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Journal of Child Neurology
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Single Photon Emission Computed Tomographic Evaluation of Brainstem Release Phenomenon and Seizure in Neonates

Israel Alfonso, MD

Department of Neurology Division of Neonatology University of Miami

Oscar Papazian, MD

Department of Neurology Division of Neonatal Neurology

Richard Litt, MD

Department of Radiology

Keith Meyer, MD

Department of Pediatrics Miami Children's Hospital Miami, Florida

Julio Paez, MD

Department of Pediatrics Miami Children's Hospital Miami, Florida

We report the ictal brain single photon emission computed tomographic (SPECT) findings in two neonates. One neonate had hypoxic-ischemic encephalopathy, a disorganized discontinuous electroencephalogram (EEG) background, lethargy, seizures, and brainstem release phenomena. A brain SPECT was performed during a brainstem release phenomenon characterized by a 34-second sustained tonic posture of the right arm and chewing. It did not reveal focal cerebral hemisphere hyperfusion. The second neonate had hemimegalencephaly, low-voltage irregular EEG background, and seizures. A brain SPECT was performed during a seizure characterized by a 32-second sustained tonic posture of the right arm. It revealed focal hyperperfusion in the posterior region of the left hemisphere. The brain SPECT findings in these patients indicate that despite clinically similar events, brainstem release phenomena and seizures have different perfusion characteristics, and refute the theory that brainstem release phenomena are due to epileptic foci in the cerebral hemispheres undetectable by EEG. (J Child Neurol 2000;15:56-58).

Journal of Child Neurology, Vol. 15, No. 1, 56-58 (2000)
DOI: 10.1177/088307380001500112
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