Lecture 11 Outline of Last Lecture I. Levator Scapulae II. Rhomboids III. Serratus Anterior IV. Pectoralis Minor V. Subclavius VI. Bones VII. Skeletal Structures (Posterior) VIII. Skeletal Structures (Anterior) IX. Glenohumeral Joint X. Glenohumeral Joint Movements XI. Glenoid Labrum XII. Shoulder Bursae XIII. Glenohumeral Joint Ligaments XIV. Rotator Cuff XV. Muscles Outline of Current Lecture I. Supraspinatus II. Infraspinatus III. Teres Minor HPER 205 1st Edition These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best !used as a supplement to your own notes, not as a substitute. !IV. Subscapularis V. Deltoid VI. Pectoralis Major VII. Latissimus Dorsi VIII. Teres Major IX. Coracobrachialis X. Other muscles of Brachium XI. Glenohumeral Flexion XII. Glenohumeral Extension XIII. Glenohumeral Adduction XIV. Glenohumeral Internal and External Obliques XV. Glenohumeral Horizontal Abduction XVI. Glenohumeral Horizontal Adduction Current Lecture K. Supraspinatus 1. Origin: supraspinous fossa 2. Insertion: head of humerus 3. Actions: a. Abduction b. Pulls the head of humerus inward L. Infraspinatus 1. Origin: infraspinous fossa 2. Insertion: head of humerus 3. Actions: a. External rotationb. Pulls the head of humerus inward M. Teres Minor 1. Origin: lower posterior scapula 2. Insertion: head of humerus 3. Actions: a. External rotation b. Pulls the head of humerus inward N. Subscapularis 1. Origin: subscapular fossa 2. Insertion: head of humerus 3. Actions: a. Internal rotation b. Pulls head of humerus inward O. Deltoid 1. Origin: clavicle, acromion process, spine of scapula 2. Insertion: deltoid tuberosity 3. Actions: a. Anterior: abduction, flexion, horizontal adduction, and internal rotation b. Middle: abduction c. Posterior: abduction, extension, horizontal abduction, and external rotation P. P e c t o r a l i s M a j o r 1. Origin: clavicle, sternum, and ribs 2. Insertion: greater tubercle of humerus 3. Actions: a. Adductionb. Horizontal adduction c. Internal rotation d. Upper fibers - flexion to 60 degrees, abduction after 90 degrees e. Lower fibers - extension from flexed position to anatomical position Q. Latissimus Dorsi 1. Origin: ilium, sacrum, lumbar and thoracic spinous processes 2. Insertion: medial intertubercular groove 3. Actions: a. Extension b. Adduction c. Horizontal abduction d. Internal rotation R. Teres Major 1. Origin: scapula 2. Insertion: medial intertubercular groove 3. Actions: a. Extension b. Adduction c. Internal rotation S. Coracobrachialis 1. Origin: coracoid process 2. Insertion: humeral shaft 3. Actions: a. Flexion b. Adduction c. Horizontal adductionT. O t h e r M u s c l e s o f B r a c h i u m 1. Biceps brachii a. assist in flexion 2. Long head of triceps brachia a. assists in extension, adduction, and horizontal abduction U. Glenohumeral Flexion 1. Agonists a. Anterior deltoid, Upper pec, coracobrachialis V. Glenohumeral Extension 1. Agonists a. Lats, T Major, posterior deltoid, lower pec W. Glenohumeral Adduction 1. Agonists a. Lats, T major, lower pecs X. Glenohumeral Internal and External Rotation 1. Agonists a. Lats, T major, pecs major, subscapularis 2. Agonists a. Infraspinatus, T minor Y. G l e n o h u m e r a l H o r i z o n t a l A b d u c t i o n 1. Agonists a. Mid/posterior deltoid, infraspinatus, T minor Z. Glenohumeral Horizontal Adduction 1. Agonists a. Pecs major, anterior deltoid,