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Muscles of the shoulders, arm, and hand
Lab 20 Muscles of the shoulders, arm, and hand
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Quiz for next week Tuesday or Thursday? Same format as today
Know Upper Arm, Lower Arm, Hip and Thigh, Upper Leg and Lower Leg
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Muscles to know supraspinatus infraspinatus subscapularis teres major
rhomboid levator scapulae deltoid biceps brachii brachialis triceps brachii flexor carpi radialis flexor carpi ulnaris flexor digitorum sup. extensor carpi ulnaris extensor digitorum extensor carpi radialis brachioradialis
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Cut activity 4 Only hand muscles you need to know are not explicitly mentioned in the lab (but they do appear in the pictures): flexor pollicus longus extensor pollicis longus
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Muscles that Move the Arm
Figure 11–15a
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Muscles that Move the Arm
Figure 11–15b
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Muscles that Move the Arm (1 of 3)
Deltoid: the major abductor Supraspinatus: assists deltoid Subscapularis and teres major: produce medial rotation at shoulder
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Muscles that Move the Arm (2 of 3)
Infraspinatus: produce lateral rotation at shoulder
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Muscles that Move the Arm (3 of 3)
Pectoralis major: between anterior chest and greater tubercle of humerus produces flexion at shoulder joint Latissimus dorsi: between thoracic vertebrae and humerus produces extension at shoulder joint
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The Rotator Cuff Muscles involved in shoulder rotation
supraspinatus, subscapularis, infraspinatus, teres minor,and their tendons
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Summary: Muscles that Move the Arm
Table 11–12
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Muscles that Position the Pectoral Girdle
Rhomboid and levator scapulae: deep to trapezius attach to cervical and thoracic vertebrae insert on scapular border
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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)
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Extensors and Flexors Extensors: Flexors:
mainly on posterior and lateral surfaces of arm Flexors: mainly on anterior and medial surfaces
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Muscles that Move the Forearm and Hand
Biceps brachii: flexes elbow stabilizes shoulder joint originates on scapula and humerus inserts on radial tuberosity
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Muscles that Move the Forearm and Hand
Triceps brachii: extends elbow originates on scapula (three spots) inserts on olecranon Brachialis and brachioradialis: assist in flexing elbow (synergists)
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Muscles that Move the Forearm and Hand -Extensors
Figure 11–16a
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Muscles that Move the Forearm and Hand - Flexors
Figure 11–16b
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Muscles that Move the Forearm and Hand
Flexor carpi ulnaris: superficial flexes wrist adducts wrist
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Muscles that Move the Forearm and Hand
Flexor carpi radialis: superficial flexes wrist abducts wrist
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Muscles that Move the Forearm and Hand
Extensor carpi radialis: superficial extends wrist abducts wrist
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Muscles that Move the Forearm and Hand
Extensor carpi ulnaris: superficial extends wrist adducts wrist
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Figure 11–16a
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Figure 11–16b
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Summary: Muscles that Move the Forearm and Hand
Table 11–13 (1 of 2)
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Today Work through lab 20 Relevant parts of lab reports due Next Week
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