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The Arm Muscles BIO 238 Instructor: Dr. Gourdine 1.

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Presentation on theme: "The Arm Muscles BIO 238 Instructor: Dr. Gourdine 1."— Presentation transcript:

1 The Arm Muscles BIO 238 Instructor: Dr. Gourdine 1

2 LE 8-4 Greater tubercle Lesser tubercle Intertubercular groove Anatomical neck Surgical neck Deltoid tuberosity Lateral epicondyle Coronoid fossa Medial epicondyle Radial fossa Shaft Capitulum Condyle Anterior surface Trochlea Head Greater tubercle Radial groove Olecranon fossa Trochlea Posterior surface

3 LE 8-5 Coronoid process RADIUS Ulnar head Olecranon Proximal radioulnar joint ULNA Styloid process of ulna Posterior view Styloid process of radius Ulnar notch of radius Location of interosseous membrane Radial tuberosity Neck of radius Radial head ULNA Ulnar head Distal radioulnar joint Radial notch Trochlear notch Ulnar tuberosity Anterior view

4 LE 9-10 Humerus Radial collateral ligament Radial tuberosity Radius Ulna Capitulum Annular ligament (covering head and neck of radius) Lateral view Antebrachial interosseous membrane Radius Ulna Medial view Tendon of biceps brachii muscle Annular ligament Humerus Articular capsule Medial epicondyle Ulnar collateral ligament Olecranon of ulna

5 LE 8-6b RADIUS ULNA Triquetrum Posterior view Pisiform Hamate V IV III II I Lunate Scaphoid Trapezium Trapezoid Capitate Metacarpal bones Proximal phalanx Distal phalanx Middle phalanx

6 LE 11-18a Right hand, anterior (palmar) view Flexor retinaculum

7 Elbow Extension and Flexion 7

8 Wrist movements 8

9 Terminology Radial deviation= wrist abduction Ulnar Deviation= wrist adduction 9

10 Muscles of the Upper Extremities: Brachium Biceps brachii (pg 95) ▫O-  Short head-Coracoid process of scapula  Long head-Supraglenoid tubercle of scapula ▫I-Tuberosity of radius, bicipital aponeurosis ▫A-Flexion of elbow, Supination of forearm, flexion of shoulder 10

11 Muscles of the Upper Extremities: Brachium Triceps brachii (pg 97) ▫O-  Long head- Infraglenoid tubercle of the scapula  Lateral head- posterior surface of proximal half of the humerus  Medial head-Posterior surface of distal half of the humerus ▫I- Olecranon process of ulna ▫A-  All heads: Extension of elbow  Long head: extension and adduction of shoulder 11

12 Muscles of the Upper Extremities: Brachium Brachialis (pg 132) ▫O-Distal half of anterior surface of humerus ▫I-Tuberosity and coronoid process of ulna ▫A-Flexion of elbow 12

13 Muscles of the Upper Extremities: Antebrachium - Anterior Brachioradialis (pg 133) ▫O- Proximal 2/3 of the lateral supracondylar ridge of humerus ▫I-Styloid process of radius ▫A-Flexion of elbow ; Assist to pronate and supinate the forearm when the movements are resisted 13

14 Muscles of the Upper Extremities: Antebrachium - Posterior Extensor carpi radialis brevis (pg 136) ▫O-Lateral epicondyle of humerus (common extensor tendon) ▫I-Base of 3rd metacarpal ▫A-Extension and Abduction of wrist, assist with elbow flexion 14

15 Muscles of the Upper Extremities: Antebrachium - Posterior Extensor carpi radialis longus (pg 136) ▫O- Distal 1/3 of the lateral supracondylar ridge of humerus ▫I-Base of 2nd metacarpal ▫A-Extension and abduction of wrist 15

16 Muscles of the Upper Extremities: Antebrachium - Posterior Extensor digitorum (pg 136) ▫O-Lateral epicondyle of humerus (common extensor tendon) ▫I-Bases of Middle and distal phalanges if 2 nd -5 th fingers ▫A-Extension of 2 nd - 5 th fingers 16

17 Muscles of the Upper Extremities: Antebrachium - Posterior Extensor carpi ulnaris (pg 136) ▫O-Lateral epicondyle of humerus (common extensor tendon) ▫I-Base of 5th metacarpal ▫A-Extension and adduction of wrist 17

18 Muscles of the Upper Extremities: Antebrachium - Posterior Anconeus (pg 139) ▫O-Lateral epicondyle of humerus ▫I- Olecranon process and posterior, proximal surface of ulna ▫A- Extension of elbow 18

19 Muscles of the Upper Extremities: Antebrachium - Anterior Flexor carpi radialis (pg 141) ▫O- Common flexor tendon from medial epicondyle of humerus ▫I-Bases of 2nd and 3rd metacarpals ▫A-Flexion and abduction of wrist, may assist with elbow flexion 19

20 Muscles of the Upper Extremities: Antebrachium - Anterior Palmaris longus (pg 141) ▫O-Common flexor tendon from medial epicondyle of humerus ▫I- Palmar aponeurosis, flexor retinaculum ▫A- Tenses palmar fascia, Flexes wrist, may assist with elbow flexion 20

21 Muscles of the Upper Extremities: Antebrachium - Anterior Flexor carpi ulnaris (pg 142) ▫O-  Humeral head: common flexor tendon of medial epicondyle of humerus  Ulnar head: posterior surface of proximal 2/3 of ulna ▫I-Pisiform, hook of hamate, base of 5th metacarpal ▫A-Flexion and adduction of wrist 21

22 Muscles of the Upper Extremities: Antebrachium - Anterior Pronator teres (pg 146) ▫O- Common flexor tendon from medial epicondyle of humerus and coronoid process of ulna ▫I-Middle of lateral surface of radius ▫A-Pronation of forearm, assists in flexion of elbow 22

23 Muscles of the Upper Extremities: Antebrachium - Anterior Pronator Quadratus (pg 147) ▫O-Medial, anterior surface of distal ulna ▫I-Lateral, anterior surface of distal radius ▫A-Pronates forearm 23

24 Muscles of the Upper Extremities: Antebrachium - Anterior Supinator (pg 147) ▫O-Lateral epicondyle of humerus, annular and radial collateral ligaments, proximal ulna at supinator crest ▫I- Anterior, lateral surface of proximal 1/3 of radial shaft ▫A-Supination of forearm 24 Figure 11–16b


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