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Myology part 2. © 2012 Pearson Education, Inc. Figure 11-12a Muscles of the Pelvic Floor Superficial Dissections Ischiocavernosus Bulbospongiosus Vagina.

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Presentation on theme: "Myology part 2. © 2012 Pearson Education, Inc. Figure 11-12a Muscles of the Pelvic Floor Superficial Dissections Ischiocavernosus Bulbospongiosus Vagina."— Presentation transcript:

1 Myology part 2

2 © 2012 Pearson Education, Inc. Figure 11-12a Muscles of the Pelvic Floor Superficial Dissections Ischiocavernosus Bulbospongiosus Vagina Superficial transverse perineal Anus Gluteus maximus Female

3 © 2012 Pearson Education, Inc. Figure 11-12a Muscles of the Pelvic Floor Urethra Urogenital Diaphragm External urethral sphincter Deep transverse perineal Central tendon of perineum Pelvic Diaphragm Levator ani Pubococcygeus Iliococcygeus External anal sphincter Coccygeus Sacrotuberous ligament Female Deep Dissections

4 © 2012 Pearson Education, Inc. Figure 11-12b Muscles of the Pelvic Floor Male Testis Urethra (connecting segment removed) Ischiocavernosus Bulbospongiosus Superficial transverse perineal Anus Gluteus maximus Superficial Dissections

5 © 2012 Pearson Education, Inc. Figure 11-12b Muscles of the Pelvic Floor Urogenital Diaphragm Pelvic Diaphragm UROGENITAL TRIANGLE OF PERINEUM Iliococcygeus External urethral sphincter Deep transverse perineal Central tendon of perineum Levator ani Pubococcygeus External anal sphincter Coccygeus Sacrotuberous ligament ANAL TRIANGLE Male Deep Dissections

6 © 2012 Pearson Education, Inc. Table Muscles of the Pelvic Floor (Figure 11–12)

7 © 2012 Pearson Education, Inc. Table Muscles of the Pelvic Floor (Figure 11–12)

8 © 2012 Pearson Education, Inc Appendicular Musculature Appendicular Muscles Position and stabilize pectoral and pelvic girdles Move upper and lower limbs Two divisions of appendicular muscles 1. Muscles of the shoulders and upper limbs 2. Muscles of the pelvis and lower limbs

9 © 2012 Pearson Education, Inc. Figure 11-13a An Overview of the Appendicular Muscles of the Trunk Deltoid Superficial Dissection Axial Muscles Platysma Appendicular Muscles Pectoralis major Latissimus dorsi Serratus anterior ATLAS: Plates 25; 39b Anterior view

10 © 2012 Pearson Education, Inc. Figure 11-13a An Overview of the Appendicular Muscles of the Trunk Deep Dissection Axial Muscles Appendicular Muscles Sternocleidomastoid Trapezius Subclavius Deltoid (cut and reflected) Pectoralis minor Subscapularis Pectoralis major (cut and reflected) Coracobrachialis Biceps brachii Teres major Serratus anterior ATLAS: Plates 25; 39b Anterior view

11 © 2012 Pearson Education, Inc. Figure 11-13a An Overview of the Appendicular Muscles of the Trunk ATLAS: Plates 25; 39b Anterior view Axial Muscles Appendicular Muscles External oblique Rectus sheath Tensor fasciae latae Superficial inguinal ring Sartorius Rectus femoris Superficial Dissection

12 © 2012 Pearson Education, Inc. Figure 11-13a An Overview of the Appendicular Muscles of the Trunk ATLAS: Plates 25; 39b Anterior view Axial Muscles Appendicular Muscles External intercostal Internal intercostal Internal oblique (cut) External oblique (cut and reflected) Rectus abdominis Transversus abdominis Gluteus medius Iliopsoas Pectineus Adductor longus Gracilis Deep Dissection

