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Related Concept Videos

Depression: Overview01:18

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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,...
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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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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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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.
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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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G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
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Related Experiment Video

Updated: Mar 2, 2026

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
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Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression

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[Are we able to measure depression?]

C Kornreich1, A Monnart1, S Ammendola1

  • 1Laboratoire de Psychologie Médicale, C.H.U. Brugmann, Place A. Van Gehuchten 4, Bruxelles, Belgium.

Revue Medicale De Bruxelles
|May 20, 2017
PubMed
Summary
This summary is machine-generated.

Depression is a complex disorder with varied symptoms and underlying brain circuit dysfunctions. While biological measures are challenging, psychometric scales like the Beck Depression Inventory aid in treatment evaluation.

Keywords:
DepressionMeasurePsychometricScales

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Clinical Psychology

Background:

  • Depression is a heterogeneous disorder with diverse emotional and cognitive symptoms.
  • Emotional symptoms involve fear and panic/grief circuits; cognitive symptoms relate to executive function deficits.
  • Specific cerebral circuit dysfunctions are linked to distinct depressive symptoms.

Purpose of the Study:

  • To explore the heterogeneity of depression's etiological and symptomatic presentation.
  • To discuss the challenges in biologically measuring depression due to its complexity.
  • To evaluate the utility of psychometric scales in assessing depression and treatment efficacy.

Main Methods:

  • Review of current understanding of depression's symptomatic and etiological heterogeneity.
  • Discussion of limitations in biological assessment methods (e.g., cerebral imagery, evoked potentials).
  • Comparative analysis of commonly used psychometric scales for depression assessment.

Main Results:

  • Depression presents with a wide range of emotional and cognitive symptoms.
  • Biological measurement of depression is complicated by its multifaceted nature.
  • Psychometric scales are valuable tools for evaluating treatment effectiveness and patient-therapist relationships.

Conclusions:

  • The heterogeneity of depression necessitates a nuanced approach to assessment.
  • Clinical impression remains crucial, but validated psychometric tools enhance evaluation.
  • The Beck Depression Inventory is recommended for its reliability and ease of clinical use.