This book is generally consisted from 2 main works and the general aim is to analyze the effects of audio-visual reaction perception and rhythmic perception in athletes and to understand musical perception in fetals. The first work is performed in the silent environment and the aim is analyzing athletes' right-left hand audio and visual reaction responses and understanding the relationship between audio and visual perception and rhythmic perception which is tested with a specific rhythm pattern. For the second work, prenatal learning is based on the brain based learning activity and some...