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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...
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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...
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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...
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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...
Traumatic Memory01:20

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

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A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury
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Published on: June 20, 2017

Transient global amnesia.

Gary Hunter1

  • 1Division of Neurology, University of Saskatchewan, #112, 3502 Taylor Street East, Saskatoon, SK S7H 5H9, Canada. grwhunter@gmail.com

Neurologic Clinics
|October 29, 2011
PubMed
Summary
This summary is machine-generated.

Transient global amnesia (TGA) is a recognizable neurological condition with unclear causes. Research explores potential mechanisms like ischemia and diffusion restriction, but its exact nature remains uncertain.

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Area of Science:

  • Neurology
  • Neuroimaging
  • Neuroscience

Background:

  • Transient global amnesia (TGA) has been recognized for over a century.
  • The clinical presentation of TGA is distinct and consistent.
  • The underlying pathophysiology of TGA remains poorly understood.

Purpose of the Study:

  • To review the clinical features, proposed pathophysiology, and epidemiology of TGA.
  • To discuss the role of neuroimaging, particularly diffusion-weighted imaging (DWI), in TGA.
  • To highlight future research directions for understanding TGA.

Main Methods:

  • Review of existing literature on transient global amnesia.
  • Analysis of proposed pathophysiological mechanisms, including ischemic and non-ischemic theories.
  • Evaluation of findings from diffusion-weighted imaging studies in TGA patients.

Main Results:

  • TGA is characterized by a sudden, temporary episode of memory loss.
  • Diffusion-weighted imaging can reveal focal areas of restricted diffusion in TGA.
  • The interpretation of diffusion restriction in TGA is uncertain and does not confirm ischemia.

Conclusions:

  • The exact cause of transient global amnesia remains elusive.
  • While imaging shows changes, the precise mechanism underlying TGA is still debated.
  • Further research is needed to clarify the nature of this benign neurological disorder.