13 © 2012 Pearson Education, Inc. Figure 11-13b An Overview of the Appendicular Muscles of the Trunk Superficial Dissection Axial Muscles Appendicular Muscles Sternocleidomastoid Trapezius Deltoid Infraspinatus Teres minor Teres major Triceps brachii ATLAS: Plate 40a,b Posterior view

14 © 2012 Pearson Education, Inc. Figure 11-13b An Overview of the Appendicular Muscles of the Trunk ATLAS: Plate 40a,b Posterior view Deep Dissection Axial Muscles Appendicular Muscles Semispinalis capitis Splenius capitis Levator scapulae Supraspinatus Rhomboid minor Rhomboid major

15 © 2012 Pearson Education, Inc. Figure 11-13b An Overview of the Appendicular Muscles of the Trunk ATLAS: Plate 40a,b Posterior view Latissimus dorsi Thoracolumbar fascia Iliac crest Gluteus medius Gluteus maximus Superficial Dissection Appendicular Muscles

16 © 2012 Pearson Education, Inc. Figure 11-13b An Overview of the Appendicular Muscles of the Trunk ATLAS: Plate 40a,b Posterior view Deep Dissection Erector spinae muscle group External oblique Axial Muscles

17 © 2012 Pearson Education, Inc Appendicular Musculature Muscles of the Shoulders and Upper Limbs Four groups 1. Muscles that position the pectoral girdle 2. Muscles that move the arm 3. Muscles that move the forearm and hand 4. Muscles that move the hand and fingers

18 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Position the Pectoral Girdle Trapezius Superficial Covers back and neck to base of skull Inserts on clavicles and scapular spines

19 © 2012 Pearson Education, Inc. Figure 11-14a Muscles That Position the Pectoral Girdle Muscles That Position the Pectoral Girdle Trapezius Levator scapulae Subclavius Pectoralis minor Pectoralis major (cut and reflected) Internal intercostals External intercostals T 12 Anterior view ATLAS: Plates 39a-d; 40a–b

20 © 2012 Pearson Education, Inc. Figure 11-14b Muscles That Position the Pectoral Girdle Muscles That Position the Pectoral Girdle Trapezius Superficial Dissection Posterior view ATLAS: Plates 27b; 40a–b

21 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Position the Pectoral Girdle Rhomboid and levator scapulae Deep to trapezius Attach to cervical and thoracic vertebrae Insert on scapular border

22 © 2012 Pearson Education, Inc. Figure 11-14b Muscles That Position the Pectoral Girdle Muscles That Position the Pectoral Girdle Deep Dissection Levator scapulae Rhomboid minor Rhomboid major Scapula Serratus anterior Triceps brachii T 12 vertebra Posterior view ATLAS: Plates 27b; 40a–b

23 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Position the Pectoral Girdle Serratus anterior On the chest Originates along ribs Inserts on anterior scapular margin

24 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Position the Pectoral Girdle Subclavius Originates on ribs Inserts on clavicle Pectoralis minor Attaches to scapula

25 © 2012 Pearson Education, Inc. Figure 11-14a Muscles That Position the Pectoral Girdle Muscles That Position the Pectoral Girdle Trapezius Levator scapulae Subclavius Pectoralis minor Pectoralis major (cut and reflected) Internal intercostals External intercostals T 12 Anterior view ATLAS: Plates 39a-d; 40a–b

26 © 2012 Pearson Education, Inc. Figure 11-14a Muscles That Position the Pectoral Girdle Anterior view ATLAS: Plates 39a-d; 40a–b T 12 Muscles That Position the Pectoral Girdle Pectoralis minor (cut) Serratus anterior Biceps brachii, short head Biceps brachii, long head

27 © 2012 Pearson Education, Inc. Table Muscles That Position the Pectoral Girdle (Figures 11–13, 11–14)

28 © 2012 Pearson Education, Inc Appendicular Musculature A&P FLIX Muscles of the Pectoral Girdle (a) A&P FLIX Muscles of the Pectoral Girdle (b) A&P FLIX Muscles of the Pectoral Girdle (c)

29 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Arm Deltoid The major abductor Supraspinatus Assists deltoid

