Patterned Sensory Enhancement is a technique which uses the rhythmic, melodic, harmonic and dynamic-acoustical elements of music to provide temporal, spatial and force cues for movements which reflect functional exercises and activities of daily living.
PSE is broader in application than RAS because it is (a) applied to movements that are not rhythmical by nature (e.g., most arm and hand movements, functional movement sequences such as dressing or sit-to-stand transfers) and (b) it provides more than just temporal cues. PSE uses musical patterns to assemble single, discrete motions (e.g., arm and hand movements during reaching and grasping), into functional movement patterns and sequences. PSE cues movements temporally, spatially, and dynamically during training exercises.
Source: Thaut, M. H. (2005). Rhythm, Music and the Brain. New York and London: Taylor and Francis Group.