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

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

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

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

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

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

7. Elbow Extension and Flexion

8. Wrist movements

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

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

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

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

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

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

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

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 2nd -5th fingers
A-Extension of 2nd - 5th fingers

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

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

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

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

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

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

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

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
Figure 11–16b