Lecture Human anatomy and physiology - Chapter 10: The muscular system (part c)

The muscular system (part c). In this chapter, you will learn: Muscles crossing the shoulder joint, rotator cuff anatomy and function, movement at the glenohumeral joint, muscles crossing the elbow joint, muscles of the forearm, muscles of the forearm: anterior compartment, muscles of the forearm: posterior compartment,...and other contents.
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Lecture Human anatomy and physiology - Chapter 10: The muscular system (part c) PowerPoint® Lecture Slides prepared by Janice Meeking, Mount Royal College CHAPTER 10 The Muscular System: Part CCopyright © 2010 Pearson Education, Inc. Muscles Crossing the Shoulder Joint • Nine muscles cross the shoulder joint to insert on and move the humerusCopyright © 2010 Pearson Education, Inc. Muscles Crossing the Shoulder Joint • Some originate off the scapula; others originate off the axial skeleton • Three are prime movers of the arm • Pectoralis major • Latissimus dorsi • Deltoid • Actions include flexion, extension, adduction, abduction, and rotation of humerusCopyright © 2010 Pearson Education, Inc. Muscles Crossing the Shoulder Joint PLAY A&P Flix™: Pectoralis major PLAY A&P Flix™: Latissimus dorsi PLAY A&P Flix™: DeltoidCopyright © 2010 Pearson Education, Inc. Muscles Crossing the Shoulder Joint • Four muscles are rotator cuff muscles • Supraspinatus • Infraspinatus • Teres minor • Subscapularis • Reinforce the capsule of the shoulder • Act as synergists and fixators • Two additional muscles are synergists: coracobrachialis and teres majorCopyright © 2010 Pearson Education, Inc. Muscles Crossing the Shoulder Joint PLAY A&P Flix™: Muscles that cross the glenohumeral joint PLAY A&P Flix™: Movement from the rotator cuff muscles (a) PLAY A&P Flix™: Movement from the rotator cuff muscles (b) PLAY A&P Flix™: Teres MajorCopyright © 2010 Pearson Education, Inc. Rotator Cuff Anatomy and Function PLAY A&P Flix™: Subscapularis PLAY A&P Flix™: Supraspinatus PLAY A&P Flix™: Infraspinatus PLAY A&P Flix™: Teres minor PLAY A&P Flix™: Rotator cuff musclesCopyright © 2010 Pearson Education, Inc. Clavicle Deltoid Sternum Pectoralis major Coracobrachialis Triceps brachii: Lateral head Long head Medial head Biceps brachii Brachialis Brachioradialis (a) Anterior viewCopyright © 2010 Pearson Education, Inc. Figure 10.14a Rotator Cuff Anatomy and Function PLAY A&P Flix™: Scapular muscles of the glenohumeral joint (a) PLAY A&P Flix™: Axial muscles of the glenohumeral joint (a)Copyright © 2010 Pearson Education, Inc. Supraspinatus* Spine of scapula Deltoid (cut) Greater tubercle of humerus Infraspinatus* Teres minor* Teres major Triceps brachii: Lateral head Long head Latissimus dorsi Humerus ...