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Intermittent Hypoxia and Effects on Early Learning/Memory: Exploring the Hippocampal Cellular Effects of Pediatric
Arvind Chandrakantan1,2, Adam C Adler1,2, Mehmet Tohsun3
1From the Department of Anesthesiology, Baylor College of Medicine, Houston, Texas.
Insights
Pediatric obstructive sleep apnea (OSA) can cause lasting neurocognitive deficits, particularly in executive functions, even after surgery. Further research is needed to understand the persistent impact on the developing brain.
Area of Science:
- Neuroscience
- Pediatric Sleep Medicine
- Developmental Psychology
Background:
- Pediatric obstructive sleep apnea (OSA) is linked to neurocognitive impairments affecting memory, learning, and executive functions.
- Adenotonsillectomy (AT), the primary treatment, does not fully restore executive functions, suggesting potential long-term brain effects.
Purpose of the Study:
- To review the neurocognitive phenotype of pediatric OSA.
- To examine the impact of OSA on the hippocampus, a critical region for learning and memory.
- To highlight the need for preclinical models to investigate persistent neurocognitive dysfunction.
Main Methods:
- Review of existing clinical and research literature on pediatric OSA and neurocognition.
- Focus on studies examining the hippocampus and its cellular development in the context of OSA.
- Discussion of potential mechanisms underlying persistent neurocognitive deficits.
Main Results:
- Pediatric OSA is associated with significant neurocognitive deficits.
- Executive function deficits often persist post-adenotonsillectomy.
- The hippocampus is a key area of concern due to its role in learning/memory and ongoing neurogenesis.
Conclusions:
- Pediatric OSA may cause irreversible brain damage affecting neurodevelopment.
- Persistent neurocognitive dysfunction warrants further investigation, particularly concerning the hippocampus.
- Preclinical models are essential for elucidating the pathogenesis of these deficits.
Abstract:
This review provides an update on the neurocognitive phenotype of pediatric obstructive sleep apnea (OSA). Pediatric OSA is associated with neurocognitive deficits involving memory, learning, and executive functioning. Adenotonsillectomy (AT) is presently accepted as the first-line surgical treatment for pediatric OSA, but the executive function deficits do not resolve postsurgery, and the timeline for recovery remains unknown. This finding suggests that pediatric OSA potentially causes irreversible damage to multiple areas of the brain. The focus of this review is the hippocampus, 1 of the 2 major sites of postnatal neurogenesis, where new neurons are formed and integrated into existing circuitry and the mammalian center of learning/memory functions. Here, we review the clinical phenotype of pediatric OSA, and then discuss existing studies of OSA on different cell types in the hippocampus during critical periods of development. This will set the stage for future study using preclinical models to understand the pathogenesis of persistent neurocognitive dysfunction in pediatric OSA.
