Final answer:
Referring someone to music therapy is often done to help with self-expression, Parkinson's Disease, or recovery from an Acquired Brain Injury, not to develop perfect pitch.
Step-by-step explanation:
A reason to refer someone to music therapy can encompass various needs, such as the necessity to facilitate self-expression, addressing conditions like Parkinson's Disease, or helping in the recovery of an Acquired Brain Injury. Music therapy is not typically used to develop perfect pitch, as this is more of a musical skill than a therapeutic goal. Music therapy might particularly benefit those with Parkinson's Disease, as it is known for causing balance and posture problems, repetitive motor behaviors, and difficulties with planning and executing tasks. In the case of an Acquired Brain Injury, music therapy can help in the rehabilitation process, aiding patients in relearning verbal and non-verbal communication skills and in regaining some cognitive functions. Facilitating self-expression through music therapy can also be greatly beneficial for those who have difficulties with social interactions or communication, such as individuals on the autism spectrum.