KinesiologyKinesiologyKinesiologyKinesiology

PED 2440PED 2440

MusclesMuscles• 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

1. Pictures of the wrist and hand muscles

• Look to the name of the muscle for help

• 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

1. Pictures of the wrist and hand muscles

• Look to the name of the muscle for help

Flexor Carpi RadialisFlexor 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

• 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

Flexor Carpi UlnarisFlexor 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

• 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

PalmarisPalmaris

• Palmar

• Origin:

• Medial epicondyle

• Insertion:

• Palmar aponeurosis of 2-5 metacarapls

• Action:

• flexion of the wrist

weak flexion of the elbow

• Palmar

• Origin:

• Medial epicondyle

• Insertion:

• Palmar aponeurosis of 2-5 metacarapls

• Action:

• flexion of the wrist

weak flexion of the elbow

Flexor Digitorum Superficialis

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)

• 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)

Flexor Digitorum Profundus

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

Flexor Pollicus LongusFlexor 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

• 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

Extensor Carpi Radialis LongusExtensor 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

• 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

Extensor Carpi UlnarisExtensor 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

• 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

Extensor DigitorumExtensor 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

• 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

Extensor IndicisExtensor Indicis

• Dorsal

• Origin: – Distal, posterior ulna

• Insertion: – middle and distal phalanxes of the

second phalange

• Actions: –– Extension of the 2Extension of the 2ndnd finger finger

– Weak wrist extension

Extensor Digiti MinimiExtensor Digiti Minimi

• Dorsal

• Origin: – Lateral epicondyle of the humerus

• Insertion: –– Base of the middle and distal Base of the middle and distal

phalanxes of the 5phalanxes of the 5thth phalange phalange

• Actions: –– Extension of the 5Extension of the 5thth finger finger

– Weak wrist extension

Extensor Pollicis LongusExtensor 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 thumbNOTE: The extensor pollicus brevis and the abductor pollicus will not be covered.

• 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 thumbNOTE: The extensor pollicus brevis and the abductor pollicus will not be covered.

SummarySummary

• 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

• 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

FlexionFlexion• 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

• 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

ExtensionExtension• 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

• 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

Radial Flexion (Abduction)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)

• Besides their actions, what do they have in common?

• Ext. carpi radialis

• Flexor carpi radialis

• Abductor pollicis

(ext. pollicis longus and brevis)

Ulnar Flexion (Adduction)Ulnar Flexion (Adduction)

• Besides their actions, what do they have in common?

• Extensor carpi ulnaris

Flexor carpi ulnaris

• Besides their actions, what do they have in common?

• Extensor carpi ulnaris

Flexor carpi ulnaris

Thumb ActionsThumb Actions

• Flexor pollicis longus

Extensor pollicis longus and brevis

• Flexor pollicis longus

Extensor pollicis longus and brevis

Nerves and ArteriesNerves and Arteries

Nerves (p. 140, 141)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

• 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

ArteriesArteries

• Radial – anterior at wrist and posterior to the hand

• Ulnar - anterior

• Radial – anterior at wrist and posterior to the hand

• Ulnar - anterior