"Many stroke survivors and people with aphasia are left with little or no speech. However, they are often able to sing, sometimes with the same fluency and clarity they had before the onset of illness. In 1973, researchers developed a therapy based on the fact that speech and singing are stored in different parts of the brain. We use the left side of the brain for speech and movement. Music uses large areas of the brain and ‘as patients learn to put their words to melodies, the crucial connections form on the right side of their brains."