" The right and left hemispheres of our brain show differences in their gross anatomy, many of which are also found in the brains of other animals. In humans, the left hemisphere generally makes a unique contribution to language and to the performance of complex movements. Consequently, damage on this side tends to be accompanied by aphasia (impairment of spoken or written language) and apraxia (impairment of coordinated movement). People usually show a right-ear (left-hemisphere) advantage for words, digits, nonsense syllables, Morse code, difficult rhythms, and the ordering of temporal information, whereas they show a left-ear (right-hemisphere) advantage for melodies, musical chords, environmental sounds, and tones of voice. "

― Sam Harris , Waking Up: A Guide to Spirituality Without Religion