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Published on: December 6, 2016
Subcortical arousal response in child patients with obstructive sleep apnea
Jun Kohyama1, Takeshi Hasegawa
1Department of Pediatrics, Tokyo Medical and Dental University, 1-5-45 Yushima, Tokyo 113-8519, Japan. jkohyama.ped@tmd.ac.jp
Insights
Subcortical arousal responses (SCAs) are elevated in children with obstructive sleep apnea syndrome (OSAS). Treatment significantly reduces SCA short and intermediate types, indicating their utility in assessing subcortical involvement.
Area of Science:
- Pediatric Pulmonology
- Sleep Medicine
- Neurology
Background:
- Obstructive sleep apnea syndrome (OSAS) is prevalent in children.
- Subcortical arousal responses (SCAs) are poorly understood in pediatric OSAS.
- A novel index, SCA, involving sighs and elevated chin muscle activity, was developed.
Purpose of the Study:
- To assess subcortical arousal response (SCA) in children with OSAS.
- To evaluate the impact of adenotonsillectomy on SCA.
- To compare SCA incidence in OSAS patients and controls.
Main Methods:
- Defined SCA as a sigh with elevated chin muscle activity.
- Classified SCAs into short (1-3s), intermediate (3-10s), and long (>10s) durations.
- Scored SCAs in 6 child OSAS patients (aged 2-5) before and after adenotonsillectomy, and in 4 controls.
Main Results:
- Pre-treatment, 45.5% of SCAs were linked to electroencephalographic arousals.
- SCA short and intermediate significantly decreased post-treatment, reaching control levels.
- SCA long showed no consistent post-treatment changes. SCA incidence exceeded previously reported arousal levels.
Conclusions:
- SCAs, particularly short and intermediate types, are sensitive indicators of subcortical involvement in pediatric OSAS.
- SCA provides a valuable metric for assessing treatment response in child OSAS patients.
- The high incidence of SCAs suggests a significant subcortical component in pediatric OSAS.
Objective:
The objective of this study is to assess subcortical arousal response (SCA) in child patients with obstructive sleep apnea syndrome (OSAS).
Methods:
A new index termed SCA was defined as a sigh associated with elevated chin muscle activity. According to the duration, SCAs were divided into three types; SCA short (1s or more and less than 3s), SCA intermediate (3s or more and less than 10s), and SCA long (10s or more). We scored SCAs in six child OSAS patients, aged 2-5 years, before and after adenotonsillectomy. SCAs were also counted in four age-matched controls.
Results:
In the pretreatment records, 45.5% of SCAs were associated with electroencephalographic arousals. In all patients, SCA short and SCA intermediate decreased after the treatment to the levels in the controls. SCA long exhibited no consistent changes after treatment. The incidence of SCAs was much higher than arousals previously reported in child OSAS patients as well as in normal children.
Conclusions:
SCAs, especially SCA short and SCA intermediate, are sensitive and useful indices for assessing subcortical involvement in child OSAS patients.
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