An alternating EEG pattern seen during quiet sleep in a newborn infant, consisting of both high and low-voltage activity is termed:

An alternating EEG pattern seen during quiet sleep in a newborn infant, consisting of both high and low-voltage activity is termed:

• A. Active sleep
• B. Trance alternant
• C. Sawtooth waves
• D. Slow-wave sleep

Answer: (B)

In newborns, quiet sleep can show a distinctive pattern called trance alternant, where the EEG cycles between bursts of higher-voltage activity and quieter, low-voltage periods. This alternating pattern is a normal feature of quiet sleep in the first months of life and helps distinguish it from other sleep states. Sawtooth waves, for example, are more typical of REM (active) sleep in infants, not this alternating quiet-sleep pattern. Slow-wave sleep would present with more continuous, high-amplitude delta activity rather than alternating bursts. The described alternating high- and low-voltage activity is what defines trance alternant.

In newborns, quiet sleep can show a distinctive pattern called trance alternant, where the EEG cycles between bursts of higher-voltage activity and quieter, low-voltage periods. This alternating pattern is a normal feature of quiet sleep in the first months of life and helps distinguish it from other sleep states. Sawtooth waves, for example, are more typical of REM (active) sleep in infants, not this alternating quiet-sleep pattern. Slow-wave sleep would present with more continuous, high-amplitude delta activity rather than alternating bursts. The described alternating high- and low-voltage activity is what defines trance alternant.