Joint movements, muscle origin/insertion/action facts most relevant to physical therapy practice.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- Deltoid - origin
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Lateral third of clavicle, acromion, spine of scapula- Deltoid - insertion
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Deltoid tuberosity on lateral humerus- Deltoid - primary action
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Abduction of shoulder, anterior portion assists flexion, posterior portion assists extension- Supraspinatus - origin and insertion
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Origin: supraspinous fossa of scapula. Insertion: superior facet of greater tubercle of humerus- Supraspinatus - primary action
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Initiation of shoulder abduction (first 15 degrees)- Infraspinatus - origin and insertion
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Origin: infraspinous fossa of scapula. Insertion: middle facet of greater tubercle of humerus- Infraspinatus - primary action
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External (lateral) rotation of shoulder- Teres major - origin and insertion
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Origin: dorsal surface of scapula near inferior angle. Insertion: medial lip of intertubercular groove of humerus- Teres major - primary actions
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Extension, adduction, and internal rotation of shoulder- Pectoralis major - origin
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Medial clavicle, sternum, costal cartilages 1-6, and fascia of rectus abdominis- Pectoralis major - insertion
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Lateral lip of intertubercular groove of humerus- Pectoralis major - primary actions
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Flexion and internal rotation of shoulder, adduction across chest- Latissimus dorsi - origin and insertion
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Origin: spinous processes T6-S4, iliac crest, ribs 9-12. Insertion: floor of the intertubercular (bicipital) groove of humerus- Latissimus dorsi - primary actions
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Extension, adduction, and internal rotation of shoulder- Biceps brachii - origin and insertion
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Origin: short head from coracoid process, long head from supraglenoid tubercle of scapula. Insertion: radial tuberosity and bicipital aponeurosis
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