Definitions of the various disciplines:
 
Art Therapy
Art Therapy is the therapeutic use of art making within a professional relationship, by people who experience illness, trauma, or challenges in living, and by people who seek personal development.  Through creating art and reflecting on the art products and processes, people can increase awareness of self and others, cope with symptoms, stress and traumatic experiences, enhance cognitive abilities and enjoy the life affirming pleasures of making art.
 
Music therapy
Music Therapy is the clinical and evidence-based use of music interventions to accomplish individualized goals within a therapeutic relationship by a credentialed professional who has completed an approved music therapy program.
 
Poetry Therapy
The terms poetry therapy, applied poetry facilitation, journal therapy, bibliotherapy, biblio/poetry therapy, and poetry/journal therapy reflect the interactive use of literature and/or writing to promote personal growth and emotional healing. In addition to poetry, poetry therapy applies all forms or written and spoken language including story, myth, folk and fairy tale and other genres of poetic expression as well as journal, memoir, and narrative. The poetry therapy process integrates discussion of published literature and reflective or creative writing for expression and communication of thoughts and feelings to facilitate participants' emotional well-being. The field of poetry therapy encompasses all of these modalities, though only a duly trained and licensed clinical practitioner can be credentialed as CPT or PTR. 
 
Dance Therapy
Dance/Movement therapy is the psychotherapeutic use of movement as a process which furthers the emotional, cognitive, social and physical integration of the individual.  Dance/Movement therapists work with individuals who have social, emotional, cognitive and/or physical problems.They are employed in psychiatric hospitals, clinics, day care, community mental health centers, developmental centers, correctional facilities, special schools and rehabilitation facilities. They work with people of all ages in both groups and individually. They act as consultants and engage in research.