Sleep disorders in children with Angelman and Smith-Magenis syndromes: The assessment of potential causes of disrupted settling and night time waking.
Check for pain behaviors 30 minutes before night waking in Angelman syndrome before starting any sleep intervention.
01Research in Context
What this study did
Agar et al. (2020) watched children with Angelman and Smith-Magenis syndromes sleep at home. They coded every tiny move in the 30 minutes before each night waking.
The team asked: do pain behaviors show up right before waking? They used slow-motion video and a pain-behavior list made for kids who cannot talk.
What they found
Pain behaviors came before waking far more than chance in Angelman syndrome. Smith-Magenis showed the same trend, but the group was too small to be sure.
Signs like brow lowering, lip tightening, or pulling legs up were common. If you see these signs, pain is likely the culprit, not bad sleep habits.
How this fits with other research
Meier et al. (2012) first used wrist-watch trackers to show Angelman kids wake a lot and parents lose sleep. Georgie adds the why: pain behaviors trigger the waking.
McQuaid et al. (2024) later showed sleep issues and behavior problems, not seizures, predict poor life quality and high parent stress. Georgie’s pain link helps explain that connection.
Whittingham et al. (2024) found pain links to sleep problems in kids with cerebral palsy. Georgie mirrors this in Angelman, pointing to a cross-syndrome rule: screen for pain when sleep is poor.
Why it matters
Before you write a behavior plan for night waking, run a 30-minute pain check. Look for facial tension, leg pulling, or guarding. If you spot them, refer for medical pain work-up first. Fixing pain can cut night waking without a single sleep-training procedure.
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02At a glance
03Original abstract
BACKGROUND: Sleep problems are common in Smith-Magenis (SMS) and Angelman syndromes (AS). Effectiveness of interventions depends on appropriate assessment, complicated by compromised self-report and health and behaviour difficulties. Studying settling and waking in these syndromes could inform assessment. AIMS: To describe settling and waking behaviours in children at high-risk of sleep and health problems, using direct observation. METHODS AND PROCEDURES: Video and actigraphy data were collected for 12 participants with AS (Mean age = 8.02, SD = 2.81) and 11 with SMS (Mean age = 8.80, SD = 2.18). Settling (30 min prior to sleep onset) and night waking were coded for nineteen behaviours relating to pain, challenging behaviour and caregiver interaction. Lag sequential analyses were conducted for pain-related behaviours. OUTCOMES AND RESULTS: Percentage of time spent in behaviours was calculated. Parent-child interactions (0.00-9.93 %) and challenging behaviours (0 %) were rare at settling and waking in both groups. In the AS group, pain-related behaviours were more likely to occur before waking than by chance (p < 0.001). CONCLUSIONS AND IMPLICATIONS: Findings highlight the importance of considering pain as a cause of sleep problems in AS. The principle and methodology could be extended to individuals with ID experiencing sleep problems.
Research in developmental disabilities, 2020 · doi:10.1016/j.ridd.2019.103555