Final answer:
Theta waves are uncommon for awake adults but common for children. They are low-frequency brain waves typically present during stage 1 sleep.
Step-by-step explanation:
The brain waves that are uncommon for awake adults but common for children are theta waves. Theta waves are low-frequency (4-7 Hz) brain waves that are typically present during stage 1 sleep. They are associated with a relaxed but awake state.
In contrast, awake adults primarily exhibit beta waves, which have a higher frequency (13-30 Hz) and lower amplitude compared to theta waves. Beta waves are characteristic of wakefulness and show more variability in brain wave patterns.
Overall, the transition from theta waves to beta waves during sleep can provide insights into the different stages of sleep and the brain activity associated with each stage.
Learn more about brain waves