Standard references fail to show the "interosseous membrane" effect. When you twist a doorknob, the ulna stays static while the radius crosses over it. The exclusive PDF reveals:
The hand has 27 bones and 35 muscles, but you don't memorize that. The exclusive approach uses Form Principle #4: The Hand in Gripping Motion. It breaks down:
The hand is not a claw; it is a dynamic tripod that changes configuration every second. Standard references fail to show the "interosseous membrane"
The Three Arches of the Hand (Most sculptors forget these):
Motion Principle: When the wrist extends back (dorsiflexion), the fingers automatically want to curl (tenodesis action). When the wrist flexes forward, the fingers extend. This is passive tension. A figure with a hyper-extended wrist and straight fingers is biomechanically screaming. When the palm faces up (Supination): Purchase the
Most sculptors memorize the two bones of the forearm: Radius (thumb side) and Ulna (pinky side). But motion happens because the radius moves around the ulna.
When the palm faces down (Pronation):
When the palm faces up (Supination):
Purchase the complete hardcover set. Many retailers include a digital download code for a supplementary PDF focusing exclusively on limb dynamics. This is the closest you will get to the "exclusive" file. Standard references fail to show the "interosseous membrane"