The biologists and the life scientists have defined two types of nerves. They are the principal nerves and the arterial nerves. The principal nerves stretch from the neck to all vital organs. The arterial nerves spread from the main nerves to all parts of the body. The secondary nerves are connected to outward parts of the body and convey the messages to the brain. When the veins enlarge the blood pressures decreases. Due to the shriveling of blood vessels, the blood pressure increases. When the blood pressure varies at different parts of the body, it affects the health.
When the secondary nerves work, they produce heat whereas the functioning of the central nerves produces the opposite effect. That is due to these nerves, feelings of sloth, sleep, thoughtlessness, forgetfulness, grief and sorrow, fainting, unconsciousness and even death occurs. Obviously, when music could affect the various nerves, it would give rise to various maladies. Mental diseases as well as physical ailments will be caused. The mental effect would destroy his reasoning capacity. It is for this reason that one who listens to music is unable to perform the work that could be accomplished by a sane person.
Music creates vibration in the body and this is conveyed to all the parts of the body through the nervous system. As a result of it, indigestion occurs. Music affects the heart in such a way that the heartbeats become irregular. The blood pressure goes awry. All such ailments make a person permanently ill.
Consequently, even the modern medical science, in spite of its astonishing progress, fails in such a situation. Sometimes, the music is so intense that the listener loses his sanity. He becomes dumb and various kinds of mental diseases occur. In places, where music is more prevalent, we find that there are more neurotic illnesses.
Source: Imamreza.net