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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
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
Palmaris
Palmar Origin: Medial epicondyle Insertion: Palmar
aponeurosis Action: flexion of the wrist
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 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
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
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
?
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
?
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
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
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 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