Ch 10 and 11 part 2
- 1. © 2015 Pearson Education, Inc. Muscles That Move the Arm
- 2. © 2015 Pearson Education, Inc. A&P Flix: Latissimus Dorsi
- 3. © 2015 Pearson Education, Inc. A&P Flix: Pectoralis Major
- 4. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Forearm and Hand • Most of these muscles originate on the humerus and insert on the forearm and wrist • Exceptions include: • Long head of triceps brachii: originates on the scapula and inserts on the olecranon • Long head of biceps brachii: originates on the scapula and inserts of the radial tuberosity of the radius
- 5. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Forearm and Hand • Anterior view • Muscles that move the forearm • Biceps brachii • Flexes at the elbow and shoulder • Brachialis • Flexes at the elbow • Brachioradialis • Flexes at the elbow
- 6. © 2015 Pearson Education, Inc. Figure 11.8b Muscles That Move the Forearm and Hand, Part I Coracoid process of scapula Humerus Coracobrachialis Triceps brachii, long head Triceps brachii, medial head Pronator teres Medial epicondyle of humerus FLEXORS AT THE ELBOW Biceps brachii, long head Biceps brachii, short head Brachialis Brachioradialis FLEXORS AT THE WRIST Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Palmar carpal ligament Flexor retinaculum Muscles That Move the Hand Muscles That Move the Forearm Superficial muscles of the right upper limb, anterior view b
- 7. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Forearm and Hand • Anterior view • Muscles that move the hand • Flexor carpi radialis • Flexes and abducts the wrist • Palmaris longus • Flexes at the wrist • Flexor carpi ulnaris • Flexes and adducts the wrist
- 8. © 2015 Pearson Education, Inc. Figure 11.8b Muscles That Move the Forearm and Hand, Part I Coracoid process of scapula Humerus Coracobrachialis Triceps brachii, long head Triceps brachii, medial head Pronator teres Medial epicondyle of humerus FLEXORS AT THE ELBOW Biceps brachii, long head Biceps brachii, short head Brachialis Brachioradialis FLEXORS AT THE WRIST Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Palmar carpal ligament Flexor retinaculum Muscles That Move the Hand Muscles That Move the Forearm Superficial muscles of the right upper limb, anterior view b
- 9. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Forearm and Hand • Posterior view • Muscles that move the forearm • Anconeus • Extension at the elbow • Triceps brachii • Lateral head: extension at the elbow • Long head: extension at the elbow and adduction at the shoulder • Medial head: extension at the elbow
- 10. © 2015 Pearson Education, Inc. Figure 11.10b Muscles That Move the Forearm and Hand, Part II Infraglenoid tubercle of scapula Olecranon of ulna Brachioradialis EXTENSORS AT THE ELBOW Triceps brachii, lateral head Triceps brachii, long head Anconeus EXTENSORS AT THE WRIST Extensor carpi radialis longus Extensor carpi ulnaris Extensor carpi radialis brevis Abductor pollicis longus Extensor pollicis brevis Flexor carpi ulnaris Extensor digitorum Ulna Radius Extensor retinaculum A diagrammatic view of a dissection of the superficial muscles b Muscles That Move the Hand Muscles That Move the Forearm
- 11. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Forearm and Hand • Posterior view • Muscles that move the hand • Extensor carpi radialis longus • Extension and abduction at wrist • Extensor carpi ulnaris • Extension and adduction at wrist • Extensor carpi radialis brevis • Extension and abduction at wrist
- 12. © 2015 Pearson Education, Inc. Figure 11.10b Muscles That Move the Forearm and Hand, Part II Infraglenoid tubercle of scapula Olecranon of ulna Brachioradialis EXTENSORS AT THE ELBOW Triceps brachii, lateral head Triceps brachii, long head Anconeus EXTENSORS AT THE WRIST Extensor carpi radialis longus Extensor carpi ulnaris Extensor carpi radialis brevis Abductor pollicis longus Extensor pollicis brevis Flexor carpi ulnaris Extensor digitorum Ulna Radius Extensor retinaculum A diagrammatic view of a dissection of the superficial muscles b Muscles That Move the Hand Muscles That Move the Forearm
- 13. © 2015 Pearson Education, Inc. Muscles That Move the Forearm and Hand
- 14. © 2015 Pearson Education, Inc. A&P Flix: Movement of the Elbow Joint
- 15. © 2015 Pearson Education, Inc. A&P Flix: Muscles of the Elbow Joint (a)
- 16. © 2015 Pearson Education, Inc. A&P Flix: Muscles of the Elbow Joint (b)
- 17. © 2015 Pearson Education, Inc. A&P Flix: Muscles of the Elbow Joint (c)
