REVIEW OF THE WRIST

Bones, Actions/Movements, and Muscles

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

1Trapezium

2 Lunate

3Trapezoid

42nd Metacarpal 5

Proximal Phalanx of the 4th Phalange

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

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

Flexor carpi ulnaris

Name the action at the wrist

FlexionUlnar flexion or adduction

Palmaris

Palmar Origin: Medial epicondyle Insertion: Palmar

aponeurosis Action: flexion of the wrist

What nerve passes through the carpal tunnel?

Median nerve

1. 2. 3. 4. 5. 6. 7. 8. 9. 10.

11. 12. 13.

Styloid processScaphoidLunateTriquetrumPisiformTrapeziumTrapezoidCapitateHamateMetacarpalsProximal phalangeMiddle phalangeDistal phalange

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

Phalanges ? Distal planax of the 4th finger

?

Middle phalanax of the 2nd finger

?

Proximal phalanx of the thumb or 1st finger

Extensor Pollicus Brevis

Abductor pollicus longus

Extensor carpi radialis brevis

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

Name the bone

Elbow

Wrist

Name the bone

Radius

Ulna

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

Name the action at the fingers

FlexionAdbuction

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.

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

?

Action at her wrists?

Action at his wrists?

Flexion

Adduction

2. Nerve ?

3. Nerve ?

1. Structure?

1. Flexor retinaculum

2. Median Nerve

3. Ulnar Nerve

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

?

Name the bone

Elbow Wrist

Name the bone

Radius

Ulna

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

Metacarpals 1 through 5? 2nd metacarpal

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

?

?

?

Distal

Phalanx of Thumb

4th Metacarpal

Hamate

What group of muscle originate from the lateral epicondyle?

Extensor muscles.

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

Artery ?

Artery ?

Nerve ?

Radial

Ulnar

Ulnar

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

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

Scaphoid

Lunate

Triquetrum

Pisiform

Trapezium

Trapezoid

Capitate

Hamate

Metacarpals

Proximal phalange

Middle phalange

Distal phalange

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

Extension

Flexor carpi radialis Flexor carpi ulnaris

Extensor carpi radialis longus and brevis

Extensor digitorum

Extensor carpi ulnaris