Wrist & Hand Outcomes

Question 1

What joints exist at the wrist & hand (5)

Answer 1

A. Distal radio-ulnar
B. Radiocarpal
C. Carpometacarpal
D. Metacarpophalangeal
E: Interphalangeal

Question 2

What is the synovial classification of the distal radio-ulnar joint?

Answer 2

pivot or trochoid

Question 3

What is the synovial classification of the Interphalangeal joint?

Answer 3

hinge

Question 4

What is the synovial classification of the radiocarpal and metacarpophalangeal joints?

Answer 4

ellipsoidal or condyloid

Question 5

Describe the carpometacarpal joints and their classifications?

Answer 5

1: First/Thumb: sellar or saddle
2: 2nd-5th digits: plane or gliding
Carpometacarpal joints are between the carpal bones and metacarpals

Question 6

P, D, A, I Abductor digiti minimi

Answer 6

P: pisiform
D: ulnar side of base of proximal phalanx of 5th digit
A: abducts 5th digit
I: deep branch ulnar n. (C8-T1)

Question 7

P, D, A, I Abductor pollicis brevis

Answer 7

P: transverse carpal lig
D: radial side of base of proximal phalanx of thum and tubercle of trapezium
A: abducts thumb
I: recurrent branch of median n. (C6-T1)

Question 8

P, D, A, I Adductor pollicis

Answer 8

P: capitate & 2nd and 3rd metacarpals
D: proximal phalangeal bases and dorsal digital expansions of 2nd-4th digits
A: adducts thumb
I: deep branch ulnar n. (C8-T1)

Question 9

P, D, A, I Dorsal interossei

Answer 9

P: adjacent sides of metacarpals
D: proximal phalangeal bases and dorsal digital expansions of 2nd-4th digits
A: abducts & flexes (MCP) and extends digits 2-4 (interphalangeal)
I: deep branch ulnar n. (C8-T1)

Question 10

P, D, A, I Flexor digiti minimi brevis

Answer 10

P: hamate
D: ulnar side of base of proximal phalanx of 5th digit
A: flexes 5th digit (MCP)
I:deep branch ulnar n. (C8-T1)

Question 11

P, D, A, I Flexor pollicis brevis

Answer 11

P: transverse carpal lig & trapezium
D: radial side base of proximal phalanx of thumb (Deep head blends wit opponens pollicis)
A: flexes thumb (MCP)
I: recurrent branch of median nerve (Superficial head; C6-T1) & deep branch of ulnar n (deep head; C8-T1)

Question 12

P, D, A, I Lumbricals

Answer 12

P: tendons of flexor digitorum profundus
D: radial side of dorsal digital expansions of digits 2-5
A: flexes MCP & extends interphalangeal joints of digits 2-5
I: deep branch of ulnar n. (3rd & 4th lumbs C8-T1) & median n (1st & 2nd lumbs C7-T1)

Question 13

P, D, A, I Opponens digiti minimi

Answer 13

P: hook of hamate
D: ulnar margin of shaft of 5th metacarpal
A: opposition of 5th digit to thumb
I: deep branch ulnar n. (C8-T1)

Question 14

P, D, A, I Opponens pollicis

Answer 14

P: transverse carpal lig & trapzium
D: palmar surface of 1st metacarpal
A: opposition of thumb to 5th digit
I: recurrent branch of median n. (C6-T1)

Question 15

P, D, A, I Palmar interossei

Answer 15

P: palmar aspects of metacarpals 2, 4, & 5
D: dorsal digital expansions of digits 2, 4, &5
A: adducts & flexes (MCP) and extends (interphalangeal) digits 2, 4, & 5
I: deep branch of ulnar n. (C8-T1)

Question 16

What are the 2 ligaments of the wrist & hand?

Answer 16

1: transverse carpal lig
2: the collateral ligaments of the MCP joints

Question 17

Describe the function and attachments of the collateral ligaments of the MCP joints?

Answer 17

F: stabilize MCP joints
A: from head of metacarpals to base of adjacent proximal phalanx

Question 18

Describe the function and attachents of the transvers carpal ligament?

Answer 18

F: prevents bowstringing of the tendons of FPL, FDS, & FDP mm.
A: from pisiform & hook of hamate to scaphoid & trapezium

Question 19

How are the 8 carpal bones organized?

Answer 19

Proximal row: scaphoid, lunate, triquetum, pisiform
Distal row: Trapezium, trapezoid, capitate, hamate
*from radial to ulnar
Some Lovers Try Positions
That They Cant Handle

Question 20

What is the role of the transverse carpal ligament in carpal tunnel syndrome? What structures can be damaged?

Answer 20

Transverse carpal ligament is the superior palmar border of the carpal tunnel w/ carpal bones as inferior palmar border
Compression from inflammation of the ligamentous sheaths running through the carpal tunnel can entrap the median n. running through and cause sensory and even motor damage

Question 21

Name the muscles that form the tendons running in the 6 compartments formed by the extensor retinaculum?

Answer 21

1: EPB, APL, EPL
2:ECRB & ECRL
3: EPL
4: ED & EI
5: EDM
6: ECU

Question 22

What are the 9 extrinsic muscles of the hand?

Answer 22

Flexors: FDS, FDP, FPL
APL
Extensors: ED, EDM, EPB, EPL, EI

Question 23

What are the compartments of the 18 intrinsic muscles of the hand?

Answer 23

Thenar, 3: APB, FPB, Opponens pollicis
Hypothenar, 3: abductor digiti minimi, flexor digiti minimi, opponens digiti minimi
Adductor pollicis (transverse & oblique head)
Central/Lumbricals, 4: proximal attx @ tendons of FDP & distal attx @ radial dorsi of digital expansions
Interossei, 7: 4 dorsal interossei (DAB) & 3 palmar interossei (PAD)