Journal of Obesity & Weight Loss Therapy
Open Access

Abstract

Introduction: Children with sleep-disordered breathing (SDB) are at risk for memory problems due to drops in blood oxygen levels that often disrupt sleep. Little is known about the risk of memory deficits in the context of mild SDB. In the current study we explore the association between sleep variables, respiratory variables and neurobehavioral performance on a brief memory task in children with suspected SDB. Methods: Children aged between 7-17y suspected SDB who were scheduled for an overnight laboratory sleep study were recruited. Those with moderate-to-severe SDB were excluded. Children performed a brief (15 minute) computerized facial recognition memory task. Prior to bedtime, the child was instructed to study photos of unfamiliar faces. In the morning test session, the child�s task was to identify as accurately and quickly as possible the previously presented faces. Measured variables: 1) sleep and respiratory metrics; 2) memory performance: accuracy (number correct) and reaction time (RT, milliseconds). Results: Eighteen children (M=12.7y, SD=3.0) were included in the final study. Compared to children without SDB (apnea-hypopnea index, AHI <1/h), those with mild SDB (AHI >1-5/h) had a higher AHI (p<0.01), more respiratory-related arousals (p=0.02) and higher oxygen de-saturation indices (p<0.01). There were no group differences (mild SDB vs. no SDB) in sleep variables or memory performance (accuracy and RT). For both groups, there was greater accuracy in recognizing the faces compared to the foils (p<0.01). No differences were found in how fast the children responded when seeing the previously studied faces compared to foils seen for the first time. Conclusion: Our data suggest that accuracy and retention in brief tests of recognition memory do not differ between children with and without mild SDB. Future studies should determine whether more serious forms of SDB have an impact on recognition memory.

Biography

Email: mmograss@yahoo.com