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Related Concept Videos

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.
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Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
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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,...
Long-term Depression01:05

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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.
Long-term Depression01:03

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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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Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
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Related Experiment Video

Updated: Jun 16, 2026

A New Method for Inducing a Depression-Like Behavior in Rats
07:57

A New Method for Inducing a Depression-Like Behavior in Rats

Published on: February 22, 2018

[Severe depression : morbidity-mortality and suicide].

P Hardy1

  • 1Univ Paris-Sud, U669, Le Kremlin Bicêtre, F-94276 ; AP-HP, Le Kremlin-Bicêtre, F-94275. patrick.hardy@bct.aphp.fr

L'Encephale
|February 10, 2010
PubMed
Summary
This summary is machine-generated.

Severe depression significantly increases suicide risk and mortality from natural causes, especially cardiovascular disease. Early prevention and screening for these conditions in depressed patients are crucial.

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An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents
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Published on: December 2, 2015

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Last Updated: Jun 16, 2026

A New Method for Inducing a Depression-Like Behavior in Rats
07:57

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An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents
06:55

An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents

Published on: December 2, 2015

Area of Science:

  • Psychiatry
  • Clinical Medicine
  • Epidemiology

Context:

  • Depression is a common psychiatric disorder with significant morbidity and mortality.
  • Severe depression is linked to a higher risk of suicide and premature death from natural causes.
  • Cardiovascular diseases, particularly coronary conditions, are a notable cause of increased mortality in severe depression.

Purpose:

  • To highlight the severe impact of depression on mortality, including suicide and natural causes.
  • To emphasize the increased risk of cardiovascular diseases in individuals with severe depression.
  • To advocate for the development of prevention and screening strategies for cardiovascular diseases in depressed populations.

Summary:

  • The severity of depression correlates with clinical features and impacts morbidity and mortality.
  • Severe depression elevates long-term suicide risk by 4-5 times compared to milder forms.
  • Increased mortality from natural causes, similar in absolute terms to suicide, is associated with severe depression, with cardiovascular diseases being prominent.

Impact:

  • Findings underscore the critical need for integrated care models addressing both mental and physical health in severe depression.
  • Establishes a strong rationale for proactive cardiovascular screening and intervention in patients with severe depression.
  • Highlights depression as a significant risk factor for premature mortality, necessitating public health attention and targeted interventions.