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Related Concept Videos

Amnesia01:13

Amnesia

335
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...
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Dissociative Amnesia01:21

Dissociative Amnesia

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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...
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Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

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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...
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Traumatic Memory01:20

Traumatic Memory

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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Dissociative Disorders01:27

Dissociative Disorders

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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...
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Forgetting01:21

Forgetting

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Forgetting is an intrinsic aspect of human memory, characterized by the gradual loss or inaccessibility of information over time. Hermann Ebbinghaus, a pioneering psychologist, extensively studied this phenomenon and formulated the forgetting curve. This curve illustrates that memory loss occurs rapidly immediately after learning and then decelerates over time. Several mechanisms contribute to forgetting, including encoding failure, storage decay, retrieval failure, and interference.
Encoding...
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Related Experiment Video

Updated: Dec 15, 2025

Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury
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Transient Global Amnesia - Risk Factors and Putative Background.

Marta Waliszewska-Prosol1, Marta Nowakowska-Kotas1, Joanna Bladowska2

  • 1Department of Neurology, Interventional Radiology and Neuroradiology, Wroclaw Medical University, Poland.

Neurology India
|July 10, 2020
PubMed
Summary

Transient global amnesia (TGA) may stem from cerebrovascular issues, not epilepsy or migraine. Autoimmune thyroiditis warrants further study as a potential TGA comorbidity.

Keywords:
Autoimmune thyroiditismigrainetransient global amnesiavascular risk factor

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Area of Science:

  • Neurology
  • Neuroscience

Background:

  • Transient global amnesia (TGA) is characterized by temporary, reversible memory loss.
  • The underlying causes and contributing factors of TGA remain incompletely understood.
  • Various hypotheses exist regarding the etiology of TGA.

Purpose of the Study:

  • To investigate the clinical characteristics, neuroimaging, and electrophysiological findings in TGA patients.
  • To explore potential comorbidities and seasonal variations associated with TGA.
  • To identify possible underlying mechanisms contributing to TGA.

Main Methods:

  • Analysis of 56 TGA patients hospitalized between 2008 and 2016.
  • Review of clinical data, neuroimaging (Doppler ultrasonography), and electroencephalography (EEG) findings.
  • Assessment of patient comorbidities and seasonal patterns.

Main Results:

  • Most patients (92.9%) experienced their first TGA episode.
  • Potential triggers were identified in 39.3% of cases.
  • Common comorbidities included hypertension (60.7%), dyslipidemia (48.2%), and autoimmune thyroiditis (17.9%).
  • Cerebrovascular abnormalities were detected in 51.8% of patients via carotid artery Doppler.
  • EEG abnormalities were present in 17.6% of patients.

Conclusions:

  • Findings suggest a potential cerebrovascular origin for TGA.
  • No association was found between TGA and epilepsy or migraine.
  • Autoimmune thyroiditis is highlighted as a comorbidity requiring further investigation for its potential link to TGA.