Muscles that Move the Forearm and Hand
Figure 11–16a
Muscles that Move the Forearm and Hand
Figure 11–16b
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 HandPLAY
Extensors and Flexors• Extensors:
– mainly on posterior and lateral surfaces of arm
• Flexors:– mainly on anterior and medial
surfaces
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
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
13 Muscles that Move the Forearm and Hand (3 of
8)• Anconeus:
– opposes brachialis• Palmaris longus:
– superficial– flexes wrist
13 Muscles that Move the Forearm and Hand (4 of
8)• Flexor carpi ulnaris:
– superficial– flexes wrist– adducts wrist
13 Muscles that Move the Forearm and Hand (5 of
8)• Flexor carpi radialis:
– superficial– flexes wrist– abducts wrist
13 Muscles that Move the Forearm and Hand (6 of
8)• Extensor carpi radialis:
– superficial– extends wrist– abducts wrist
13 Muscles that Move the Forearm and Hand (7 of
8)• Extensor carpi ulnaris:
– superficial– extends wrist– adducts wrist
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
Muscles that Move the Hand and Fingers
Figure 11–17a, b
Muscles that Move the Hand and Fingers
Figure 11–17c, d
The Intrinsic Muscles of the Hand
Figure 11–18a
The Intrinsic Muscles of the Hand
Figure 11–18b
