Music therapy is a broad field. Music therapists use music-based experiences to address client needs in one or more domains of human functioning: cognitive, academic, emotional/psychological; behavioral; communication; social; physiological (sensory, motor, pain, neurological and other physical systems), spiritual, aesthetics. Music experiences are strategically designed to utilize the elements of music for therapeutic effects, including melody, harmony, key, mode, meter, rhythm, pitch/range, duration, timbre, form, texture, and instrumentation.The therapy is predominantly led by the client, and is used to help the client to express their issues and problems when they may find it difficult to do so. The goal is to improve the client's communication and they mental health by attempting to find a way the client can adapt to the world around them and the challenges they may face. Such therapy is available through the NHS in the UK.