The MJAG (Muscle Joint Action Guide) is a hand-held, quick anatomy reference tool for joint-specific movements, muscle groups, and innervation. Choose from 26 different movements, both upper and lower extremity. You'll instantly see each movement's activated muscle groups, spinal segment, and innervation. Perfect anatomy study and review tool for Physical Therapy, Occupational Therapy, Athletic Training, Exercise Science, Kinesiology & Rehab. No more searching for which muscle group, spinal segment, or nerve activates a certain joint movement. This easy reference tool tells you everything you need to know, instantly. Order for yourself, colleagues, or class!