ANAT: Palm of the Hand

Question 1

Carpal bones (proxolateral to distomedial)

Answer 1

Proximal row: Scaphoid, Lunate, Triquetral, Pisiform

Distal row: Trapezium, Trapezoid, Capitate, Hamate

Question 2

Flexor retinaculum attachments

Answer 2

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

Question 3

Contents of carpal tunnel proper

Answer 3

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

Question 4

Palmaris Brevis ORIGIN

Answer 4

medial palmar aponeurosis and flexor retinaculum

Question 5

Palmaris Brevis INSERTION

Answer 5

skin of the medial palm

Question 6

Palmaris Brevis ACTION

Answer 6

wrinkles the skin of the medial palm

Question 7

Palmaris Brevis INNERVATION

Answer 7

Superficial branch of the Ulnar n.

Question 8

Dupuytren’s contracture

Answer 8

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)

Question 9

Common flexor synovial sheath (Ulnar bursa)

Answer 9

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

Question 10

Synovial sheath of Flexor pollicis longus (radial bursa)

Answer 10

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

Question 11

Digital synovial sheaths

Answer 11

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

Question 12

Thenar muscles

Answer 12

Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

Question 13

Thenar muscle [N]

Answer 13

Recurrent branch of the median n.

Question 14

Thenar muscle [O]

Answer 14

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

Question 15

Abductor pollicis brevis INSERTION

Answer 15

Base of proximal phalanx of the thumb

Question 16

Abductor pollicis brevis [A]

Answer 16

Abducts the thumb

Question 17

Flexor pollicis brevis [I]

Answer 17

Base of the proximal phalanx of the thumb

Question 18

Flexor pollicis brevis [A]

Answer 18

Flexes CM and MP joints of the thumb

Question 19

Opponens pollicis [I]

Answer 19

Lateral shaft of metacarpal 1

Question 20

Opponens pollicis [A]

Answer 20

Opposes the thumb

Question 21

Hypothenar muscles

Answer 21

Abductor digiti minimi, Flexor digiti minimi, Opponens digiti minimi

Question 22

Hypothenar muscle [O]

Answer 22

Flexor retinaculum and attachments

Question 23

Hypothenar muscle [N]

Answer 23

Deep branch of the ulnar n.

Question 24

Abductor digiti minimi [I]

Answer 24

Medial base of the proximal phalanx of digit V

Question 25

Abductor digiti minimi [A]

Answer 25

Abducts digit V

Question 26

Flexor digiti minimi [I]

Answer 26

base of proximal phalanx of digit V

Question 27

Flexor digiti minimi [A]

Answer 27

Flexes MP joint of digit V

Question 28

Opponens digiti minimi [I]

Answer 28

Shaft of metacarpal V

Question 29

Opponens digiti minimi [A]

Answer 29

oppose digit V

Question 30

Adductor pollicis [O]

Answer 30

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

Question 31

Adductor pollicis [I]

Answer 31

Medial base of proximal phalanx of the thumb

Question 32

Adductor pollicis [N]

Answer 32

Deep branch of the Ulnar n.

Question 33

Adductor pollicis [A]

Answer 33

Adducts and flexes the thumb

Question 34

Palmar interosseous muscles [O]

Answer 34

Shafts of metacarpals II, IV, and V

Question 35

Palmar interosseous muscles [I]

Answer 35

Extensor expansions of digits II, IV, and V

Question 36

Palmar interosseous muscles [A]

Answer 36

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

Question 37

Palmar interosseous muscles [N]

Answer 37

Deep branch of the Ulnar n.

Question 38

Dorsal interosseous muscles [O]

Answer 38

bipennate muscles originating from adjacent metacarpal shafts

Question 39

Dorsal interosseous muscles [I]

Answer 39

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

Question 40

Dorsal interosseous muscles [A]

Answer 40

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

Question 41

Dorsal interosseous muscles [N]

Answer 41

Deep branch of the Ulnar n.

Question 42

Lumbricals [O]

Answer 42

Tendons of flexor digitorum profundus m.

Question 43

Lumbricals [I]

Answer 43

Lateral side of extensor expansions digits II-IV

Question 44

Lumbricals [A]

Answer 44

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

Question 45

Lumbricals [N]

Answer 45

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