Anatomy by Planes
Complex Joints Motions
Sagittal plane.
Sagittal shoulder girdle, S13.
Acromioclavicular joint.
Sternoclavicular joint.
Scapulothoracic "joint."
10 - 15 degrees anterior tilt.
20 - 25 degrees posterior tilt.
Indirect Motion Reciprocal Relationships
C3 - T9.
None.
Sagittal rib cage, S12.
Sagittal shoulder girdle, S13. ←
Sagittal shoulder, S14.
Muscle Multi-Complex (it moves) Depth of Muscle
Anterior tilt.
Pectoralis minor.
Rib cage.
Shoulder girdle. ←
Level 2 (deep to skin and one layer of muscle).
Single-Complex Antagonists (1) Multi-Complex Synergists (0) Multi-Complex Antagonists (2)
None.
Rhomboids.
None.
Serratus anterior.
Trapezius (lower part, mostly).
Traditional Anatomy
Proximal attachments
The pectoralis minor connects to the medial surface of the coracoid process of the scapula.
Distal attachment
Distally the muscle connects with the third, fourth, and fifth ribs, close to their costal cartilage, their costochondral joints.
Location
It runs diagnoally from the outside inward, deep to the upper and middle parts of the pectoralis major.
Innervation
Medial pectoral nerve and by nerve fibers from roots C8 and T1.
Vascular Supply
Pectoral and deltoid branches of thoracic-aromial and superior and lateral thoracic arteries.
Motion
Elevation ribs.
Depression shoulder girdle.
Downward rotation shoulder girdle.
Protraction shoulder girdle.
