Question

Brain waves common to a healthy sleeping person and a brain-damaged awake person are called
A. Alpha waves
B. Beta waves
C. Theta waves
D. Delta waves

Answer 1

Hint: Our brain processes all the signals that it receives from different body parts and within the brain. It controls all the activities of our body such as voluntary organs, involuntary organs, thermoregulation, hunger, thirst all are controlled by the brain. The rhythmic variation within the potential between different body parts of the brain are called brain waves. These brain waves are visible on electroencephalograms (EEG). EEG is a test which detects the electrical activity within the brain with the help of metal discs. Alpha, beta, theta and delta are different brain waves produced by our brain.

Complete Step by Step Answer:
Different brain waves are produced in different situations. For example,

Alpha waves are produced as a result of flowing thoughts, meditative thoughts, calmness, alertness etc. It has a range of 8 to 12 Hz.

Beta waves are produced during the normal state of consciousness such as while performing tasks. It is produced when we are engaged in problem-solving, decision-making, judgment or focused on a particular task. It ranges from 12 to 38 Hz.

Theta waves are produced when we are in sleep or in deep meditation. These waves are produced when we focus on the signals originating from the within and get withdrawn from the outer world. It ranges from 3 to 8 Hz.

Delta waves are slow but loud brain waves. These waves are common in sleeping people and brain awake people. It ranges from 0.5 to 3 Hz.

Therefore, the correct option is D.

Note: Our daily life experience greatly depends on these brain waves. If the brain waves produced are out of balance, it will cause many problems such as emotional and neuro-physical related problems.