Hand and Wrist Anatomy

Question 1

pisiform is a sesamoid bone in which tendon?

Answer 1

flexor carpi ulnaris

Question 2

Sesamoid bones in the thumb act as what?

Answer 2

tunnel

Question 3

what is the key articular bone in the wrist?

Answer 3

radius

Question 4

3 parts of the scaphoid, where is it most likely fractured?

Answer 4

articular
waist (common fracture)
tubercle

Question 5

what is the purpose of the retinaculum?

Answer 5

retains tendons to prevent bridging

Question 6

what tendon in the wrist is not held under the retinaculum?

Answer 6

palmaris longus

Question 7

the anatomical snuff box, what is proximal? what is the floor?

Answer 7

proximal: radioal styloid
floor: scaphoid

Question 8

When do carpal bones start to ossify?

Answer 8

age 2

Question 9

which bones ossify first? small or large?

Answer 9

large ones like the capitate

Question 10

2 joints of the wrist?

Answer 10

radio carpal

intercarpal condylar

Question 11

What are the biaxial movements?

Answer 11

flex/ect

rad/uln deviation

Question 12

rotation at wrist?

Answer 12

Nope

Question 13

where is the synovial ellipsoid joint?

Answer 13

radiocarpal joint

Question 14

Why is radial deviation less than ulnar deviation?

Answer 14

radial deviation is blocked by radial styloid process?

Question 15

Why is flexion more than extension?

Answer 15

blocked by distal radius

Question 16

what’s the only tendon that attaches to carpal bones?

Answer 16

flexor carpi ulnaris

Question 17

what is the most commonly subluxed carpal?

Answer 17

lunate

Question 18

consequence of scaphoid fracture?

Answer 18

avascular necrosis due to fracture at waist and lack of blood supply

Question 19

colles fracture?

Answer 19

fracture at distal radial head making dinner fork deformity

Question 20

what kind of joint is the carpometacarpal joint of the thumb? what does it allow?

Answer 20

saddle joint

allows opposition

Question 21

what are the movements allowed in the interphalangeal joints?

Answer 21

flex and ext only

Question 22

movements allowed in metacarpophalangeal joints?

Answer 22

flex/ext

abd/add

Question 23

what is the deep transverse metacarpal ligaments? where does it not attach?

Answer 23

limits finger abduction

doesn’t attach to thumb

Question 24

What is the volar and dorsal plate?

Answer 24

fibrocartilaginous plate to expand surface area for articulation

Question 25

Collateral ligaments of phalanges are taut when?

Answer 25

in flexion

Question 26

What is damaged in:
swan neck
boutonniere

Answer 26

Swan neck: volar plate

boutonniere: dorsal plate