Kinesiology

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Kinesiology

• PED 2440

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Muscles

• KEY POINTS
• 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

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Flexor Carpi Radialis

• Palmar surface
• Origin
• 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

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Flexor Carpi Ulnaris

• Palmar
• Origin
• 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

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Palmaris

• Palmar
• Origin
• Medial epicondyle
• Insertion
• Palmar aponeurosis of 2-5 metacarapls
• Action
• flexion of the wrist
• weak flexion of the elbow

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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)

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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
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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

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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

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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

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Extensor Digitorum

• Dorsal
• Origin
• 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

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

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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

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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

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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

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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)

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Ulnar Flexion (Adduction)

• Besides their actions, what do they have in
  common?
• Extensor carpi ulnaris
• Flexor carpi ulnaris

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Thumb Actions

• Flexor pollicis longus
• Extensor pollicis longus and brevis

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Nerves and Arteries
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Nerves (p. 140, 141)

• Median
• 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

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Arteries

• Radial anterior at wrist and posterior to the
  hand
• Ulnar - anterior