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A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts
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Clinical Manifestations.

Pakapon Suesatchapong1,2, Nithit Singtokum3, Pharewa Kaewmanee3

  • 1King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 26, 2025
PubMed
Summary
This summary is machine-generated.

A new digital navigation task shows promise for early Alzheimer's disease (AD) detection by assessing entorhinal cortex (EC) function without prior learning. Performance selectively correlated with memory, not other cognitive skills, suggesting clinical utility.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Alzheimer's disease (AD) involves early entorhinal cortex (EC) changes impacting spatial navigation.
  • Current EC-dependent tasks for AD detection require lengthy learning periods, limiting clinical use.
  • A novel, rapid, non-spatial navigation task was developed to assess EC function.

Purpose of the Study:

  • To develop and validate a novel digital non-spatial navigation task for assessing entorhinal cortex (EC) function.
  • To determine if task performance correlates with memory and other cognitive domains.
  • To hypothesize that the task engages EC-hippocampal circuits without prior learning.

Main Methods:

  • 38 participants (40-70 years) completed a computerized 2D abstract navigation task.
  • The task involved identifying the correct fourth stimulus in a visual trajectory.
  • Performance was correlated with cognitive measures: MoCA, CDR, VPA delayed recall, WCST, Go/No-Go, and Spatial Span.

Main Results:

  • Navigation task accuracy correlated significantly with episodic memory measures (MoCA delayed recall, MoCA memory index, CDR memory, VPA delayed recall).
  • No significant correlations were found with non-memory cognitive domains.
  • Correlations remained significant after adjusting for age and education, except for VPA delayed recall.

Conclusions:

  • The novel non-spatial navigation task likely engages EC-hippocampal circuits, correlating selectively with episodic memory.
  • The task's no-learning-period design offers a clinical advantage over existing paradigms.
  • Further research is recommended to explore neural correlates and diagnostic potential in AD patients.