Related Experiment Video
Updated: Jun 27, 2026

Cerebral Ischemic Coma Model Induced by Modified Four-Vessel Occlusion
Published on: July 5, 2024
Alpha coma pattern in a child
J A Bragatti1, A M Mattos, H Bastes
1EEG Unit, Division of Neurology, Porto Alegre Clinical Hospital, Porto Alegre, Brazil. jbragatti@hcpa.ufrgs.br
Insights
Alpha coma, an EEG pattern, can occur in children with neuroblastoma due to septic encephalopathy. This pattern resolved with successful sepsis treatment, indicating a variable prognosis.
Area of Science:
- Neurophysiology
- Pediatric Neurology
- Critical Care Medicine
Background:
- Alpha coma, characterized by widespread alpha frequency EEG activity, is associated with severe neurological conditions.
- Common causes include hypoxic-ischemic encephalopathy, encephalitis, trauma, metabolic disorders, and drug overdose.
- While reported in children, its clinical significance is etiology-dependent.
Observation:
- This case report details alpha coma in a child with neuroblastoma.
- The electroencephalogram (EEG) pattern emerged during treatment due to complicating septic encephalopathy.
- The alpha coma pattern was transient, observed during the sepsis complication.
Findings:
- The alpha coma pattern resolved and was replaced by a normal EEG trace.
- Resolution of the alpha coma pattern correlated with successful sepsis treatment.
- This suggests a potentially reversible cause of alpha coma in this pediatric case.
Implications:
- The findings highlight the importance of considering treatable conditions like sepsis in pediatric alpha coma.
- This case underscores the variable prognosis of alpha coma, emphasizing the role of underlying etiology.
- It suggests that prompt management of underlying causes can lead to favorable neurological outcomes in children with alpha coma.
Abstract:
Alpha coma, an EEG pattern characterized by diffuse or widespread rhythmic activity in the alpha frequency band, is typically recorded in patients with profound coma and is frequently associated with severe neurological conditions. The most common etiologic factors of this pattern are hypoxic-ischemic encephalopathy, encephalitis, head trauma, metabolic disorders, and drug overdose. Reports of alpha coma pattern in children are relatively common. Clinical significance, both in children and adults, is variable, and highly dependent on etiology. The objective of this article is to report a clinical case of alpha coma pattern in a child with neuroblastoma. The EEG pattern was recorded during the evolution of treatment, secondary to complicating septic encephalopathy. The alpha coma pattern was replaced by a normal trace following a favorable outcome after sepsis resolution.
Related Concept Videos
Acute Respiratory Failure-IV
Acute Respiratory Failure-III
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Cardiopulmonary Resuscitation I: Adult

