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Related Concept Videos

Lift01:23

Lift

Lift is a fundamental aerodynamic force that acts perpendicular to the direction of airflow. It plays a central role in achieving and sustaining flight and in stabilizing various vehicles. Lift primarily originates from pressure differences created across surfaces, such as an airfoil. A lower pressure region forms above the wing, while a higher pressure region forms below it, generating an upward force. This differential results from the shape and orientation of the airfoil, enabling the wing...
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.
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...
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,...
Depressive Disorders: MDD and Dysthymia01:27

Depressive Disorders: MDD and Dysthymia

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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Unrealistic Optimism Bias

Unrealistic optimism bias is the tendency to overestimate the likelihood of positive outcomes. This cognitive bias makes individuals believe they are less likely to experience failures, setbacks, or risks and more likely to succeed than others. For example, people may assume they are less prone to health issues, accidents, or financial struggles than their peers, even when they share similar risk factors.One key component of this bias is the above-average effect, where individuals perceive...

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Updated: Jun 27, 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

Lifting the gloom.

Lynne Pearce

    Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
    |December 6, 2008
    PubMed
    Summary
    This summary is machine-generated.

    Most older adults with depression remain undiagnosed and untreated. Age Concern

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    Last Updated: Jun 27, 2026

    A New Method for Inducing a Depression-Like Behavior in Rats
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    A Chronic Immobilization Stress Protocol for Inducing Depression-Like Behavior in Mice
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    A Chronic Immobilization Stress Protocol for Inducing Depression-Like Behavior in Mice

    Published on: May 15, 2019

    Area of Science:

    • Gerontology
    • Psychiatry
    • Public Health

    Background:

    • Depression significantly impacts the well-being of older adults.
    • A substantial portion of elderly individuals experiencing depression do not receive adequate diagnosis or treatment.

    Purpose of the Study:

    • To highlight the issue of underdiagnosed and untreated depression in the elderly population.
    • To advocate for increased governmental and National Health Service (NHS) focus on geriatric depression.

    Main Methods:

    • Analysis of data and reports concerning mental health in older populations.
    • Public awareness campaign ('Down, But Not Out') by Age Concern.

    Main Results:

    • The majority of older individuals with depression are not identified or treated.
    • There is a need for greater prioritization of mental health services for the elderly.

    Conclusions:

    • Urgent action is required to address the unmet mental health needs of older adults.
    • The government and NHS must prioritize depression in old age to improve care and outcomes.