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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
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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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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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Working memory in posterior cortical atrophy.

Laura Trotta1,2, Delphine Lamoureux1,2, Paolo Bartolomeo1

  • 1INSERM U 1127, CNRS UMR 7225, Institut du cerveau et de la moelle épinière (ICM), Sorbonne Université, Hôpital de la Pitié-Salpêtrière, Paris, France.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|April 10, 2019
PubMed
Summary
This summary is machine-generated.

Posterior cortical atrophy (PCA) patients exhibit significant verbal and visuospatial working memory (WM) deficits, exceeding those seen in typical Alzheimer's disease (AD). This highlights the need for systematic WM assessment in PCA for better patient care.

Keywords:
Alzheimer’s diseaseNeuropsychological assessmentParietal lobePosterior cortical atrophyWorking memory

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Psychology

Background:

  • Posterior cortical atrophy (PCA) is a rare neurodegenerative dementia, often linked to Alzheimer's disease (AD) pathology.
  • PCA clinically manifests with prominent visual, visuospatial, and visuomotor deficits, typically without initial memory complaints.

Purpose of the Study:

  • To comprehensively evaluate verbal and visuospatial working memory (WM) in patients with PCA.
  • To compare the WM performance patterns of PCA patients with those of typical amnestic AD patients and healthy controls.

Main Methods:

  • Utilized a custom-designed neuropsychological battery to assess working memory (WM).
  • Compared performance of 5 PCA patients against 11 amnestic AD patients and 17 healthy controls, matched for disease severity and age.

Main Results:

  • Both PCA and AD patient groups demonstrated impaired WM compared to healthy controls.
  • PCA patients showed significantly greater impairments in both verbal and visuospatial WM compared to typical AD patients.
  • Visuospatial WM deficits were more consistently observed in PCA patients than verbal WM deficits.

Conclusions:

  • Systematic evaluation of working memory (WM) is crucial for the standard clinical assessment of PCA.
  • Working memory impairments significantly impact the quality of life and rehabilitation outcomes for PCA patients.