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Exploring Parakinesia Brachialis Oscitans: An Intriguing Post-Stroke Phenomenon
Danah AlJaafari1, Erum Shariff2
1Department of Neurology, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia. ORCID: http://orcid.org/0000-0003-0122-7875.
Clinical Medicine & Research
|July 8, 2026
Summary
Parakinesia Brachialis Oscitans (PBO) is a rare post-stroke condition where yawning triggers involuntary limb movements. This case highlights PBO
Area of Science:
- Neurology
- Neurorehabilitation
Background:
- Parakinesia Brachialis Oscitans (PBO) is a rare post-stroke phenomenon.
- It involves involuntary limb movements triggered by yawning in a paralyzed limb.
Purpose of the Study:
- To present a case of PBO following a pontine infarction.
- To discuss the diagnostic criteria and pathophysiology of PBO.
Main Methods:
- Case report of a 57-year-old male patient with stroke.
- Clinical observation of involuntary limb elevation during yawning.
- Brain MRI to identify infarction location.
Main Results:
- Patient diagnosed with PBO after developing involuntary arm and leg elevation upon yawning.
- MRI confirmed a left pontine infarction.
- Movement pattern consistent with typical PBO presentation.
Conclusions:
- PBO results from disrupted cortical inhibition of the cerebellum.
- Distinguishing PBO from seizures is crucial for accurate stroke management.
- Early identification of PBO aids in appropriate patient care and prevents unnecessary investigations.
Keywords:
Involuntary movementsIschemic strokeParakinesia brachialis oscitanceProprioceptive loopYawning
