Anterior: flexion, horizontal adduction, medial rotation of humerus
Middle: abduction of humerus to 90 degrees
Posterior: extension horizontal abduction, lateral rotation of humerus
3, 4, 5 ribs
Medial and upper surface of coracoid process of scapula
Elevates ribs if scapula fixed, protracts scapula (assists serratus anterior)
Medial third superior nuchal line, ligament nuchae, spinous processes and supraspinous ligaments to T12
Upper fibers to lateral third of posterior border of clavicle; lower to medial acromion and superior lip of spine of scapula to deltoid tubercle
laterally rotates, elevates and retracts scapula. If scapula is fixed, extends and laterally flexes neck
Spine T7, spinous processes and supraspinous ligaments of all lower thoracic, lumbar and sacral vertebrae, lumbar fascia, posterior third iliac crest, last four ribs (interdigitating with external oblique abdominis) and inferior angle of scapula
Floor of bicipital groove of humerus after spiraling around teres major
Extends, adducts and medially rotates arm. Costal attachment helps with deep inspiration and forced expiration
The lungs are located anterior to the diaphragm.
The diaphragm is the means by which the lungs inflate and deflate.