ANAT: Palm of the Hand Flashcards Preview

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Flashcards in ANAT: Palm of the Hand Deck (45):
1

Carpal bones (proxolateral to distomedial)

Proximal row: Scaphoid, Lunate, Triquetral, Pisiform
Distal row: Trapezium, Trapezoid, Capitate, Hamate

2

Flexor retinaculum attachments

Medial: pisiform and Hook of Hamate
Lateral: Tubercles of Scaphoid and Trapezium

3

Contents of carpal tunnel proper

Tendons: flexor digitorum superficialis, flexor digitorum produndus, flexor pollicis longus
Median n.

4

Palmaris Brevis ORIGIN

medial palmar aponeurosis and flexor retinaculum

5

Palmaris Brevis INSERTION

skin of the medial palm

6

Palmaris Brevis ACTION

wrinkles the skin of the medial palm

7

Palmaris Brevis INNERVATION

Superficial branch of the Ulnar n.

8

Dupuytren's contracture

Pathological fibrosus and shortening of the palmar aponeurosis or logitudinal digital bands creating traction of the fibrous digital sheaths resulting in flexure deformity of the digits (IV-V)

9

Common flexor synovial sheath (Ulnar bursa)

Common sheath enveloping tendons of the flexor digitorum superficialis and flexor digitorum profundus
-continuous distally with the digital synovial sheath of digit V

10

Synovial sheath of Flexor pollicis longus (radial bursa)

Lateral to the common synovial flexor sheath, continues distally with the digital synovial sheath of the thumb

11

Digital synovial sheaths

Envelop flexor tendons within the digital tunnels
-Synovial sheaths of digits II-IV terminate proximally at metacarpal mid-shaft, but digital sheaths of digits I and V are continuous with radial and ulnar bursae

12

Thenar muscles

Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

13

Thenar muscle [N]

Recurrent branch of the median n.

14

Thenar muscle [O]

Flexor retinaculum and bony attachments (pisiform, Hook of Hamate, and tubercles of Scaphoid and Trapezium)

15

Abductor pollicis brevis INSERTION

Base of proximal phalanx of the thumb

16

Abductor pollicis brevis [A]

Abducts the thumb

17

Flexor pollicis brevis [I]

Base of the proximal phalanx of the thumb

18

Flexor pollicis brevis [A]

Flexes CM and MP joints of the thumb

19

Opponens pollicis [I]

Lateral shaft of metacarpal 1

20

Opponens pollicis [A]

Opposes the thumb

21

Hypothenar muscles

Abductor digiti minimi, Flexor digiti minimi, Opponens digiti minimi

22

Hypothenar muscle [O]

Flexor retinaculum and attachments

23

Hypothenar muscle [N]

Deep branch of the ulnar n.

24

Abductor digiti minimi [I]

Medial base of the proximal phalanx of digit V

25

Abductor digiti minimi [A]

Abducts digit V

26

Flexor digiti minimi [I]

base of proximal phalanx of digit V

27

Flexor digiti minimi [A]

Flexes MP joint of digit V

28

Opponens digiti minimi [I]

Shaft of metacarpal V

29

Opponens digiti minimi [A]

oppose digit V

30

Adductor pollicis [O]

Transverse head: Shaft of metacarpal III
Oblique head: Capitate and bases of metacarpals II-III

31

Adductor pollicis [I]

Medial base of proximal phalanx of the thumb

32

Adductor pollicis [N]

Deep branch of the Ulnar n.

33

Adductor pollicis [A]

Adducts and flexes the thumb

34

Palmar interosseous muscles [O]

Shafts of metacarpals II, IV, and V

35

Palmar interosseous muscles [I]

Extensor expansions of digits II, IV, and V

36

Palmar interosseous muscles [A]

Adduction, flexion of MP joints; extension of DIP and DIP joints

37

Palmar interosseous muscles [N]

Deep branch of the Ulnar n.

38

Dorsal interosseous muscles [O]

bipennate muscles originating from adjacent metacarpal shafts

39

Dorsal interosseous muscles [I]

proximal phalangeal bases and extensor expansions of of digits II-IV

40

Dorsal interosseous muscles [A]

abduction, flexion of the MP joints; extension of PIP and DIP joints

41

Dorsal interosseous muscles [N]

Deep branch of the Ulnar n.

42

Lumbricals [O]

Tendons of flexor digitorum profundus m.

43

Lumbricals [I]

Lateral side of extensor expansions digits II-IV

44

Lumbricals [A]

Adduction of digits IV-V, abduction of digits II-III; Flexion of MP joints, extension of PIP and DIP joints

45

Lumbricals [N]

Lumbricals 1 and 2 by the median n.
Lumbricals 3 and 4 by the deep branch of the ulnar n.