An anonymous reader writes: Like the labyrinths to which they are frequently compared, metal songs create a prediction game within the brain and cause an explosion of neural activity in a part of the brain called the nucleus accumbens. This tiny wad of cells, which sits in the pleasure/reward center of the brain, gives us a throbbing blast of “reward” every time we play the guess-where-this-riff-goes game.
Both metal and classical play this game. They specialize in intense repetition of certain phrases, but unlike rock music, the repeated phrases do not necessarily lead to the same conclusions, and in fact alter their destinations and form throughout the work. This keeps the guessing game intense and, while we’re distracted with the riffology, shows a change in themes, which if themes are metaphorical, shows a learning process by whatever protagonist may be inferred from the work.