RESUMO
Epileptiform discharges captured on routine scalp EEG typically carry a surface negative dipole. We present a patient whose continuous EEG recording in the intensive care setting captured frequent electropositive non-convulsive seizures. Epileptiform discharges with positive polarity are common in the pediatric population but have rarely been reported in adult patients. When reported in adults, such patients usually have skull defects. As surface positive discharges are scarce, adult electroencephalographers should be prudent to differentiate such discharges from artifact, particularly in an intensive care setting where EEG artifact is common.
Assuntos
Ondas Encefálicas/fisiologia , Córtex Cerebral/fisiologia , Eletroencefalografia , Epilepsia Tônico-Clônica/fisiopatologia , Crânio/patologia , Estado Epiléptico/fisiopatologia , Idoso , Evolução Fatal , Feminino , Humanos , Unidades de Terapia IntensivaRESUMO
Evidence of spinal cord involvement in Powassan virus infection is largely limited to mouse models. We report a case of a polio-like illness caused by Powassan virus infection in a 62-year-old man in Canada. Magnetic resonance imaging showed T2 hyperintensities in the anterior horns of the cervical spinal cord.