30 © 2012 Pearson Education, Inc. Figure 11-15a Muscles That Move the Arm Superficial Dissection Muscles That Move the Arm Deltoid Sternum Clavicle Pectoralis major Anterior view

31 © 2012 Pearson Education, Inc. Figure 11-15b Muscles That Move the Arm Superficial Dissection Muscles That Move the Arm Posterior view Supraspinatus Deltoid Latissimus dorsi Thoracolumbar fascia Vertebra T 1

32 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Arm Subscapularis and teres major Produce medial rotation at shoulder

33 © 2012 Pearson Education, Inc. Figure 11-15a Muscles That Move the Arm Deep Dissection Muscles That Move the Arm Ribs (cut) Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T 12 Anterior view

34 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Arm Infraspinatus and teres minor Produce lateral rotation at shoulder Coracobrachialis Attaches to scapula Produces flexion and adduction at shoulder

35 © 2012 Pearson Education, Inc. Figure 11-15b Muscles That Move the Arm Deep Dissection Muscles That Move the Arm Supraspinatus Infraspinatus Teres minor Teres major Triceps brachii, long head Triceps brachii, lateral head Posterior view

36 © 2012 Pearson Education, Inc. Figure 11-15a Muscles That Move the Arm Deep Dissection Muscles That Move the Arm Ribs (cut) Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T 12 Anterior view

37 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Arm Pectoralis major Between anterior chest and greater tubercle of humerus Produces flexion at shoulder joint Latissimus dorsi Between thoracic vertebrae and humerus Produces extension at shoulder joint

38 © 2012 Pearson Education, Inc. Figure 11-15a Muscles That Move the Arm Superficial Dissection Muscles That Move the Arm Deltoid Sternum Clavicle Pectoralis major Anterior view

39 © 2012 Pearson Education, Inc. Figure 11-15b Muscles That Move the Arm Superficial Dissection Muscles That Move the Arm Posterior view Supraspinatus Deltoid Latissimus dorsi Thoracolumbar fascia Vertebra T 1

40 © 2012 Pearson Education, Inc Appendicular Musculature The Rotator Cuff Muscles involved in shoulder rotation Supraspinatus, subscapularis, infraspinatus, teres minor, and their tendons

41 © 2012 Pearson Education, Inc. Figure 11-15a Muscles That Move the Arm Deep Dissection Muscles That Move the Arm Ribs (cut) Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T 12 Anterior view

42 © 2012 Pearson Education, Inc. Figure 11-15b Muscles That Move the Arm Deep Dissection Muscles That Move the Arm Supraspinatus Infraspinatus Teres minor Teres major Triceps brachii, long head Triceps brachii, lateral head Posterior view

43 © 2012 Pearson Education, Inc. Table Muscles That Move the Arm (Figures 11–13 to 11–15)

44 © 2012 Pearson Education, Inc Appendicular Musculature A&P FLIX Rotator Cuff Muscles: An Overview (a) A&P FLIX Rotator Cuff Muscles: An Overview (b)

45 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Forearm and Hand Originate on humerus and insert on forearm Exceptions: The major flexor (biceps brachii) The major extensor (triceps brachii)

46 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Forearm and Hand Extensors Mainly on posterior and lateral surfaces of arm Flexors Mainly on anterior and medial surfaces

47 © 2012 Pearson Education, Inc Appendicular Musculature Flexors of the Elbow Biceps brachii Flexes elbow Stabilizes shoulder joint Originates on scapula Inserts on radial tuberosity Brachialis and brachioradialis

48 © 2012 Pearson Education, Inc. Figure 11-16b Muscles That Move the Forearm and Hand Coracoid process of scapula Humerus Coracobrachialis Biceps brachii, short head Biceps brachii, long head Triceps brachii, long head Triceps brachii, medial head Brachialis Medial epicondyle of humerus Pronator teres Brachioradialis Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Flexor retinaculum Anterior view, superficial layer

