: While focused on arms, it includes surrounding anatomy such as the pectorals and back to show how they interact with shoulder movements. Movement Range : Detailed analysis of dynamic actions like supination (palm up), (palm down), arm extension, and flexion. Sexual Dimorphism It visualizes the "Muscle Belly Shift
: Remembering that the hand is "90% bones," she used the palm’s three muscle groups as landmarks to ensure the fingers didn't just look like "floating sausages" but were anchored to a solid structure. arm and hand in motion by anatomy for sculptors pdf top