1. Muscles of the shoulders, arm, and hand
Lab 20
Muscles of the shoulders, arm, and hand

2. Quiz for next week Tuesday or Thursday? Same format as today
Know Upper Arm, Lower Arm, Hip and Thigh, Upper Leg and Lower Leg

3. 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

4. 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

5. Muscles that Move the Arm
Figure 11–15a

6. Muscles that Move the Arm
Figure 11–15b

7. Muscles that Move the Arm (1 of 3)
Deltoid:
the major abductor
Supraspinatus:
assists deltoid
Subscapularis and teres major:
produce medial rotation at shoulder

8. Muscles that Move the Arm (2 of 3)
Infraspinatus:
produce lateral rotation at shoulder

9. 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

10. The Rotator Cuff Muscles involved in shoulder rotation
supraspinatus, subscapularis, infraspinatus, teres minor,and their tendons

11. Summary: Muscles that Move the Arm
Table 11–12

12. Muscles that Position the Pectoral Girdle
Rhomboid and levator scapulae:
deep to trapezius
attach to cervical and thoracic vertebrae
insert on scapular border

13. 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)

14. Extensors and Flexors Extensors: Flexors:
mainly on posterior and lateral surfaces of arm
Flexors:
mainly on anterior and medial surfaces

15. Muscles that Move the Forearm and Hand
Biceps brachii:
flexes elbow
stabilizes shoulder joint
originates on scapula and humerus
inserts on radial tuberosity

16. 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)

17. Muscles that Move the Forearm and Hand -Extensors
Figure 11–16a

18. Muscles that Move the Forearm and Hand - Flexors
Figure 11–16b

19. Muscles that Move the Forearm and Hand
Flexor carpi ulnaris:
superficial
flexes wrist
adducts wrist

20. Muscles that Move the Forearm and Hand
Flexor carpi radialis:
superficial
flexes wrist
abducts wrist

21. Muscles that Move the Forearm and Hand
Extensor carpi radialis:
superficial
extends wrist
abducts wrist

22. Muscles that Move the Forearm and Hand
Extensor carpi ulnaris:
superficial
extends wrist
adducts wrist

23. Figure 11–16a

24. Figure 11–16b

25. Summary: Muscles that Move the Forearm and Hand
Table 11–13 (1 of 2)

26. Today
Work through lab 20
Relevant parts of lab reports due Next Week