49 © 2012 Pearson Education, Inc Appendicular Musculature Extensors of the Elbow Triceps brachii Extends elbow Originates on scapula Inserts on olecranon Anconeus Opposes brachialis

50 © 2012 Pearson Education, Inc. Figure 11-16a Muscles That Move the Forearm and Hand Triceps brachii, long head Triceps brachii, lateral head Brachioradialis Olecranon of ulna Anconeus Extensor carpi radialis longus Flexor carpi ulnaris Extensor carpi ulnaris Extensor digitorum Ulna Extensor retinaculum Extensor carpi radialis brevis Abductor pollicis longus Extensor pollicis brevis Posterior view, superficial layer

51 © 2012 Pearson Education, Inc. Table Muscles That Move the Forearm and Hand (Figure 11–16)

52 © 2012 Pearson Education, Inc Appendicular Musculature A&P FLIX Muscles of the Elbow Joint (a) A&P FLIX Muscles of the Elbow Joint (b) A&P FLIX Muscles of the Elbow Joint (c)

53 © 2012 Pearson Education, Inc Appendicular Musculature Flexors of the Wrist Palmaris longus Superficial, flexes wrist Flexor carpi ulnaris Superficial, flexes wrist, adducts wrist Flexor carpi radialis Superficial, flexes wrist, abducts wrist

54 © 2012 Pearson Education, Inc. Figure 11-16b Muscles That Move the Forearm and Hand Coracoid process of scapula Humerus Coracobrachialis Biceps brachii, short head Biceps brachii, long head Triceps brachii, long head Triceps brachii, medial head Brachialis Medial epicondyle of humerus Pronator teres Brachioradialis Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Flexor retinaculum Anterior view, superficial layer

55 © 2012 Pearson Education, Inc Appendicular Musculature Extensors of the Wrist Extensor carpi radialis Superficial, extends wrist, abducts wrist Extensor carpi ulnaris Superficial, extends wrist, adducts wrist

56 © 2012 Pearson Education, Inc. Figure 11-16a Muscles That Move the Forearm and Hand Triceps brachii, long head Triceps brachii, lateral head Brachioradialis Olecranon of ulna Anconeus Extensor carpi radialis longus Flexor carpi ulnaris Extensor carpi ulnaris Extensor digitorum Ulna Extensor retinaculum Extensor carpi radialis brevis Abductor pollicis longus Extensor pollicis brevis Posterior view, superficial layer

57 © 2012 Pearson Education, Inc. Table Muscles That Move the Forearm and Hand (Figure 11–16)

58 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Forearm and Hand Pronation and supination Pronator teres and supinator Originate on humerus and ulna Rotate radius Pronator quadratus Originates on ulna Assists pronator teres

59 © 2012 Pearson Education, Inc Appendicular Musculature A&P FLIX Muscles of the Forearm (a) A&P FLIX Muscles of the Forearm (b) A&P FLIX Muscles of the Forearm (c)

60 © 2012 Pearson Education, Inc. Figure 11-16b Muscles That Move the Forearm and Hand Coracoid process of scapula Humerus Coracobrachialis Biceps brachii, short head Biceps brachii, long head Triceps brachii, long head Triceps brachii, medial head Brachialis Medial epicondyle of humerus Pronator teres Brachioradialis Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Flexor retinaculum Anterior view, superficial layer

61 © 2012 Pearson Education, Inc. Figure 11-17b Muscles That Move the Hand and Fingers Supinator Muscles That Flex the Fingers and Thumb Flexor pollicis longus Flexor digitorum profundus Anterior view, deepest layer Brachialis Cut tendons of flexor digitorum superficialis Pronator quadratus

62 © 2012 Pearson Education, Inc. Figure 11-17d Muscles That Move the Hand and Fingers Anconeus Supinator Muscles That Move the Thumb Abductor pollicis longus Extensor pollicis longus Extensor pollicis brevis Radius Tendon of extensor digitorum (cut) Posterior view, deepest layer Tendon of extensor digiti minimi (cut) Ulna Extensor indicis

