Which of the following are the three main types of brain waves recorded in EEG?

The three main types of brain waves recorded in an EEG that are most commonly referenced are alpha, beta, and delta waves. Each of these waves corresponds to different states of brain activity:

• Alpha waves are typically associated with relaxed, calm states and are most prominent when a person is awake but in a resting state, often with closed eyes. They usually have a frequency ranging from 8 to 12 Hz.

• Beta waves indicate alertness and active thinking, generally occurring when one is awake and engaged in mental tasks. They have a higher frequency, typically between 12 and 30 Hz.

• Delta waves, on the other hand, are the slowest brain waves, with a frequency of 0.5 to 4 Hz, and are associated with deep sleep and restorative processes in the brain.

Together, these three types of brain waves capture a range of cognitive processes and states of consciousness, making them fundamental to understanding EEG recordings and brain health.