Wrist and Palm

Question 0

Distal row of carpal bones:

Answer 0

Trapezium, trapezoid, capitate, hamate (articulate withe proximal row of carpals and distally with metacarpals

Question 1

Proximal row of carpal bones (lateral to medial):

Answer 1

Scaphoid, lunate, triquetrum, pisiform (all exccept pisiform articulate withe the radius and articular disc of ulna at the radiocarpal joint

Question 2

Wrist joint (synovial) is formed by _____ surface of proximal carpal bones and ______ surface of distal end of radius and the articular disc of the distal radioulnar joint.

Answer 2

Convex; concave

Question 3

Radial collateral ligament extends from the _______ of the radius to the ______.

Answer 3

Styloid process; scaphoid

Question 4

Ulnar collateral ligament joins the ______ of the ulna to the _____ and ______.

Answer 4

Styloid process; triquetrum; pisiform

Question 5

Carpal groove:

Answer 5

Ventral concavity of the wrist joint and it is converted into a tunnel by the flexor retinaculum

Question 6

What runs through the carpal tunnel?

Answer 6

Flexor digitorum superficialis tendons, Flexor digitorum profundus tendons, Median n., and Flexor pollicis longus tendon

Question 7

Structures that pass _______ to the flexor retinaculum pass through the carpal tunnel.

Answer 7

Posterior

Question 8

Which structures are anterior to the carpal tunnel?

Answer 8

Palmaris longus, flexor carpi ulnaris, ulnar n. and a.

Question 9

Carpal tunnel syndrome:

Answer 9

Decrease in the size of the carpal tunnel - due to arthritis, inflammation, and results in the compression of the median n. - numbness and both sensory and motor weakness

Question 10

The 3 synovial sheaths on the anterior wrist:

Answer 10

1. Ulnar bursa
2. Radial bursa
3. Tendon of flexor carpi radialis has a short sheath

Question 11

Ulnar bursa encloses:

Answer 11

All the superficialis and profundus tendons; continuous distally beyond the middle of the palm as the digital sheath only for the little finger

Question 12

Radial bursa encloses:

Answer 12

Tendons of flexor pollicis longus; extends distally to the terminal phalanx of the thumb

Question 13

Palmar aponeurosis is continuous with _____ and _____ fascia.

Answer 13

Thenar and hypothenar

Question 14

Proximally, the palmar aponeurosis is attached to the ________ and distally, it extends as 4 slips covering the flexor tendons of the medial 4 fingers & attaching to the base of each fibrous flexor sheath.

Answer 14

Palmaris longus

Question 15

Dupuytren’s contracture:

Answer 15

Fibrosis of the palmar aponeurosis resulting in shortening and thickening - could pull digits toward the hand

Question 16

Anatomical snuffbox contains:

Answer 16

1. Extensor pollicis longus
2. Extensor pollicis brevis
3. Abductor pollicis longus

Question 17

Branches of the ________ course thru the roof of the anatomical snuffbox and the ______ courses thru its floor.

Answer 17

Superficial radial n.; radial a.

Question 18

The median n. sends a palmar cutaneous branch ______ to the flexor retinaculum to supply most of the palm so there is no sensory impairment here.

Answer 18

Superficial

Question 19

Median n. is found ____ to the tendon of the flexor carpi radialis and ____ to the palmaris longus.

Answer 19

Medial; Lateral

Question 20

Ulnar n. damage produces:

Answer 20

1. Sensory impairment of the ant/post aspects of the medial part of the hand
2. Decreased abduction and adduction of fingers (INTEROSSEI)
3. Adductor pollicis paralysis
4. Paralysis of 2 medial LUMBRICALS