Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

The correct answer is that the three stages of sleep in infants are identified as active sleep, indeterminate sleep, and quiet sleep. This classification highlights the unique stages of sleep that infants experience, which differ from the sleep architecture typically seen in adults.

Infants spend a considerable amount of time in active sleep, which is associated with rapid eye movement (REM) and is crucial for brain development. During this stage, the child's limbs may twitch, and they may exhibit facial movements. Indeterminate sleep refers to periods that are not easily classified into quiet or active stages; it can occur in transitions between remaining asleep and waking. Finally, quiet sleep, which is similar to deep sleep in adults, is characterized by the absence of movement and a more restful state where the infant is less likely to be disturbed.

Understanding these specific stages is vital for monitoring infant sleep patterns, which can indicate healthy development and inform parents on sleep practices.