Itis a physiological component of man's well being. All art forms are unique The two distinguishing characteristics of human development are society and a complex brain. These two characteristics are interactive and interdependent. The brain size makes possible communication and abstract thinking. The best arousal,according to Pribram, comes from variations on the familiar.
Extreme repetitiveness leads to internal inhibition and drowsiness.
If too much novelty is present the same result occurs,inhibition and a lack of attention. Although these findings are concerned chiefly with learning and habituation, they are applicable to music therapy. This neurological evidence points to the dulling effect of sensory deprivation or monotony. The same effect occurs when there is so much novelty that it can not be organized. Reaction to novelty seems to be a built in feature of the central nervous system.