Related Experiment Video
Updated: Aug 16, 2026

EEG Mu Rhythm in Typical and Atypical Development
Published on: April 9, 2014
Incomplete alpha coma pattern in a child
Rajesh RamachandranNair1, Shelly Karen Weiss
1Division of Neurology, The Hospital for Sick Children, University of Toronto, Toronto, Canada.
Insights
This study reports the first pediatric case of incomplete alpha coma, an electroencephalogram pattern indicating brain dysfunction. Despite reactivity, the child remained in a vegetative state, highlighting poor prognosis in children.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Clinical Electroencephalography
Background:
- Alpha coma pattern is a rare electroencephalogram (EEG) finding associated with severe brain injury.
- The definition of alpha coma has evolved to include reactivity to stimuli.
- In adults, incomplete alpha coma with reactivity has a better prognosis than the complete pattern.
Observation:
- A 5-year-old child presented with coma following hypoxic brain damage post-surgery.
- Electroencephalogram (EEG) revealed an incomplete alpha coma pattern, characterized by reactivity to painful stimuli.
- The child's clinical course remained a persistent vegetative state.
Findings:
- This case represents the first documented instance of an incomplete alpha coma pattern in a pediatric patient.
- The presence of reactivity in the EEG did not correlate with a positive neurological outcome in this child.
- The findings challenge the established prognostic significance of reactivity in pediatric alpha coma.
Implications:
- This case highlights the need for further research into the prognostic value of alpha coma patterns in pediatric populations.
- Understanding EEG patterns in pediatric coma is crucial for accurate diagnosis and management.
- The findings suggest that adult prognostic criteria for alpha coma may not directly translate to children.
Abstract:
Only 19 cases of alpha coma pattern in the pediatric age group had been reported. Recently the concept of reactivity has been included in the definition of alpha coma. Electroencephalography reveals reactivity to painful stimuli in incomplete alpha coma. In adults, this pattern has a better prognosis than the complete pattern with no reactivity. A 5-year-old child had coma secondary to hypoxic brain damage after surgery. His electroencephalogram documented an incomplete alpha coma pattern. He remained in a vegetative state. This study is the first report of a child with incomplete alpha pattern documented on electroencephalogram.
Related Concept Videos
Brain Waves
Acute Respiratory Failure-IV
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...
REM Sleep Behavior Disorder
RBD is significantly associated with...
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Acute Respiratory Failure-III

