Which EEG pattern is mostly associated with "wakefulness"?

The EEG pattern most commonly associated with wakefulness is fast beta waves. Beta waves are typically characterized by a frequency range of about 13 to 30 Hz and are predominant when a person is alert, engaged in problem-solving, or actively thinking. This activity reflects a state of high brain function associated with cognitive tasks and active concentration.

In the context of wakefulness, beta waves dominate the EEG pattern during activities requiring mental effort, leading to heightened alertness and focus. The presence of these fast beta waves indicates that the brain is actively processing information and interacting with the environment, which is a hallmark of the wakeful state.