At what gestational age is the delta brush pattern typically observed?

The delta brush pattern is a specific type of EEG activity that is typically observed in the developing brain of preterm infants. This pattern is characterized by a combination of delta waves (low-frequency activity) interspersed with spindles or brush-like patterns. The presence of the delta brush pattern specifically indicates a maturation process in the cerebral cortex, which occurs as the brain develops further towards term.

At approximately 32 to 34 weeks of gestation, the presence of the delta brush pattern signifies that the neural connectivity and cortical development are advancing, making it a key indicator for assessing neurodevelopment in preterm infants. This gestational window is critical for ongoing brain development, where the pattern becomes more prominent and may eventually evolve into more mature EEG patterns as the infant approaches term.

Understanding the timing of this pattern's emergence helps clinicians monitor the neurological health of preterm infants and predict future neurodevelopmental outcomes. Recognizing the importance of gestational age makes it clear why the delta brush pattern is primarily associated with the 32 to 34 week range.