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Verbal Amnesia Secondary to Unilateral Infarct of the Mediodorsal Thalamic Nucleus

Haley Pysick1, Donn Dexter2, Christopher Lindsay3

  • 1Department of Internal Medicine, University of Iowa Hospital and Clinics, Iowa City, Iowa.

WMJ : Official Publication of the State Medical Society of Wisconsin
|October 28, 2021
PubMed
Abstract

Insights

Damage to the mediodorsal nucleus can cause verbal amnesia, affecting both recall and recognition. High-resolution MRI is crucial for diagnosing thalamic infarcts.

Area of Science:

  • Neuroscience
  • Neurology
  • Neuroimaging

Background:

  • The mediodorsal nucleus (MDN) of the thalamus is implicated in memory pathways.
  • Its precise clinical significance remains unclear due to limited case studies and imaging data.

Observation:

  • A 53-year-old male presented with verbal amnesia, exhibiting deficits in both recall and recognition.
  • High-resolution magnetic resonance imaging (MRI) revealed a distinct infarct within the mediodorsal nucleus.

Findings:

  • Isolated lesions of the mediodorsal nucleus can result in significant impairments in verbal recall and recognition.
  • This case highlights the role of the MDN in memory function.

Implications:

  • Accurate diagnosis of thalamic infarcts requires high-resolution MRI.
  • Further research into the mediodorsal nucleus's role in memory is warranted.

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