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Muscles
Scapular/Shoulder Joint Muscles
| Question | Answer |
|---|---|
| Upper Trapezium | O: Occipital bone I: Acromion process A: Scapula elevation |
| Middle Trapezium | O: Spinal process C7-T3 I: Scapular spine A: Scapular retraction |
| Lower Trapezium | O: Spinal process between middle and lower thoracic vertebra I: base of the scapular spine A: Scapular depression |
| Serratus Anterior | O: 1st 8 ribs I: Anterior surface of vertebral boarder of scapula A: Protraction |
| Levator Scapulae | O: First 4 vertebraes I: Vertebral boarder of scapula A: Elevation (same as upper Trapezium) |
| Rhomboid | O: Spinal process C7-T5 I: Vertebral boarder of scapula A: Retraction |
| Pectoralis Minor | O: 3-5 ribs I: Coracoid process of the scapula A: Scapula depression |
| Anterior Deltoid | O: 1/3 lateral clavicle I: Deltoid tuberosity A: Shoulder flexion |
| Middle Deltoid | O: Acromion process I: Deltioid tuberosity A: Shoulder abduction |
| Posterior Deltoid | O: Spine of the scapula I: Deltoid tuberosity A: Shoudler extension |
| Infraspinatus | O: Infraspinatus fossa of the scapula I: Great tubercle of the humerus A: Shoulder external rotation |
| Supraspinatus | O: Supraspinatus ossa of the scapula I: Greater tubercle of the humerus A: Shoulder abduction |
| Teres Major | O: Axiallary boarder of the scapula I: Lesser tubercle of the humerus A: Shoulder internal rotation/shoulder extension/ adduction |
| Teres Minor | O: Axillary boarder of the scapula I: Greater tubercle of the humerus A: Shoulder external rotation |
| Subscpaularius | O: Subscapularis fossa of the scapula I: Lesser tubercle of the humerus A: Shoulder internal rotation |
| Pectoralis Major (clavicular portion) | O:Medial half of clavicle I: Lateral biciptal groove of the humerus A: Shoulder flexion |
| Pectoralis Major (sternal) | O: Sternum I: Lateral Biciptal groove of the humerus A: Shoulder extension |