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Lab Activity 11: Group II Muscles Martini Chapter 11 Portland Community College BI 231.

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Presentation on theme: "Lab Activity 11: Group II Muscles Martini Chapter 11 Portland Community College BI 231."— Presentation transcript:

1 Lab Activity 11: Group II Muscles Martini Chapter 11 Portland Community College BI 231

2 2 Origin and Insertion Origin: The place where the fixed end attaches to a bone, cartilage, or connective tissue. Insertion: The site where the movable end attaches to another structure.

3 MUSCLES OF THE SHOULDER AND ARM

4 4 Origin: Anterior surface, lateral clavicle, acromion process and spine of scapula Insertion: Deltoid tubercle of humerus Action: Abducts humerus; aids in flexion, extension, and internal and external rotation Deltoid

5 5 Origin: Supraspinous fossa Insertion: Greater tubercle of humerus Action: Abducts humerus Supraspinatus

6 6 Origin: Infraspinous fossa Insertion: Greater tubercle of humerus Action: Rotates humerus laterally Infraspinatus

7 7 Origin: Axillary border of scapula Insertion: Greater tubercle of humerus Action: Rotates humerus laterally Teres Minor

8 8 Origin: Axillary border at inferior angle of scapula Insertion: Intertubular groove of humerus Action: Extends, adduction and medial rotates humerus. Teres Major

9 9 Origin: Subscapular fossa Insertion: Lesser tubercle of humerus Action: Rotates humerus medially Subscapularis

10 10 Origin: Long head, supraglenoid tubercle; Short head, coracoid process scapula Insertion: Radial tuberosity of the radius Action: Flexes radius and humerus, and supinates forearm Biceps Brachii Short Head Long Head

11 11 Origin: Coracoid process of scapula Insertion: Middle third of humerus Action: Flexes and adducts humerus Coracobrachialis

12 12 Origin: Long head, infraglenoid tubercle; Lateral head, proximal portion of posterior humerus; Medial head, distal half of posterior humerus Insertion: Olecranon process of ulna Action: Extends humerus and ulna Triceps Brachii Long Head Lateral Head

13 13 Origin: Anterior distal two-thirds of humerus Insertion: Coronoid process of ulna Action: Flexes ulna Brachialis

14 14 Origin: Lateral epicondyle of humerus Insertion: Olecranon process, posterior surface of ulna Action: Weak extensor of ulna, stabilizes elbow joint in extension Anconeus

15 MUSCLES OF THE PALM

16 16 Origin: Scaphoid and trapezium Insertion: Proximal phalanx of thumb Action: Abducts thumb and aids in flexion Palm Abductor Pollicis Brevis

17 17 Origin: Trapezium Insertion: Proximal phalanx of thumb Action: Flexes thumb Palm Flexor Pollicis Brevis

18 18 Origin: Hook of hamate Insertion: Proximal phalanx of fifth digit Action: Flexes fifth digit Palm Flexor Digiti Minimi

19 19 Origin: Pisiform and tendon of flexor carpi ulnaris Insertion: Proximal phalanx of fifth digit Action: Abducts fifth digit Palm Abductor Digiti Minimi

20 MUSCLES OF ANTERIOR FOREARM

21 21 Origin: Medial epicondyle of humerus and coronoid process of ulna Insertion: Middle portion of radius Action: Pronates and flexes forearm Pronator Teres Anterior, Superficial Layer

22 22 Origin: Medial epicondyle of humerus Insertion: Base of second metacarpal Action: Flexes wrist and elbow and abducts wrist Flexor Carpi Radialis Anterior, Superficial Layer

23 23 Origin: Medial epicondyle of the humerus Insertion: Palmar aponeurosis Action: Weak flexion of wrist, tenses skin of palm Palmaris Longus Anterior, Superficial Layer

24 24 Origin: Medial epicondyle of humerus, olecranon process, & posterior ulna Insertion: Pisiform, hamate, and fifth metacarpal Action: Flexes and adducts wrist Flexor Carpi Ulnaris Anterior, Superficial Layer

25 25 Origin: Medial epicondyle of humerus and coronoid process of ulna Insertion: Middle phalanges of fingers Action: Flexes fingers and wrist Flexor Digitorum Superficialis Anterior, Middle Layer

26 26 Origin: Anterior and medial surfaces of ulna and interosseous membrane Insertion: Distal phalanges of fingers Action: Flexes fingers and wrist Flexor Digitorum Profundus Anterior, Deepest Layer

27 27 Origin: Middle half of radius, interosseous membrane, coronoid process of ulna Insertion: Distal phalanx of thumb Action: Flexes thumb and wrist Flexor Pollicis Longus Anterior, Deepest Layer

28 MUSCLES OF POSTEROLATERAL FOREARM

29 29 Origin: Lateral supracondylar ridge Insertion: Styloid process of radius Action: Flexes forearm Brachioradialis Posterior, Superficial Layer

30 30 Origin: Lateral supracondylar ridge of humerus Insertion: Second metacarpal Action: Extends and abducts hand Extensor Carpi Radialis Longus Posterior, Superficial Layer

31 31 Origin: Lateral epicondyle of humerus Insertion: Third metacarpal Action: Extends and abducts hand Extensor Carpi Radialis Brevis Posterior, Superficial Layer

32 32 Origin: Lateral epicondyle of humerus Insertion: Into distal phalanx by 4 tendons Action: Extends fingers and hand Extensor Digitorum Posterior, Superficial Layer

33 33 Origin: Lateral epicondyle of humerus and posterior border of ulna Insertion: Fifth metacarpal Action: Extends and adducts hand Extensor Carpi Ulnaris Posterior, Superficial Layer

34 34 Origin: Lateral epicondyle of humerus Insertion: Extensor expansion of little finger Action: Extends 5 th digit and hand Extensor Digiti Minimi Posterior, Middle Layer

35 35 Origin: Lateral epicondyle of humerus, supinator crest of ulna Insertion: Lateral surface and posterior border of radius Action: Supinates forearm Supinator Posterior, Deepest Layer

36 36 Origin: Posterior surface of ulna and radius, and interosseous membrane Insertion: First metacarpal Action: Abducts thumb and hand Abductor Pollicis Longus Posterior, Deepest Layer

37 37 Origin: Middle third of radius and interosseous membrane Insertion: Base of proximal phalanx of thumb Action: Extends thumb Extensor Pollicis Brevis Posterior, Deepest Layer

38 38 Origin: Middle third of ulna and interosseous membrane Insertion: Base of distal phalanx of thumb Action: Extends thumb Extensor Pollicis Longus Posterior, Deepest Layer

39 39 The End


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