Obturator internus, externus, and quadratus femoris all look like they might be tension components in hip joint as tensegrity system, since they originate at a point lower than the attachment. Fits with the models people make where the thigh bone sticks up a long way from the pelvis, it does stick up a little bit, the greater trochanter. In quadrupeds the olecranon also sticks up quite a bit.
The serratus ventralis is an obvious tensegrity tension component in shoulder blade jointing onto rest of body. We don't have the cervical part anymore, it became our levator scapula that causes a lot of problems, lower attachments lost because no need to resist load on arm since we are bipedal (bipedal with tense cervical portion of serratus ventralis, mind you!).
I can see pectoral muscle + latissimus dorsi + rectus abdominis, and all their fascial attachments, being major tension components in tensegrity of the humerus and glenohumeral joint in quadrupeds, firmly attaching on either side of the flexor and extensor muscle compartment and into the intermuscular septa fascia on either side.
Or, do they all have origin and attachment in correct vector? (as a system they'd work together) It would explain the extremely firm origin of the lats, never really got that, evolutionarily.
