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Related Concept Videos

Dementia l: Introduction01:22

Dementia l: Introduction

Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
Dementia01:30

Dementia

Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual.
Dissociative Identity Disorder01:30

Dissociative Identity Disorder

Dissociative Identity Disorder (DID), previously termed multiple personality disorder, is a complex psychological condition characterized by the presence of two or more distinct identities or personality states. Each identity exhibits unique patterns of behavior, voice, and mannerisms and may possess separate memories and emotional responses. The alternating control between identities can result in memory gaps and challenges in recalling daily activities, often exacerbating the individual's...
Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
Dissociative Disorders01:27

Dissociative Disorders

Dissociative disorders represent complex psychological conditions characterized by disruptions in consciousness, memory, identity, or perception. These disruptions cause individuals to experience a disconnection from their thoughts, emotions, and memories. The phenomenon is not merely an occasional lapse in attention but a profound alteration in mental functioning that can severely impact daily life.
Dissociative Fugue
A hallmark feature of dissociative disorders is the dissociative fugue...
Positive Symptoms Schizophrenia: Hallucinations and Delusions01:26

Positive Symptoms Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
Hallucinations
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Related Experiment Video

Updated: Jul 2, 2026

Dual-Task Stroop Paradigm for Detecting Cognitive Deficits in High-Functioning Stroke Patients
07:42

Dual-Task Stroop Paradigm for Detecting Cognitive Deficits in High-Functioning Stroke Patients

Published on: December 16, 2022

Double trouble: when delirium complicates dementia.

Denise L Lyons1, Shannon M Grimley, Linda Sydnor

  • 1Improve Senior Health for Christiana Care Health System in Newark, Del, USA.

Nursing
|August 23, 2008
PubMed
Summary

Protect patients with dementia from delirium, a disabling condition that can worsen cognitive function. Early recognition and intervention are key to preventing long-term negative effects.

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The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents
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Last Updated: Jul 2, 2026

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Published on: December 16, 2022

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The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents

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Area of Science:

  • Gerontology
  • Neurology
  • Critical Care Medicine

Background:

  • Dementia is a progressive neurodegenerative syndrome.
  • Delirium is an acute confusional state.
  • Patients with dementia are at higher risk for delirium.

Observation:

  • Delirium can exacerbate cognitive decline in dementia patients.
  • Delirium can lead to prolonged hospital stays and increased mortality.
  • Identifying and managing delirium is crucial for this vulnerable population.

Findings:

  • Implementing a delirium prevention protocol can reduce incidence.
  • Early detection through screening tools improves outcomes.
  • Multicomponent interventions are effective in managing delirium.

Implications:

  • Improved patient outcomes and quality of life for dementia patients.
  • Reduced healthcare costs associated with prolonged hospitalizations.
  • Enhanced clinical practice guidelines for managing delirium in dementia.