TY - JOUR
T1 - The Effects of Nocturnal Hypoxemia on Cognitive Performance in Andean Highlanders
AU - Young, Elizabeth V.
AU - Djokic, Matea A.
AU - Heinrich, Erica C.
AU - Marin, Traci
AU - Anza-Ramirez, Cecilia
AU - Orr, Jeremy E.
AU - Gilbertson, Dillon
AU - DeYoung, Pamela N.
AU - Vizcardo-Galindo, Gustavo
AU - Figueroa-Mujica, Rómulo
AU - Villafuerte, Francisco C.
AU - Malhotra, Atul
AU - Simonson, Tatum S.
N1 - Publisher Copyright:
© 2025 Mary Ann Liebert, (NY) LLC.
PY - 2025/11
Y1 - 2025/11
N2 - Young, Elizabeth V., Matea A. Djokic, Erica C. Heinrich, Traci Marin, Cecilia Anza-Ramirez, Jeremy E. Orr, Dillon Gilbertson, Pamela N. DeYoung, Gustavo Vizcardo-Galindo, Rómulo Figueroa-Mujica, Francisco C. Villafuerte, Atul Malhotra, and Tatum S. Simonson. The effects of nocturnal hypoxemia on cognitive performance in andean highlanders. High Alt Med Biol. 26:347–354, 2025. Background: Many Andean highlanders exposed to chronic hypoxemia are susceptible to excessive erythrocytosis (EE) and chronic mountain sickness (CMS). Nocturnal hypoxemia is more marked than diurnal hypoxemia and includes sustained and intermittent components. The potential for cognitive impairments related to nocturnal hypoxemia in this population has not been extensively studied, but improved understanding may provide opportunities for the prevention of long-term effects of EE and CMS. Methods: To examine this relationship, 48 participants residing permanently at 4, 340 m completed an overnight sleep study and a battery of cognitive function tests that examined a broad range of cognitive domains. Results: Greater nocturnal hypoxemia was associated with longer reaction times on Balloon Analogue Risk Task (BART) (p < 0.01) and Emotion Recognition Test (ERT) (p < 0.01). Longer completion times of Trail Making Task were also associated with increased nocturnal hypoxemia (p = 0.03). Increased hematocrit was similarly associated with longer reaction times on the ERT (p = 0.01) and the BART (p = 0.01). Conclusion: Overall, our results showed that increased nocturnal hypoxemia and higher hematocrit were associated with impairments in cognitive performance in individuals residing permanently at high altitude.
AB - Young, Elizabeth V., Matea A. Djokic, Erica C. Heinrich, Traci Marin, Cecilia Anza-Ramirez, Jeremy E. Orr, Dillon Gilbertson, Pamela N. DeYoung, Gustavo Vizcardo-Galindo, Rómulo Figueroa-Mujica, Francisco C. Villafuerte, Atul Malhotra, and Tatum S. Simonson. The effects of nocturnal hypoxemia on cognitive performance in andean highlanders. High Alt Med Biol. 26:347–354, 2025. Background: Many Andean highlanders exposed to chronic hypoxemia are susceptible to excessive erythrocytosis (EE) and chronic mountain sickness (CMS). Nocturnal hypoxemia is more marked than diurnal hypoxemia and includes sustained and intermittent components. The potential for cognitive impairments related to nocturnal hypoxemia in this population has not been extensively studied, but improved understanding may provide opportunities for the prevention of long-term effects of EE and CMS. Methods: To examine this relationship, 48 participants residing permanently at 4, 340 m completed an overnight sleep study and a battery of cognitive function tests that examined a broad range of cognitive domains. Results: Greater nocturnal hypoxemia was associated with longer reaction times on Balloon Analogue Risk Task (BART) (p < 0.01) and Emotion Recognition Test (ERT) (p < 0.01). Longer completion times of Trail Making Task were also associated with increased nocturnal hypoxemia (p = 0.03). Increased hematocrit was similarly associated with longer reaction times on the ERT (p = 0.01) and the BART (p = 0.01). Conclusion: Overall, our results showed that increased nocturnal hypoxemia and higher hematocrit were associated with impairments in cognitive performance in individuals residing permanently at high altitude.
KW - Andean Highlanders
KW - cognition
KW - high-altitude physiology
KW - nocturnal hypoxemia
KW - sleep-disordered breathing
UR - https://www.scopus.com/pages/publications/85211994194
U2 - 10.1089/ham.2024.0077
DO - 10.1089/ham.2024.0077
M3 - Artículo
C2 - 39658027
AN - SCOPUS:85211994194
SN - 1527-0297
VL - 26
SP - 347
EP - 354
JO - High Altitude Medicine and Biology
JF - High Altitude Medicine and Biology
IS - 4
ER -