The West Side Tremble Clefs will perform noon Monday, Dec. 11, at the Arizona Traditions Community Center, 17221 N. Citrus Road.

Admission to the concert is free.

The Tremble Clefs are music therapy groups for people with Parkinson’s disease, their family members and caregivers with no musical experience expected or required.

Parkinson’s disease is a neurological disease that causes deterioration of muscles throughout the body including loss of voice.

The purpose of the Tremble Clefs is to intervene the voice loss by improving voice volume and speech through singing and focused exercise. This clinically beneficial program also generates new learning and comfortable challenges in a shared supportive environment.

Visit TrembleClefsArizona.org for additional information about the group and future concerts.

The site also includes practice locations, dates and times for those who may be interested in participation.