Which of the following brain waves is typically associated with deep sleep?

Delta waves are indeed the brain waves typically associated with deep sleep. These waves are characterized by their low frequency (0.5 to 4 Hz) and high amplitude. During deep sleep, especially in stages 3 and 4 of non-REM sleep, delta waves dominate the brain's electrical activity. This state of deep sleep is critical for physical restoration, growth, and immune function, as well as the consolidation of memories.

Alpha and theta waves are more prevalent during lighter sleep stages and relaxation. Alpha waves are present when a person is awake but relaxed, and theta waves appear during light sleep and drowsiness. Beta waves, on the other hand, are associated with alertness, active thinking, and problem-solving activities. Thus, delta waves distinctly represent the brain activity that occurs during the most restorative phase of sleep.