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Myology part 2
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Figure 11-12a Muscles of the Pelvic Floor
Superficial Dissections Ischiocavernosus Bulbospongiosus Vagina Superficial transverse perineal Anus Gluteus maximus Female © 2012 Pearson Education, Inc.
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Figure 11-12a Muscles of the Pelvic Floor
Deep Dissections Urethra Urogenital Diaphragm External urethral sphincter Deep transverse perineal Central tendon of perineum Pelvic Diaphragm Pubococcygeus Levator ani Iliococcygeus External anal sphincter Coccygeus Sacrotuberous ligament Female © 2012 Pearson Education, Inc.
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Figure 11-12b Muscles of the Pelvic Floor
Superficial Dissections Testis Urethra (connecting segment removed) Ischiocavernosus Bulbospongiosus Superficial transverse perineal Anus Gluteus maximus Male © 2012 Pearson Education, Inc.
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Figure 11-12b Muscles of the Pelvic Floor
Deep Dissections UROGENITAL TRIANGLE OF PERINEUM Urogenital Diaphragm External urethral sphincter Deep transverse perineal Central tendon of perineum Pelvic Diaphragm Pubococcygeus Levator ani Iliococcygeus External anal sphincter Coccygeus Sacrotuberous ligament ANAL TRIANGLE Male © 2012 Pearson Education, Inc.
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Table 11-10 Muscles of the Pelvic Floor (Figure 11–12)
© 2012 Pearson Education, Inc.
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Table 11-10 Muscles of the Pelvic Floor (Figure 11–12)
© 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Appendicular Muscles Position and stabilize pectoral and pelvic girdles Move upper and lower limbs Two divisions of appendicular muscles Muscles of the shoulders and upper limbs Muscles of the pelvis and lower limbs © 2012 Pearson Education, Inc.
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Figure 11-13a An Overview of the Appendicular Muscles of the Trunk
Superficial Dissection Axial Muscles Platysma Appendicular Muscles Deltoid Pectoralis major Latissimus dorsi Serratus anterior Anterior view ATLAS: Plates 25; 39b © 2012 Pearson Education, Inc.
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Figure 11-13a An Overview of the Appendicular Muscles of the Trunk
Deep Dissection Axial Muscles Sternocleidomastoid Appendicular Muscles Trapezius Subclavius Deltoid (cut and reflected) Pectoralis minor Subscapularis Pectoralis major (cut and reflected) Coracobrachialis Biceps brachii Teres major Serratus anterior Anterior view ATLAS: Plates 25; 39b © 2012 Pearson Education, Inc.
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Figure 11-13a An Overview of the Appendicular Muscles of the Trunk
Superficial Dissection Axial Muscles External oblique Rectus sheath Superficial inguinal ring Appendicular Muscles Tensor fasciae latae Sartorius Rectus femoris Anterior view ATLAS: Plates 25; 39b © 2012 Pearson Education, Inc.
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Figure 11-13a An Overview of the Appendicular Muscles of the Trunk
Deep Dissection Axial Muscles External intercostal Internal intercostal Internal oblique (cut) External oblique (cut and reflected) Rectus abdominis Transversus abdominis Appendicular Muscles Gluteus medius Iliopsoas Pectineus Adductor longus Gracilis Anterior view ATLAS: Plates 25; 39b © 2012 Pearson Education, Inc.
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Figure 11-13b An Overview of the Appendicular Muscles of the Trunk
Superficial Dissection Axial Muscles Sternocleidomastoid Appendicular Muscles Trapezius Deltoid Infraspinatus Teres minor Teres major Triceps brachii Posterior view ATLAS: Plate 40a,b © 2012 Pearson Education, Inc.
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Figure 11-13b An Overview of the Appendicular Muscles of the Trunk
Deep Dissection Axial Muscles Semispinalis capitis Splenius capitis Appendicular Muscles Levator scapulae Supraspinatus Rhomboid minor Rhomboid major Posterior view ATLAS: Plate 40a,b © 2012 Pearson Education, Inc.
