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

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

  1. PowerPoint® Lecture Slides prepared by Janice Meeking, Mount Royal College CHAPTER 10 The Muscular System: Part C Copyright © 2010 Pearson Education, Inc.
  2. Muscles Crossing the Shoulder Joint • Nine muscles cross the shoulder joint to insert on and move the humerus Copyright © 2010 Pearson Education, Inc.
  3. 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 humerus Copyright © 2010 Pearson Education, Inc.
  4. Muscles Crossing the Shoulder Joint PLAY A&P Flix™: Pectoralis major PLAY A&P Flix™: Latissimus dorsi PLAY A&P Flix™: Deltoid Copyright © 2010 Pearson Education, Inc.
  5. 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 major Copyright © 2010 Pearson Education, Inc.
  6. 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 Major Copyright © 2010 Pearson Education, Inc.
  7. 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 muscles Copyright © 2010 Pearson Education, Inc.
  8. Clavicle Deltoid Sternum Pectoralis major Coracobrachialis Triceps brachii: Lateral head Long head Medial head Biceps brachii Brachialis Brachioradialis (a) Anterior view Copyright © 2010 Pearson Education, Inc. Figure 10.14a
  9. 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.
  10. Supraspinatus* Spine of scapula Deltoid (cut) Greater tubercle of humerus Infraspinatus* Teres minor* Teres major Triceps brachii: Lateral head Long head Latissimus dorsi Humerus Olecranon process of ulna Anconeus (b) Posterior view * Rotator cuff muscles Copyright © 2010 Pearson Education, Inc. Figure 10.14b
  11. Rotator Cuff Anatomy and Function PLAY A&P Flix™: Scapular muscles of the glenohumeral joint (b) PLAY A&P Flix™: Axial muscles of the glenohumeral joint (b) Copyright © 2010 Pearson Education, Inc.
  12. Copyright © 2010 Pearson Education, Inc. Table 10.12 Part 1
  13. Movement at the Glenohumeral Joint PLAY A&P Flix™: Movement at the glenohumeral joint: An overview PLAY A&P Flix™: Movement at the glenohumeral joint (a) PLAY A&P Flix™: Movement at the glenohumeral joint (b) Copyright © 2010 Pearson Education, Inc.
  14. Muscles Crossing the Elbow Joint • Anterior flexor muscles • Brachialis and biceps brachii—chief forearm flexors • Brachioradialis—synergist and stabilizer PLAY A&P Flix™: The elbow joint and forearm: An overview PLAY A&P Flix™: Muscles of the elbow joint (a) Copyright © 2010 Pearson Education, Inc.
  15. Clavicle Deltoid Sternum Pectoralis major Coracobrachialis Triceps brachii: Lateral head Long head Medial head Biceps brachii Brachialis Brachioradialis (a) Anterior view Copyright © 2010 Pearson Education, Inc. Figure 10.14a
  16. Muscles Crossing the Elbow Joint PLAY A&P Flix™: Muscles of the elbow joint (b) PLAY A&P Flix™: Biceps brachii PLAY A&P Flix™: Brachialis PLAY A&P Flix™: Brachioradialis Copyright © 2010 Pearson Education, Inc.
  17. Muscles Crossing the Elbow Joint • Posterior extensor muscles • Triceps brachii—prime mover of forearm extension • Anconeus—weak synergist Copyright © 2010 Pearson Education, Inc.
  18. Supraspinatus* Spine of scapula Deltoid (cut) Greater tubercle of humerus Infraspinatus* Teres minor* Teres major Triceps brachii: Lateral head Long head Latissimus dorsi Humerus Olecranon process of ulna Anconeus (b) Posterior view * Rotator cuff muscles Copyright © 2010 Pearson Education, Inc. Figure 10.14b
  19. Muscles Crossing the Elbow Joint PLAY A&P Flix™: Muscles of the elbow joint (c) PLAY A&P Flix™: Triceps brachii Copyright © 2010 Pearson Education, Inc.
  20. Lateral head Triceps Long brachii head Medial Posterior head compartment of arm (extends Humerus elbow); innervation: Extensors Flexors radial nerve Others Brachialis Short head Biceps brachii Long head (a) (a) Muscles of the arm Anterior compartment of arm (flexes elbow); innervation: musculocutaneous nerve PLAY A&P Flix™: Movement at the elbow joint Copyright © 2010 Pearson Education, Inc. Figure 10.17a
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