Answer: Don displayed Theta Wave.
Explanation:
Let treat the concept "Brainwave Forms".
We'll recall that: The Brain is an organ that coordinates all nervous actions in the Central Nervous System of all vertebrates and some invertebrate animals.
Also, Wave can be defined as a disturbance (oscillation) that travels through a medium, transporting energy from one location to another.
Therefore, Brainwave is said to be formed by rhythmic electrical impulse/charge triggered by masses of neurones, thereby interacting with each other in the Central Nervous System.
It is useful to think of Brainwave form from a state of unconsciousness to being conscious. Like the frequency of wave, Brainwave is also measured in Hertz (Hz).
Here are the following types:
INFRA-LOW BRAINWAVE ( <0.5Hz)
INFRA-LOW brainwaves are slow in natural which makes them difficult to detect. Very few studies have been conducted about them.
DELTA BRAINWAVE ( 0.5Hz - 3Hz)
They are slow, loud resonating brainwaves generated in deepest level of meditation and dreamless sleep. Healing and regeneration of body tissues and cells also occurs in this stage.
THETA BRAINWAVE ( 3Hz-8Hz)
Theta Brainwave occurs in sleep. It is the passage to intuitive learning and memory. In THETA WAVE, we are in a dream, bright and clear imagination and information beyond our normal conscious awareness.
ALPHA WAVE ( 8Hz- 12Hz)
Alpha waves dominate during quietly flowing thoughts. They are also known for mental coordination, calmness and generating body alertness.
BETA WAVE ( 12Hz-38Hz)
Beta waves engage us in our day to day activities. They dominate our normal waking state of consciousness.