During which phase is a neonate most likely to exhibit delta brushes?

A neonate is most likely to exhibit delta brushes during quiet sleep. During this phase, the electroencephalogram (EEG) shows a pattern characterized by bursts of delta activity intermixed with faster waves, creating the appearance of "brushes" on the EEG. These delta brushes represent a unique form of brain activity that is observed predominantly in infants, particularly during the state of quiet sleep. This phase is important for brain development, and these patterns reflect neuronal activity related to the maturation of the brain and sensorimotor systems.

Recognizing these patterns can help in differentiating between different sleep states in neonates, as well as understanding their neurodevelopmental progress. In contrast, other sleep phases or wake states do not typically produce this specific EEG pattern, making it essential for clinical evaluation and research in neonatal brain function and health.