Download The Arm Muscles

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The Arm Muscles
BIO 238
Instructor: Dr. Gourdine
LE 8-4
Greater tubercle
Head
Lesser tubercle
Intertubercular
groove
Greater tubercle
Anatomical
neck
Surgical
neck
Deltoid
tuberosity
Radial groove
Shaft
Lateral
epicondyle
Olecranon
fossa
Coronoid
fossa
Medial
epicondyle
Radial
fossa
Capitulum Trochlea
Condyle
Anterior surface
Trochlea
Posterior surface
LE 8-5
Olecranon
Coronoid
process
Trochlear notch
Proximal
radioulnar
joint
Radial head
Radial notch
Neck of
radius
Ulnar
tuberosity
Radial
tuberosity
ULNA
ULNA
RADIUS
Location of
interosseous
membrane
Ulnar notch
of radius
Ulnar head
Distal radioulnar
joint
Ulnar
head
Styloid process
of ulna
Posterior view
Styloid
process
of radius
Anterior view
LE 9-10
Tendon of biceps
brachii muscle
Humerus
Radial
collateral
ligament
Humerus
Articular
capsule
Radial
tuberosity
Medial
epicondyle
Ulna
Annular ligament
(covering head and
neck of radius)
Lateral view
Ulnar
collateral
ligament
Radius
Radius
Capitulum
Annular
ligament
Antebrachial
interosseous
membrane
Ulna
Olecranon
of ulna
Medial view
LE 8-6b
RADIUS
ULNA
Lunate
Scaphoid
Triquetrum
Trapezium
Pisiform
Trapezoid
I
Hamate
V
IV
III
II
Capitate
Metacarpal
bones
Proximal
phalanx
Middle
phalanx
Distal
phalanx
Posterior view
LE 11-18a
Flexor retinaculum
Right hand, anterior (palmar) view
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Elbow Extension and Flexion
8
Wrist movements
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Terminology
• Radial deviation= wrist abduction
• Ulnar Deviation= wrist adduction
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
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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
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
•
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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
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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