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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...
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 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...
Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
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...
Tip-of-the-Tongue Phenomenon01:10

Tip-of-the-Tongue Phenomenon

The tip-of-the-tongue (TOT) phenomenon is a cognitive experience characterized by a temporary inability to retrieve specific information from memory despite having a strong feeling of knowing the information. Although individuals cannot access the target word or detail, they frequently recall related elements, such as its initial letter, syllable count, or context. This partial retrieval often causes frustration, as one might recognize a familiar face or know that a name starts with a specific...

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Related Experiment Video

Updated: Jun 27, 2026

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

[Idiopathic transient global amnesia].

Olivier Véran1, Marie Barré, Olivier Casez

  • 1Unité neurovasculaire, CHU de Grenoble. overan@chu-grenoble.fr

Psychologie & Neuropsychiatrie Du Vieillissement
|December 18, 2008
PubMed
Summary

Transient global amnesia (TGA) is a sudden, temporary memory loss, primarily affecting older adults. While usually resolving within 24 hours without lasting effects, TGA can be a distressing experience.

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

  • Neurology
  • Geriatrics
  • Psychology

Context:

  • Transient global amnesia (TGA) is a neurological condition presenting with acute memory impairment.
  • Primarily affects elderly individuals, characterized by severe anterograde and partial retrograde amnesia.
  • Diagnosis relies on clinical presentation, with further investigations reserved for atypical cases.

Purpose:

  • To describe the clinical characteristics, diagnosis, and pathophysiology of Transient Global Amnesia.
  • To highlight the transient nature and typical recovery pattern of TGA.
  • To underscore the psychological impact of TGA on patients and their families.

Summary:

  • TGA involves rapid-onset, temporary memory loss (under 24 hours), marked by severe anterograde amnesia, partial retrograde amnesia, and anxiety.
  • The exact cause is unknown but linked to temporary hippocampal perfusion and oxygenation issues, possibly triggered by stress or exertion.
  • Recovery is typically spontaneous and complete within 24 hours, with rare relapses, though it remains a psychologically impactful event.

Impact:

  • Provides a concise overview of TGA for clinicians and researchers.
  • Emphasizes the importance of clinical diagnosis in TGA management.
  • Raises awareness of the psychological burden associated with TGA, even with favorable prognosis.