Related Experiment Video
Updated: Oct 23, 2026

A New Method for Inducing a Depression-Like Behavior in Rats
Published on: February 22, 2018
The development of depressive symptoms in elderly following onset of severe physical illness
1Department of Psychiatry, University of Iowa School of Medicine, Iowa City.
Abstract:
This study followed a group of elderly patients (ill group) with recent onset of life-threatening or severely debilitating illness to determine development of depressive symptoms. Age- and sex-matched control patients were included for comparison. Depressive symptoms increased significantly in the group of ill male patients when compared with controls. Depressive symptoms did not show an increase in the group of ill female patients. Other variables also predicted increased depression: (1) an initial placement in nursing home, (2) a prior history of depression or higher initial level of depressive symptoms, (3) the presence of larger numbers of additional medical illnesses, and (4) following the occurrence of stressful life events. The increase in depression in the male test group was still present and significant when controlling for these additional four factors.
Related Concept Videos
Depression: Overview
Drug Dosing: Geriatric Patients
Cognitive Development During Adulthood
Stress and Mental Health
Individuals with depression often experience challenges in both their personal and professional...
Depressive Disorders: MDD and Dysthymia
Depressive Disorders: Etiology
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...

