1. Kinesiology
PED 2440

3. Muscles KEY POINTS: Pictures of the wrist and hand muscles
Muscles only PULL on bones
Muscles only act on those joints which they cross
A muscle (usually) can not cause an opposite action (e.g. flexion and extension)
Origin = stable end; closer to the body
Insertion = movable end; further from the body
Pictures of the wrist and hand muscles
Look to the name of the muscle for help

4. Flexor Carpi Radialis Palmar surface Origin: Insertion: Actions:
medial condyle of the humerus
Insertion:
base of the 2nd and 3rd metacapals (palmar surface)
Actions:
flexion of the wrist
abduction of the wrist
flexion of the elbow

5. Flexor Carpi Ulnaris Palmar Origin: Insertion: Actions:
medial condyle of the humerus
Insertion:
pisiform, base of the 5th metacarpal
Actions:
flexion of the wrist
adduction of the wrist
flexion of the elbow

6. Palmaris Palmar Origin: Insertion: Action: Medial epicondyle
Palmar aponeurosis of 2-5 metacarapls
Action:
flexion of the wrist
weak flexion of the elbow

7. Flexor Digitorum Superficialis
Palmar
Origin:
medial condyle of the humerus
ulnar head - medial coronoid area
radial head - radial tuberosity area
Insertion:
split tendons attach to the sides of the middle phalanx of the four fingers
Actions:
flexion of fingers, wrist and the elbow (weak)

8. Flexor Digitorum Profundus
• Palmar
• Origin:
– Upper, medial surface of the ulna
• Insertion:
– split tendons attach to distal phalanx of the four fingers
• Actions:
– flexion fingers and wrist

9. Flexor Pollicus Longus
Palmar
Origin:
middle anterior surface of the radius
Insertion:
base of the distal phalanx of the thumb (palmar surface)
Actions:
flexion of wrist and thumb

11. Extensor Carpi Radialis Longus
Dorsal
Origin:
lateral condyle of the humerus
Insertion:
base of the 2nd metacarpal
Actions:
Extension of the wrist;
Abduction
Weak extension of the elbow
NOTE: Extensor Carpi Radialis Brevis will not be covered

12. Extensor Carpi Ulnaris
Dorsal
Origin:
lateral epicondyle of the humerus
Insertion:
base of the 5th metacarpal
Actions:
Extension of the wrist
Adduction of the wrist
Weak extension of the elbow

13. Extensor Digitorum Dorsal Origin: Insertion: Actions:
lateral epicondyle of the humerus
Insertion:
middle and distal phalanges of the four fingers
Actions:
Extension of the fingers
Extension of the wrist
Weak extension of the elbow

14. Extensor Indicis • Dorsal • Origin: • Insertion: • Actions:
– Distal, posterior ulna
• Insertion:
– middle and distal phalanxes of the second phalange
• Actions:
– Extension of the 2nd finger
– Weak wrist extension

15. Extensor Digiti Minimi
• Dorsal
• Origin:
– Lateral epicondyle of the humerus
• Insertion:
– Base of the middle and distal phalanxes of the 5th phalange
• Actions:
– Extension of the 5th finger
– Weak wrist extension

16. Extensor Pollicis Longus
Dorsal
Origin:
posterior lateral surface of the distal ulna
Insertion:
base of the last phalanx of the thumb (dorsal side)
Actions:
Extension of the wrist
Extension of the thumb
NOTE: The extensor pollicus brevis and the abductor pollicus will not be covered.

17. Summary
Table 7.1 except for the Extensor Carpi Radialis Brevis, Extensor Pollicus Brevis, and Abductor Pollicus Longus
Quiz
Bones
Joints and their Actions
Muscles
Location
Actions
Other info

18. Flexion Besides their actions, what do they have in common?
Flexor carpi radialis
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor digitorum profundus
Flexor pollicus
Palmaris longus

19. Extension Besides their actions, what do they have in common?
Extensor carpi radialis
Extensor carpi ulnari
Extensor digitorum
Extensor digiti minimi
Extensor indicis
Extensor pollicus longus

20. Radial Flexion (Abduction)
Besides their actions, what do they have in common?
Ext. carpi radialis
Flexor carpi radialis
Abductor pollicis
(ext. pollicis longus and brevis)

21. Ulnar Flexion (Adduction)
Besides their actions, what do they have in common?
Extensor carpi ulnaris
Flexor carpi ulnaris

22. Thumb Actions Flexor pollicis longus
Extensor pollicis longus and brevis

23. Nerves and Arteries

24. Nerves (p. 140, 141) Median Ulnar Radial
Anterior and later muscles of the forearm and radial side of hand
Ulnar
Anterior and medial forearm and ulnar side of hand
Radial
Posterior forearm. No hand muscles Arteries Radial - anterior

26. Arteries Radial – anterior at wrist and posterior to the hand
Ulnar - anterior