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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...
Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
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...
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 Memory01:20

Traumatic Memory

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...
Role of Amygdala in Memory01:16

Role of Amygdala in Memory

The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...

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Updated: Jun 19, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
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Acute amnesia in MS revisited.

A J Larner1, C A Young

  • 1Cognitive Function Clinic, Walton Centre for Neurology and Neurosurgery, Lower Lane, Fazakerley, Liverpool, L9 7LJ, UK. a.larner@thewaltoncentre.nhs.uk

International MS Journal
|November 3, 2009
PubMed
Summary

Acute amnesia is a rare symptom of multiple sclerosis (MS). This case highlights that demyelinating disease can present as amnesia, prompting consideration of MS in such rare instances.

Area of Science:

  • Neurology
  • Neuroimmunology
  • Cognitive Neuroscience

Background:

  • Cognitive impairments are common in multiple sclerosis (MS).
  • Acute amnesia is an exceptionally rare manifestation of MS.
  • Differentiating MS from other causes of amnesia is crucial for timely diagnosis and treatment.

Observation:

  • A case report details a patient presenting with acute-onset amnesia.
  • The patient's symptoms mimicked other neurological conditions.
  • Diagnostic workup revealed an underlying demyelinating disease.

Findings:

  • The patient was diagnosed with multiple sclerosis.
  • The amnesic presentation was attributed to acute demyelination.
  • This case underscores the atypical presentations of MS.

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Implications:

  • Clinicians should consider multiple sclerosis in patients with acute amnesia, even if rare.
  • Early recognition of demyelinating disease presenting as amnesia can improve patient outcomes.
  • This case expands the spectrum of clinical phenotypes associated with MS.