47

Animal Models of Depression - Chronic Despair Model (CDM)

Published on: September 23, 2021

[Depression and neuroplasticity].

W Pitchot1, M Polis, S Belachew

  • 1Service de Psychiatrie et de Psychologie Médicale, CHU Sart Tilman, Liège, Belgique.

Revue Medicale De Liege
|August 2, 2008
PubMed
Summary
This summary is machine-generated.

The classical monoaminergic theory does not explain antidepressant effects or delayed responses. Emerging research links depression to neuroplasticity, suggesting molecular and cellular changes drive treatment efficacy.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Molecular Biology

Context:

  • The classical monoaminergic theory inadequately explains antidepressant mechanisms and delayed clinical response.
  • Affective disorders, particularly depression, are associated with neuroanatomical lesions and neuronal loss in specific brain regions.
  • Antidepressant treatment has been observed to reverse these anatomical changes.

Purpose:

  • To review recent data linking depression and neuroplasticity.
  • To explore alternative hypotheses for antidepressant action beyond the monoaminergic theory.
  • To integrate molecular and cellular changes with synaptic rehabilitation in affective disorders.

Summary:

  • Antidepressant efficacy is not fully explained by the monoaminergic theory, failing to account for treatment delay.
  • Depression involves neuronal loss in specific brain areas, which can be ameliorated by antidepressant therapy.
  • A newer concept integrates molecular, cellular, and neuroplasticity changes induced by antidepressants, leading to synaptic recovery.

Impact:

  • Highlights the limitations of the traditional monoaminergic hypothesis for antidepressants.
  • Emphasizes the role of neuroplasticity in the pathophysiology and treatment of depression.
  • Provides a framework for understanding antidepressant action through molecular and cellular mechanisms affecting synaptic function.