Given her deafness, the auditory part of the brain, deprived of its usual input, had started to generate a spontaneous activity of its own, and this took the form of musical hallucinations, mostly musical memories from her earlier life. The brain needed to stay incessantly active, and if it was not getting its usual stimulation..., it would create its own stimulation in the form of hallucinations.

Music, 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.

Perception is never purely in the present - it has to draw on experience of the past;(...).We all have detailed memories of how things have previously looked and sounded, and these memories are recalled and admixed with every new perception.

Anatomists today would be hard put to identify the brain of a visual artist, a writer or a mathematician - but they would recognize the brain of a professional musician without moment's hesitation.

Ucho w liczbach:" A youthful ear can hear ten octaves of sound, spanning a range from about thirty to twelve tousand vibrations a second. The avarege ear can distinguish sounds a seventeenth of a tone apart. From top to bottom we hear about fourtheen tousend discriminable tones.