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Figure 11-13b An Overview of the Appendicular Muscles of the Trunk
Superficial Dissection Appendicular Muscles Latissimus dorsi Thoracolumbar fascia Iliac crest Gluteus medius Gluteus maximus Posterior view ATLAS: Plate 40a,b © 2012 Pearson Education, Inc.
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Figure 11-13b An Overview of the Appendicular Muscles of the Trunk
Deep Dissection Axial Muscles Erector spinae muscle group External oblique Posterior view ATLAS: Plate 40a,b © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles of the Shoulders and Upper Limbs Four groups Muscles that position the pectoral girdle Muscles that move the arm Muscles that move the forearm and hand Muscles that move the hand and fingers © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles That Position the Pectoral Girdle Trapezius Superficial Covers back and neck to base of skull Inserts on clavicles and scapular spines © 2012 Pearson Education, Inc.
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Figure 11-14a Muscles That Position the Pectoral Girdle
Trapezius Levator scapulae Subclavius Pectoralis minor Pectoralis major (cut and reflected) Internal intercostals External intercostals T12 Anterior view ATLAS: Plates 39a-d; 40a–b © 2012 Pearson Education, Inc.
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Figure 11-14b Muscles That Position the Pectoral Girdle
Superficial Dissection Muscles That Position the Pectoral Girdle Trapezius Posterior view ATLAS: Plates 27b; 40a–b © 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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Figure 11-14b Muscles That Position the Pectoral Girdle
Deep Dissection Muscles That Position the Pectoral Girdle Levator scapulae Rhomboid minor Rhomboid major Scapula Serratus anterior Triceps brachii T12 vertebra Posterior view ATLAS: Plates 27b; 40a–b © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles That Position the Pectoral Girdle Serratus anterior On the chest Originates along ribs Inserts on anterior scapular margin © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles That Position the Pectoral Girdle Subclavius Originates on ribs Inserts on clavicle Pectoralis minor Attaches to scapula © 2012 Pearson Education, Inc.
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Figure 11-14a Muscles That Position the Pectoral Girdle
Trapezius Levator scapulae Subclavius Pectoralis minor Pectoralis major (cut and reflected) Internal intercostals External intercostals T12 Anterior view ATLAS: Plates 39a-d; 40a–b © 2012 Pearson Education, Inc.
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Figure 11-14a Muscles That Position the Pectoral Girdle
Pectoralis minor (cut) Serratus anterior Biceps brachii, short head Biceps brachii, long head T12 Anterior view ATLAS: Plates 39a-d; 40a–b © 2012 Pearson Education, Inc.
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Table 11-11 Muscles That Position the Pectoral Girdle (Figures 11–13, 11–14)
© 2012 Pearson Education, Inc.
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11-6 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) © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles That Move the Arm Deltoid The major abductor Supraspinatus Assists deltoid © 2012 Pearson Education, Inc.
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Figure 11-15a Muscles That Move the Arm
Superficial Dissection Sternum Clavicle Muscles That Move the Arm Deltoid Pectoralis major Anterior view © 2012 Pearson Education, Inc.
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Figure 11-15b Muscles That Move the Arm
Superficial Dissection Vertebra T1 Muscles That Move the Arm Supraspinatus Deltoid Latissimus dorsi Thoracolumbar fascia Posterior view © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Muscles That Move the Arm Subscapularis and teres major Produce medial rotation at shoulder © 2012 Pearson Education, Inc.
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Figure 11-15a Muscles That Move the Arm
Deep Dissection Ribs (cut) Muscles That Move the Arm Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T12 Anterior view © 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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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 © 2012 Pearson Education, Inc.
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Figure 11-15a Muscles That Move the Arm
Deep Dissection Ribs (cut) Muscles That Move the Arm Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T12 Anterior view © 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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Figure 11-15a Muscles That Move the Arm
Superficial Dissection Sternum Clavicle Muscles That Move the Arm Deltoid Pectoralis major Anterior view © 2012 Pearson Education, Inc.