- 18. © 2015 Pearson Education, Inc. A&P Flix: Biceps Brachii
- 19. © 2015 Pearson Education, Inc. A&P Flix: Triceps Brachii
- 20. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Hand and Fingers • Extrinsic muscles of the hand • Relatively large muscles that perform flexion and extension at the joints of the fingers • Provide strength and crude control of the hand and fingers • These muscles are found mostly in the forearm
- 21. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Muscles That Move the Hand and Fingers • Intrinsic muscles of the hand • Smaller muscles that provide fine control of hand • Responsible for flexion and extension, and abduction and adduction of the fingers at the metacarpophalangeal joints • Responsible for opposition and reposition of the thumb • These muscles are found mostly in the palm or the dorsum of the hand
- 22. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Extrinsic Muscles of the Hand • Anterior view • Flexor digitorum superficialis • Flexion at the wrist and some digits • Flexor digitorum profundus • Flexion at the wrist and some digits • Flexor pollicis longus • Flexion of the thumb
- 23. © 2015 Pearson Education, Inc. Figure 11.11b Extrinsic Muscles That Move the Hands and Fingers Median nerve Pronator teres (cut) Brachial artery Radius Ulna Flexor carpi ulnaris (retracted) Tendon of biceps brachii Brachioradialis (retracted) Flexor digitorum superficialis Flexor pollicis longus Flexor digitorum profundus Muscles That Flex the Fingers and Thumb MEDIALLATERAL Anterior view of the middle layer of muscles. The flexor carpi radialis and palmaris longus muscles have been removed. b
- 24. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Extrinsic Muscles of the Hand (continued) • Posterior view • Abductor pollicis longus • Abduction of thumb • Extensor digitorum • Extension of fingers and wrist • Extensor pollicis brevis • Extension of thumb, abducts the wrist • Extensor digiti minimi • Extension of little finger, extension of wrist
- 25. © 2015 Pearson Education, Inc. Figure 11.11e Extrinsic Muscles That Move the Hands and Fingers Anconeus Extensor digitorum Extensor digiti minimi Muscles That Extend the Fingers Abductor pollicis longus Extensor pollicis brevis Tendon of extensor pollicis longus MEDIAL LATERAL Posterior view of the middle layer of muscles.e
- 26. © 2015 Pearson Education, Inc. Figure 11.11f Extrinsic Muscles That Move the Hands and Fingers Anconeus Supinator Muscles That Move the Thumb Abductor pollicis longus Extensor pollicis longus Extensor pollicis brevis Radius Extensor indicis Ulna Tendon of extensor digiti minimi (cut) Tendons of extensor digitorum (cut) LATERALMEDIAL Posterior view of the deep layer of muscles. See also Figures 7.7, 7.8, and 11.9. f
- 27. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Intrinsic Muscles of the Hand • Adductor pollicis • Adducts the thumb • Flexor pollicis brevis • Flexes and adducts thumb • Abductor pollicis brevis • Abducts the thumb
- 28. © 2015 Pearson Education, Inc. Figure 11.12c Intrinsic Muscles, Tendons, and Ligaments of the Hand, Part I Tendon of flexor digitorum profundus Tendon of flexor digitorum superficialis Tendons of flexor digitorum Tendon of flexor pollicis longus Intrinsic Muscles of the Thumb Adductor pollicis Flexor pollicis brevis Opponens pollicis Abductor pollicis brevis Tendon of palmaris longus Tendon of flexor carpi radialis Synovial sheaths Intrinsic Muscles of the Hand Lumbricals Palmar interosseus First dorsal interosseus Abductor digiti minimi Flexor digiti minimi brevis Opponens digiti minimi Palmaris brevis (cut) Flexor retinaculum Tendon of flexor carpi ulnaris Anterior (palmar) viewc
- 29. © 2015 Pearson Education, Inc. Muscles of the Pectoral Girdle and Upper Limbs • Intrinsic Muscles of the Hand • Abductor digiti minimi • Abducts little finger
- 30. © 2015 Pearson Education, Inc. Figure 11.12c Intrinsic Muscles, Tendons, and Ligaments of the Hand, Part I Tendon of flexor digitorum profundus Tendon of flexor digitorum superficialis Tendons of flexor digitorum Tendon of flexor pollicis longus Intrinsic Muscles of the Thumb Adductor pollicis Flexor pollicis brevis Opponens pollicis Abductor pollicis brevis Tendon of palmaris longus Tendon of flexor carpi radialis Synovial sheaths Intrinsic Muscles of the Hand Lumbricals Palmar interosseus First dorsal interosseus Abductor digiti minimi Flexor digiti minimi brevis Opponens digiti minimi Palmaris brevis (cut) Flexor retinaculum Tendon of flexor carpi ulnaris Anterior (palmar) viewc