Lecture 8

Question 1

What side if the radius on?

Answer 1

“thumb side”
wider at wrist

Question 2

What side if the ulna on?

Answer 2

“pinky side”
has olecrenon at elbow

Question 3

Radius - proximal end

Answer 3

going from top to bottom –>
head, neck, radial tuberosity

Question 4

Radius - distal end

Answer 4

ulnar notch on medial side
styloid process on lateral side

Question 5

Ulna - proximal end

Answer 5

olecranon - trochlear notch - radial notch - coronoid process

Question 6

Ulna - distal end

Answer 6

head - styloid process (bump on medical (pinky side) of wrist

Question 7

what does the radius do?

Answer 7

stabalizes wrist joint

Question 8

Fibrous radioulnar ligaments (3)

Answer 8

interosseous membrane, annular ligament, radioulnar ligament

Question 9

What is the interosseous membrane? (3)

Answer 9

• fibrous sheath
• seperates forearm muscles into anterior and posterior compartments
• connects radius and ulna

Question 10

what is the annular ligament? (5)

Answer 10

• proximal ligament
• thick band surrounding head of radius
• connects radius with radial notch of ulna
• proximal radioulnar joint
• flexiblity allows for pronation and supination

Question 11

what si the radioulnar ligament? (3)

Answer 11

• distal ligament
• stabalizers
• distal radioulnar joint

Question 12

what are the three bone catagories of the hand/wrist? from wrist to finger tips

Answer 12

carpals - metacarpals - phalanges

Question 13

What is the saying to help remember the bones of the wrist

Answer 13

So long to pinky here comes the thumb

Question 14

carpals - proximal row (bottom) - lateral to medial

Answer 14

scaphoid -> lunate -> triquetrum (closest to outside of hand) -> pisiform

Question 15

carpals - distal row (top) - medial to lateral

Answer 15

hamate (hook fo hamate) -> capitate -> trapezoid -> trapezium (thumb one)

Question 16

which carpals/features of carpals can you not see formt he dorsal view of hand? (2)

Answer 16

hook of hamate and pisiform

Question 17

wrist joints (2)

Answer 17

radiocarpal joint, ulnocarpal joint

Question 18

Radiocarpal joint (3)

Answer 18

• synovial ellipsoid joint
• radius articulates with scaphoid, lunate and triquetrium
• only articular component of the wrsit joint

Question 19

ulnocarpal joint (3)

Answer 19

• ulna connects with lunate and triquetrum (pinky side)
• no direction of articulation
• common site of wrist injuries

Question 20

Metacarpals (3)

Answer 20

• numbered 1-5 (thumb to pinky)
• carpometacarpal joints (proximal/bottom)
• metacarpal phalngeal joint (distal/top)

Question 21

Phalanges (4)

Answer 21

• proximal interphalangeal joint
• distal interphalngeal joints
• seperated into proximal phalanx, middle phalanx and distal phalanx
• thumb only has proximal and distal phalanges

Question 22

Joints of the hand going from bottom of hand (not wrist) to finger tips (4)

Answer 22

carpometacarpal –> metacarpophalangeal –> proximal interphalangeal –> distal interphalangeal (thumb does not have distal interphalangeal joint)