REVIEW OF THE WRIST

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REVIEW OF THE WRIST

• Bones, Actions/Movements, and Muscles

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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

3
Lunate
2
1
3
Trapezium
Trapezoid
4
2nd Metacarpal
5
Proximal Phalanx of the 4th Phalange
4
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 (palmar
  surface)
• Actions
• flexion of elbow, wrist and fingers

5
What muscle inserts on palmar surface at the base
of the 5th metacarpal and the pisiform?

• Flexor carpi ulnaris

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Name the action at the wrist
Flexion
Ulnar flexion or adduction
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Palmaris

• Palmar
• Origin Medial epicondyle
• Insertion Palmar aponeurosis
• Action flexion of the wrist

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What nerve passes through the carpal tunnel?

• Median nerve

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• Styloid process
• Scaphoid
• Lunate
• Triquetrum
• Pisiform
• Trapezium
• Trapezoid
• Capitate
• Hamate
• Metacarpals
• Proximal phalange
• Middle phalange
• Distal phalange

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Extensor Carpi Ulnaris

• Dorsal
• origin lateral condyle of the humerus
• insertion base of the 5th metacarpal
• action
• extension of the elbow and wrist
• adduction of the wrist

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Phalanges
Distal planax of the 4th finger
?
?
Middle phalanax of the 2nd finger
?
Proximal phalanx of the thumb or 1st finger
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Extensor Pollicus Brevis
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Abductor pollicus longus
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Extensor carpi radialis brevis
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Extensor Carpi Radialis Longus

• Dorsal
• origin lateral condyle of the humerus
• insertion base of the 2nd metacarpal (dorsal
  side)
• action
• extension of elbow and wrist
• abduction

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Name the bone
Radius
Wrist
Elbow
Name the bone
Ulna
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Extensor Digitorum

• Dorsal
• origin lateral condyle of the humerus
• insertion middle and distal phalanges of the
  four fingers (dorsal side)
• action extension of the elbow, wrist and fingers

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Name the action at the fingers
Flexion
Adbuction
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What muscle inserts on the dorsal surface at the
base of the 5th metacarpal?

• Extensor carpi ulnaris
• EXTENSOR because it is on the dorsal surface.
• CARPI because it inserts on a metacarpal (or
  carpal) bone
• ULNAR because it inserts to the medial side (5th
  metacarpal) of the wrist.

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Flexor Carpi Ulnaris

• Palmar
• Origin medial condyle of the humerus
• Insertion pisiform, base of the 5th metacarpal
• Action
• flexion of the elbow
• flexion of the wrist
• adduction of the wrist

?
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Action at her wrists?
Flexion
Action at his wrists?
Adduction
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• 1. Flexor retinaculum
• 2. Median Nerve
• 3. Ulnar Nerve

1. Structure?

3. Nerve ?
2. Nerve ?
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Flexor Carpi Radialis

• Palmar
• Origin medial condyle of the humerus
• Insertion base of the 2nd and 3rd metacapals
  (palmar surface)
• Action
• flexion of the elbow
• flexion of the wrist
• abduction of the wrist

?
24
Name the bone
Radius
Elbow
Wrist
Name the bone
Ulna
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Extensor Pollicis Longus

• Dorsal
• origin upper posterior surface of the ulna
• insertion base of the last phalanx of the thumb
  (dorsal side)
• action extension of the wrist and thumb
• palpation most prominent on the dorsal side of
  the hand

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Metacarpals 1 through 5
2nd metacarpal
?
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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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?
Distal Phalanx of Thumb
?
4th Metacarpal
?
Hamate
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What group of muscle originate from the lateral
epicondyle?

• Extensor muscles.

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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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Artery ?
Radial
Artery ?
Ulnar
Nerve ?
Ulnar
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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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• Scaphoid
• Lunate
• Triquetrum
• Pisiform
• Trapezium
• Trapezoid
• Capitate
• Hamate
• Metacarpals
• Proximal phalange
• Middle phalange
• Distal phalange

34
While doing push-ups, the wrist is typically in
what position?

• Extension

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Flexor carpi radialis
Flexor carpi ulnaris
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Extensor carpi ulnaris
Extensor digitorum
Extensor carpi radialis longus and brevis
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