Scapula: The scapula, or shoulder blades, should be down from the ears and drawn towards the front of the body to prevent a rounded upper back.
Most of the foxtrot is danced in "closed" frame, with the lead's left hand holding the follow's right, and the lead's right hand wrapped around the follow's back and resting on the scapula.
In FSH, surgical fixation of the scapula can help compensate for shoulder weakness.
Coracoid and scapula fused.
- Scapula, coracoid and clavicle, meet to form the foramen triosseum, through which passes the tendon of the supracoracoideus, or subclavius muscle to the tuberculum superius of the humerus.
The scapula is sabre-shaped, and extends backwards over the ribs, lying almost parallel to the vertebral column.
The scapula is long and slender, the supra-scapular border being rounded, and slowly and imperfectly ossified.
The scapula is usually narrow, with a long acromion; the clavicles may be altogether absent or imperfect, as in porcupines, cavies and hares, but in most species are well developed.
Scarcely anything is known of the sternum, and little of the shoulder-girdle, except the very stout furcula; scapula typically bird-like.
A diagnosis covering all the Ratitae (struthio, rhea, casuarius, dromaeus, apteryx and the allied fossils dinornis and aepyornis) would be as follows - (i) terrestrial birds without keel to the sternum, absolutely flightless; (ii) quadrate bone with a single proximal articulating knob; (iii) coracoid and scapula fused together and forming an open angle; (iv) normally without a pygostyle; (v) with an incisura ischiadica; (vi) rhamphotheca compound; (vii) without apteria or bare spaces in the plumage; (viii) with a complete copulatory organ, moved by skeletal muscles.