63 © 2012 Pearson Education, Inc. Table Muscles That Move the Forearm and Hand (Figure 11–16)

64 © 2012 Pearson Education, Inc Appendicular Musculature Muscles That Move the Hand and Fingers Also called extrinsic muscles of the hand Lie entirely within forearm Only tendons cross wrist (in synovial tendon sheaths)

65 © 2012 Pearson Education, Inc. Figure 11-17a Muscles That Move the Hand and Fingers Median nerve Pronator teres (cut) Brachial artery Radius Flexor carpi ulnaris (retracted) Muscles That Flex the Fingers and Thumb Flexor digitorum superficialis Flexor pollicis longus Flexor digitorum profundus Tendon of biceps brachii Brachioradialis (retracted) MEDIAL LATERAL Anterior view, middle layer

66 © 2012 Pearson Education, Inc. Figure 11-17b Muscles That Move the Hand and Fingers Supinator Muscles That Flex the Fingers and Thumb Flexor pollicis longus Flexor digitorum profundus Anterior view, deepest layer Brachialis Cut tendons of flexor digitorum superficialis Pronator quadratus

67 © 2012 Pearson Education, Inc. Figure 11-17c Muscles That Move the Hand and Fingers Posterior view, middle layer Anconeus Muscles That Extend the Fingers Extensor digitorum Extensor digiti minimi Abductor pollicis longus Extensor pollicis brevis Tendon of extensor pollicis longus LATERAL MEDIAL

68 © 2012 Pearson Education, Inc. Figure 11-17d Muscles That Move the Hand and Fingers Anconeus Supinator Muscles That Move the Thumb Abductor pollicis longus Extensor pollicis longus Extensor pollicis brevis Radius Tendon of extensor digitorum (cut) Posterior view, deepest layer Tendon of extensor digiti minimi (cut) Ulna Extensor indicis

69 © 2012 Pearson Education, Inc Appendicular Musculature Tendon Sheaths Extensor retinaculum Wide band of connective tissue Posterior surface of wrist Stabilizes tendons of extensor muscles

70 © 2012 Pearson Education, Inc. Figure 11-18b Intrinsic Muscles of the Hand Tendons of extensor digitorum Tendon of extensor digiti minimi Tendon of extensor carpi ulnaris Extensor retinaculum Right hand, posterior view Tendon of extensor carpi radialis brevis Tendon of extensor carpi radialis longus Tendon of extensor pollicis brevis Tendon of extensor pollicis longus Abductor digiti minimi First dorsal interosseus muscle Intrinsic Muscles of the Hand Tendon of extensor indicis

71 © 2012 Pearson Education, Inc Appendicular Musculature Tendon Sheaths Flexor retinaculum Anterior surface of wrist Stabilizes tendons of flexor muscles

72 © 2012 Pearson Education, Inc. Figure 11-18a Intrinsic Muscles of the Hand 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 Right hand, anterior (palmar) view 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

73 © 2012 Pearson Education, Inc. Table Muscles That Move the Hand and Fingers (Figure 11–17)

74 © 2012 Pearson Education, Inc Appendicular Musculature The Intrinsic Muscles of the Hand Muscles that move the metacarpals and phalanges And originate and insert only on those bones

75 © 2012 Pearson Education, Inc. Figure 11-18a Intrinsic Muscles of the Hand 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 Right hand, anterior (palmar) view 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

76 © 2012 Pearson Education, Inc. Figure 11-18b Intrinsic Muscles of the Hand Tendons of extensor digitorum Tendon of extensor digiti minimi Tendon of extensor carpi ulnaris Extensor retinaculum Right hand, posterior view Tendon of extensor carpi radialis brevis Tendon of extensor carpi radialis longus Tendon of extensor pollicis brevis Tendon of extensor pollicis longus Abductor digiti minimi First dorsal interosseus muscle Intrinsic Muscles of the Hand Tendon of extensor indicis

77 © 2012 Pearson Education, Inc. Table Intrinsic Muscles of the Hand (Figure 11–18)


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