Question

When the person is alert with open eyes and actively trying to solve some problem, the ECG shows……………..waves?
A. Alpha.
B. Beta.
C. Delta.
D. Gamma.

Answer 1

Hint: Brainwaves are identified by the electrical patterns they make and their frequency. Each type indicates a different state such as dreamy state, relaxed state or active state. EEG is the electronic instrument to map the brainwaves in any organism. EEG records the brainwaves in bands that are delta, theta, alpha, beta, and gamma.

Complete answer:
Alpha wave runs between 8 to 12 hertz - Alpha brainwave occurs when the brain is in active thoughts process, but not in meditation. Alpha is called the resting state of the brain. Alpha wave helps in thought coordination, tranquillity, calmness, activeness, and mind or body alertness/learning.

Beta waves have frequency from 12 to 38 Hz - They are present in our general waking condition, when the mind is in the state of general consciousness. When we pay attention to doing any tasks. Beta is a present when anyone is in alert mode, attentive skills, in problem solving, decision-making, or deep mental activity.

Gamma waves run from 38 to 42 Hz frequency – They are the fastest of brain waves and process the different information from different brain areas. These types of waves pass information rapidly and quietly. For the gamma brainwaves generation, the mind has to be relaxed and quiet.

Delta waves have .5 to 3 Hz for frequency- They are the slowest but at the same time loudest brainwaves. When the brain is in deep meditation and is in dreamless sleepy condition, then delta waves get generated.

Hence, the correct answer is option (B).

Note: An electroencephalogram (EEG) is a test that records the electrical frequencies of the brain. Beta wave runs at the rate of frequency of 13 - 30 rounds per second. These waves generally exist, when a brain is in alert mode or with doses of medicine, like benzodiazepines.