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Figure 11-15b Muscles That Move the Arm
Superficial Dissection Vertebra T1 Muscles That Move the Arm Supraspinatus Deltoid Latissimus dorsi Thoracolumbar fascia Posterior view © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
The Rotator Cuff Muscles involved in shoulder rotation Supraspinatus, subscapularis, infraspinatus, teres minor, and their tendons © 2012 Pearson Education, Inc.
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Figure 11-15a Muscles That Move the Arm
Deep Dissection Ribs (cut) Muscles That Move the Arm Subscapularis Coracobrachialis Teres major Biceps brachii, short head Biceps brachii, long head Vertebra T12 Anterior view © 2012 Pearson Education, Inc.
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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 © 2012 Pearson Education, Inc.
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Table 11-12 Muscles That Move the Arm (Figures 11–13 to 11–15)
© 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
A&P FLIX Rotator Cuff Muscles: An Overview (a) A&P FLIX Rotator Cuff Muscles: An Overview (b) © 2012 Pearson Education, Inc.
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11-6 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) © 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Flexors of the Elbow Biceps brachii Flexes elbow Stabilizes shoulder joint Originates on scapula Inserts on radial tuberosity Brachialis and brachioradialis © 2012 Pearson Education, Inc.
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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 © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Extensors of the Elbow Triceps brachii Extends elbow Originates on scapula Inserts on olecranon Anconeus Opposes brachialis © 2012 Pearson Education, Inc.
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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 carpi radialis brevis Extensor digitorum Abductor pollicis longus Extensor pollicis brevis Ulna Extensor retinaculum Posterior view, superficial layer © 2012 Pearson Education, Inc.
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Table 11-13 Muscles That Move the Forearm and Hand (Figure 11–16)
© 2012 Pearson Education, Inc.
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11-6 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) © 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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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 © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Extensors of the Wrist Extensor carpi radialis Superficial, extends wrist, abducts wrist Extensor carpi ulnaris Superficial, extends wrist, adducts wrist © 2012 Pearson Education, Inc.
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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 carpi radialis brevis Extensor digitorum Abductor pollicis longus Extensor pollicis brevis Ulna Extensor retinaculum Posterior view, superficial layer © 2012 Pearson Education, Inc.
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Table 11-13 Muscles That Move the Forearm and Hand (Figure 11–16)
© 2012 Pearson Education, Inc.
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11-6 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 © 2012 Pearson Education, Inc.
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11-6 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) © 2012 Pearson Education, Inc.
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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 © 2012 Pearson Education, Inc.
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Figure 11-17b Muscles That Move the Hand and Fingers
Brachialis Cut tendons of flexor digitorum superficialis Supinator Muscles That Flex the Fingers and Thumb Flexor pollicis longus Flexor digitorum profundus Pronator quadratus Anterior view, deepest layer © 2012 Pearson Education, Inc.
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Figure 11-17d Muscles That Move the Hand and Fingers
Anconeus Supinator Muscles That Move the Thumb Abductor pollicis longus Extensor pollicis longus Extensor indicis Extensor pollicis brevis Ulna Radius Tendon of extensor digiti minimi (cut) Tendon of extensor digitorum (cut) Posterior view, deepest layer © 2012 Pearson Education, Inc.
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Table 11-13 Muscles That Move the Forearm and Hand (Figure 11–16)
© 2012 Pearson Education, Inc.
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11-6 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) © 2012 Pearson Education, Inc.
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Figure 11-17a Muscles That Move the Hand and Fingers
Median nerve Tendon of biceps brachii Pronator teres (cut) Brachial artery Radius Flexor carpi ulnaris (retracted) Muscles That Flex the Fingers and Thumb Brachioradialis (retracted) Flexor digitorum superficialis Flexor pollicis longus Flexor digitorum profundus LATERAL MEDIAL Anterior view, middle layer © 2012 Pearson Education, Inc.
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Figure 11-17b Muscles That Move the Hand and Fingers
Brachialis Cut tendons of flexor digitorum superficialis Supinator Muscles That Flex the Fingers and Thumb Flexor pollicis longus Flexor digitorum profundus Pronator quadratus Anterior view, deepest layer © 2012 Pearson Education, Inc.
