My impression is that a sense of rhythm, which has no analog in language, is unique and that its correlation with movement is unique to human beings. Why else would children start to dance when they're two or three? Chimpanzees don't dance.
Oliver SacksMusic, uniquely among the arts, is both completely abstract and profoundly emotional. It has no power to represent anything particular or external, but it has a unique power to express inner states or feelings. Music can pierce the heart directly; it needs no mediation.
Oliver Sacks