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Related Concept Videos

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Higher Mental Functions of the Brain: Language

Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
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The tip-of-the-tongue (TOT) phenomenon is a cognitive experience characterized by a temporary inability to retrieve specific information from memory despite having a strong feeling of knowing the information. Although individuals cannot access the target word or detail, they frequently recall related elements, such as its initial letter, syllable count, or context. This partial retrieval often causes frustration, as one might recognize a familiar face or know that a name starts with a specific...
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Related Experiment Video

Updated: Jul 12, 2026

Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
10:15

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Published on: July 2, 2013

Transient high altitude expressive aphasia.

T E Dietz1, V H McKiel

  • 1Emergency Department, Providence Hood River Memorial Hospital, OR 97031, USA. tdietz@high-altitude-medicine.com

High Altitude Medicine & Biology
|March 20, 2001
PubMed
Summary

High altitude climbers can experience temporary expressive aphasia, a form of speech difficulty. This transient focal neurological deficit may be linked to migraine aura, offering insights into altitude-related neurological symptoms.

Area of Science:

  • Neurology
  • Altitude Medicine
  • Environmental Physiology

Background:

  • Transient focal neurological deficits are known in individuals ascending to high altitudes.
  • Understanding these neurological effects is crucial for high-altitude explorers and medical professionals.

Observation:

  • Two cases of transient expressive aphasia (difficulty producing speech) were observed in well-acclimatized high-altitude climbers.
  • These episodes were temporary and resolved without lasting impairment.

Findings:

  • The observed transient expressive aphasia is hypothesized to be a manifestation of migraine aura.
  • This aligns with other reported instances of transient focal neurological deficits occurring at high altitudes.

Implications:

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Last Updated: Jul 12, 2026

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  • This suggests a potential link between migraine pathophysiology and acute neurological changes at high altitude.
  • Further research is warranted to elucidate the mechanisms and prevalence of such phenomena in high-altitude environments.