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Figure 11-17c Muscles That Move the Hand and Fingers
Anconeus Muscles That Extend the Fingers Extensor digitorum Extensor digiti minimi Abductor pollicis longus Extensor pollicis brevis Tendon of extensor pollicis longus MEDIAL LATERAL Posterior view, middle layer © 2012 Pearson Education, Inc.
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Figure 11-17d Muscles That Move the Hand and Fingers
Anconeus Supinator Muscles That Move the Thumb Abductor pollicis longus Extensor pollicis longus Extensor indicis Extensor pollicis brevis Ulna Radius Tendon of extensor digiti minimi (cut) Tendon of extensor digitorum (cut) Posterior view, deepest layer © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Tendon Sheaths Extensor retinaculum Wide band of connective tissue Posterior surface of wrist Stabilizes tendons of extensor muscles © 2012 Pearson Education, Inc.
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Figure 11-18b Intrinsic Muscles of the Hand
Tendon of extensor indicis Tendons of extensor digitorum Intrinsic Muscles of the Hand First dorsal interosseus muscle Tendon of extensor digiti minimi Abductor digiti minimi Tendon of extensor pollicis longus Tendon of extensor pollicis brevis Tendon of extensor carpi ulnaris Tendon of extensor carpi radialis longus Extensor retinaculum Tendon of extensor carpi radialis brevis Right hand, posterior view © 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
Tendon Sheaths Flexor retinaculum Anterior surface of wrist Stabilizes tendons of flexor muscles © 2012 Pearson Education, Inc.
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Figure 11-18a Intrinsic Muscles of the Hand
Tendon of flexor digitorum profundus Tendon of flexor digitorum superficialis Synovial sheaths Tendons of flexor digitorum Intrinsic Muscles of the Hand Tendon of flexor pollicis longus Lumbricals Palmar interosseus Intrinsic Muscles of the Thumb First dorsal interosseus Abductor digiti minimi Adductor pollicis Flexor digiti minimi brevis Flexor pollicis brevis Opponens digiti minimi Opponens pollicis Palmaris brevis (cut) Abductor pollicis brevis Flexor retinaculum Tendon of palmaris longus Tendon of flexor carpi radialis Tendon of flexor carpi ulnaris Right hand, anterior (palmar) view © 2012 Pearson Education, Inc.
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Table 11-14 Muscles That Move the Hand and Fingers (Figure 11–17)
© 2012 Pearson Education, Inc.
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11-6 Appendicular Musculature
The Intrinsic Muscles of the Hand Muscles that move the metacarpals and phalanges And originate and insert only on those bones © 2012 Pearson Education, Inc.
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Figure 11-18a Intrinsic Muscles of the Hand
Tendon of flexor digitorum profundus Tendon of flexor digitorum superficialis Synovial sheaths Tendons of flexor digitorum Intrinsic Muscles of the Hand Tendon of flexor pollicis longus Lumbricals Palmar interosseus Intrinsic Muscles of the Thumb First dorsal interosseus Abductor digiti minimi Adductor pollicis Flexor digiti minimi brevis Flexor pollicis brevis Opponens digiti minimi Opponens pollicis Palmaris brevis (cut) Abductor pollicis brevis Flexor retinaculum Tendon of palmaris longus Tendon of flexor carpi radialis Tendon of flexor carpi ulnaris Right hand, anterior (palmar) view © 2012 Pearson Education, Inc.
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Figure 11-18b Intrinsic Muscles of the Hand
Tendon of extensor indicis Tendons of extensor digitorum Intrinsic Muscles of the Hand First dorsal interosseus muscle Tendon of extensor digiti minimi Abductor digiti minimi Tendon of extensor pollicis longus Tendon of extensor pollicis brevis Tendon of extensor carpi ulnaris Tendon of extensor carpi radialis longus Extensor retinaculum Tendon of extensor carpi radialis brevis Right hand, posterior view © 2012 Pearson Education, Inc.
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Table 11-15 Intrinsic Muscles of the Hand (Figure 11–18)
© 2012 Pearson Education, Inc.
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