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Updated: Mar 31, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
A boy infant with sleep related rhythmic movement disorder showing arm banging
Jun Kohyama1, Tomoyuki Takano2
1Department of Pediatrics, Tokyo Bay Urayasu Ichikawa Medical Center, Toudaijima 3-4-32, Urayasu 279-0001, Chiba, Japan.
Insights
This case study presents a young boy with sleep-related rhythmic movement disorder characterized by nightly arm banging. The condition persisted from 7 months to 57 months of age, with limited response to clonazepam.
Area of Science:
- Neurology
- Sleep Medicine
- Pediatrics
Background:
- Sleep-related rhythmic movement disorder (SRRMD) encompasses repetitive, involuntary movements during sleep.
- Arm banging as a manifestation of SRRMD is rare, particularly in infants.
Observation:
- A male infant presented with daily arm banging on his face starting at 7 months of age.
- Video-electroencephalographic (EEG) recording at 23 months documented the persistent nocturnal behavior.
Findings:
- The patient exhibited continuous arm banging from 7 to 57 months of age, with no full remission.
- Clonazepam treatment showed minimal efficacy in reducing the intensity and frequency of the movements.
Implications:
- This case represents potentially the youngest documented instance of SRRMD with arm banging.
- The findings highlight the need for further research into the specific phenotype and management of arm banging SRRMD in pediatric populations.
Objective:
To present a male patient who performed arm banging on his face during sleep every night since 7 months of age.
Methods:
Clinical course of this patient with electroencephalographic recording with video recording at 23 months of age was shown.
Results:
His arm banging began at the age of 7 months and showed no complete remission at the age of 57 months of age, although clonazepam revealed mild effects on its intensity and frequency.
Discussion:
We diagnosed him as having arm banging type of sleep related rhythmic movement disorder. To our knowledge, no precise description on this type of sleep related rhythmic movement disorder has been found. In addition, this patient seemed to be the youngest case of sleep related rhythmic movement disorder showing arm banging.
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