Which music therapy technique utilizes sound patterns to elicit functional movements?

Patterned Sensory Enhancement is the correct answer because it specifically focuses on using structured sound patterns to facilitate and enhance physical movement in individuals. This technique is designed to create a sensory experience where the music alters the individual's perception and reaction, thus promoting functional movement and improving motor skills. By utilizing rhythm, melody, and dynamics in a deliberate way, therapists can encourage movements that may be challenging for the client in everyday situations.

In contrast, Therapeutic Instrumental Music Performance primarily involves playing instruments to achieve therapeutic goals but does not specifically focus on movement facilitation through sound patterns. Rhythmic Auditory Stimulation utilizes rhythmic patterns to help with walking and gait but is a narrower application than the broader sensory approach of Patterned Sensory Enhancement. Music-Assisted Relaxation generally aims at reducing stress and anxiety through calming music, which does not directly engage with functional movements or physical motor skills in the same manner.

Thus, the unique focus of Patterned Sensory Enhancement on using a multifaceted approach to evoke movements through carefully crafted sound patterns solidifies it as the correct technique for this question.