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Related Concept Videos

Amnesia01:13

Amnesia

Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
Dissociative Amnesia01:21

Dissociative Amnesia

Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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...
Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...

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Related Experiment Video

Updated: May 15, 2026

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury
04:19

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury

Published on: June 20, 2017

Transient amnesic syndromes.

Thorsten Bartsch1, Christopher Butler

  • 1Department of Neurology, Memory Disorders Group, University Hospital Schleswig-Holstein, University of Kiel, Schittenhelmstrasse 10, 24105 Kiel, Germany. t.bartsch@neurologie.uni-kiel.de

Nature Reviews. Neurology
|January 9, 2013
PubMed
Summary
This summary is machine-generated.

Transient amnesic syndromes, like transient global amnesia (TGA) and transient epileptic amnesia (TEA), present diagnostic challenges. Recent research clarifies distinctions and pathophysiology, aiding clinical management.

More Related Videos

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
10:59

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury

Published on: November 19, 2012

Related Experiment Videos

Last Updated: May 15, 2026

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury
04:19

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury

Published on: June 20, 2017

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
10:59

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury

Published on: November 19, 2012

Area of Science:

  • Neurology
  • Neuroscience
  • Clinical Medicine

Background:

  • Transient amnesic syndromes are frequently seen in acute care settings.
  • Their diagnosis and underlying causes have been debated for decades.
  • Distinguishing between transient global amnesia (TGA) and transient epileptic amnesia (TEA) is clinically crucial.

Observation:

  • Transient global amnesia (TGA) involves sudden, severe anterograde and retrograde amnesia lasting up to 24 hours.
  • Neuroimaging in TGA reveals temporary disruptions in hippocampal memory circuits.
  • Transient epileptic amnesia (TEA) presents similarly but is marked by brief, frequent amnesic episodes.

Findings:

  • Distinguishing TGA from TEA is crucial, as TEA carries a risk of persistent memory deficits resembling dementia.
  • Imaging studies highlight specific hippocampal circuit perturbations in TGA.
  • Epidemiological data and functional anatomy studies are illuminating the mechanisms of these amnesic syndromes.

Implications:

  • Accurate diagnosis of transient amnesic syndromes is essential for appropriate patient management.
  • Understanding the pathophysiology aids in developing targeted therapeutic strategies.
  • Distinguishing TEA from TGA can prevent misdiagnosis of dementia and guide prognosis.