Acute and Chronic Altitude-Induced Cognitive Dysfunction in Children and Adolescents

Area of Science:

• Pediatric Neurology
• Altitude Medicine
• Cognitive Neuroscience

Background:

• High altitude environments pose physiological challenges.
• Cognitive function in children at high altitudes is not well understood.

Purpose of the Study:

• To evaluate cognitive dysfunction in children and adolescents due to acute high-altitude exposure (3450 m).
• To compare cognitive function in children acutely exposed to high altitude versus those permanently residing there.

Main Methods:

• Neuropsychological tests assessed executive function, memory, and processing speed.
• Study included nonacclimatized children (acute exposure), children permanently at high altitude, and a low-altitude control group.
• Testing occurred 24 hours after arrival at high altitude and 3 months post-return to low altitude.

Main Results:

• Short-term hypoxia significantly impaired executive function and memory, excluding visuospatial memory and processing speed.
• Cognitive impairments were more pronounced in children permanently living at high altitude.
• Significant improvement in cognitive performance was observed 3 months after returning to low altitude.

Conclusions:

• Acute exposure to high altitude causes significant executive and memory deficits in healthy children.
• Children permanently residing at high altitude experience equally or more severe cognitive deficits.
• These deficits are likely to negatively impact children's learning capabilities.