Chapter 11: The Muscular System

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Muscles that Move the Forearm and Hand
Figure 1116a
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Muscles that Move the Forearm and Hand
Figure 1116b
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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)

3D Rotation Muscles of the Forearm and Hand
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Extensors and Flexors

• Extensors
• mainly on posterior and lateral surfaces of arm
• Flexors
• mainly on anterior and medial surfaces

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13 Muscles that Move the Forearm and Hand (1 of
8)

• Biceps brachii
• flexes elbow
• stabilizes shoulder joint
• originates on scapula
• inserts on radial tuberosity

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13 Muscles that Move the Forearm and Hand (2 of
8)

• Triceps brachii
• extends elbow
• originates on scapula
• inserts on olecranon
• Brachialis and brachioradialis
• flex elbow

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13 Muscles that Move the Forearm and Hand (3 of
8)

• Anconeus
• opposes brachialis
• Palmaris longus
• superficial
• flexes wrist

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13 Muscles that Move the Forearm and Hand (4 of
8)

• Flexor carpi ulnaris
• superficial
• flexes wrist
• adducts wrist

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13 Muscles that Move the Forearm and Hand (5 of
8)

• Flexor carpi radialis
• superficial
• flexes wrist
• abducts wrist

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13 Muscles that Move the Forearm and Hand (6 of
8)

• Extensor carpi radialis
• superficial
• extends wrist
• abducts wrist

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13 Muscles that Move the Forearm and Hand (7 of
8)

• Extensor carpi ulnaris
• superficial
• extends wrist
• adducts wrist

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13 Muscles that Move the Forearm and Hand (8 of
8)

• Pronator teres and supinator
• originate on humerus and ulna
• rotate radius
• Pronator quadratus
• originates on ulna
• assists pronator teres

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Muscles that Move the Hand and Fingers
Figure 1117a, b
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Muscles that Move the Hand and Fingers
Figure 1117c, d
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The Intrinsic Muscles of the Hand
Figure 1118a
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The Intrinsic Muscles of the Hand
Figure 1118b