Origin Insertion action 1
About this set
Created by:
ceccorp on April 27, 2010
Subjects:
Classes:
Anatomy, Medical Terminology Brown-Mackie College Albuquerque, NM 2013, Anatomy, Packer PMR-Ortho, Anatomy and Physiology I Professor Cohen, Anatomy and Physiology (see more)
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10 terms
Terms | Definitions |
|---|---|
 infraspinatus |  infraspinous fossa, greater tubercle of the humerus, lateral rotation of humerus |
| supraspinatus |  supraspinous fossa of scapula, greater tubercle of the humerus, abducts and stabilizes humerus |
| Teres major |  dorsum of the inferior angle of scapula, crest of lesser tubercle of humerus, adducts arm, medially rotates arm, assists in arm extension |
| Subscapularis |  Origin: subscapular fossa Insertion: lesser tubercle of humerus Action: medial rotation of the humerus stabilizes the glenohumeral joint |
| Deltoid |  clavicle + scapular spine/deltoid, tuberosity of humerus, Action: abducts arm flexion and medial rotation (anterior portion) extension and lateral rotation (posterior portion) |
| Teres minor |  scapula/intertubular groove of humerus, adducts arm, originates on lateral border of scapula, inserts on greater tubercle of humerus, laterally rotates humerus |
| Latissimus dorsi |  Origin: spinous process of T7-L5 upper 2-3 sacral segments iliac crest lower 3 or 4 Ribs Insertion: lateral lip of the intertubercular groove Action: adduction of humerus medial rotation of the humerus extension from flexed position downward rotation of the scapula |
| Pectoralis major |  Origin: medial 1/3 of clavicle anterior aspect of manubrium & length of body of sternum cartilaginous attachments of upper 6 ribs external oblique's aponeurosis Insertion: lateral lip of bicipital groove to the crest of the greater tubercle clavicular fibers insert more distally; sternal fibers more proximally Action: adducts humerus medially rotates humerus flexion of the arm from extension (clavicular portion) |
| Pectoralis minor |  ribs #3-5 /coracoid of scapula, moves scapula anteriorly, elevates rib cage |
| Serratus anterior |  Origin: fleshy slips from the outer surface of upper 8 or 9 ribs Insertion: costal aspect of medial margin of the scapula Action: protract scapula stabilize scapula assists in upward rotation |
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