Many innovative therapy techniques have been developed to help the restoration of lost functions and to aid in prevention and treatment of depression. Music and art therapy has been used in rehabilitation settings to stimulate brain functions involved in movement, cognition, speech, emotions, and sensory perceptions. However many research studies on the use of music and art therapy in rehabilitation of acquired brain injury have suffered from small sample size, making it difficult to achieve statistically significant results. In addition, differences in factors such as study designs, methods of interventions, and intensity of treatment have led to varying results.