Delta brushes are typically seen in which type of patients?

Delta brushes are a distinctive electroencephalographic (EEG) pattern predominantly observed in premature infants, particularly in those who are underdeveloped or born very early, often during the neonatal period. This unique waveform consists of a combination of delta waves accompanied by a fast activity that looks like a "brush."

The presence of delta brushes is indicative of the brain's maturation process that occurs as neonates transition to full-term infants. This pattern highlights the neural activity related to the developing central nervous system and serves as a marker for gestational age. Typically, delta brushes are recognized in the EEG recordings of infants less than 37 weeks gestation and are often absent in older infants and adults, making them a specific finding in this demographic.