There are numerous branches of body psychotherapy, often tracing their origins to particular individuals: for example, 'Bioenergetic analysis' to the work of Lowen and Pierrakos; 'Radix' to the work of Chuck Kelley; Organismic Psychotherapy to the work of Malcolm and Katherine Brown; 'Biosynthesis' to the work of David Boadella; 'Biodynamic Psychology' to that of Gerda Boyesen; 'Rubenfeld Synergy' to Ilana Rubenfeld's work; 'Body-Mind Centering' to Bonnie Bainbridge Cohen's work, and 'Body-mind Psychotherapy' to Susan Aposhyan; the development of Jack Painter's 'Postural and Energetic Integration' into a psychotherapeutic modality.