Upper Extremity Overview and Osteology

Question 1

Sternum components

Answer 1

Manubrium, body, and xiphoid

Question 2

Important parts of scapula

Answer 2

Spine of scapula
Acromion process
Supraspinous fossa
Infraspinous fossa
Superior border
Suprascapular notch
Medial/Vertebral border
Lateral/Axillary border
Inferior Angle

Question 3

Important parts of humerus

Answer 3

Humeral head
Greater tubercle
Lesser tubercle
Intertubercular groove
Deltoid tuberosity
Anatomical neck
Surgical neck

Question 4

Articular surfaces of distal humerus and what is articulates with

Answer 4

Capitulum (lateral)
•Articulates with the radius
Trochlea (medial)
•Articulates with ulna

Question 5

How many condyles on distal humerus and what are they

Answer 5

Two epicondlyes

–Medial & Lateral

Question 6

How many fossae on distal humerus and what are they?

Answer 6

Three Fossae
–Radial
–Coronoid
–Olecranon

Question 7

Where is the groove for ulnar nerve?

Answer 7

distal humerus

Question 8

Is radius or ulna longer proximally?

Answer 8

ulna

Question 9

Is radius or ulna longer distally?

Answer 9

radius

Question 10

How are radius and ulna joined?

Answer 10

interosseous membrane

Question 11

What do both radius and ulna articulate with?

Answer 11

humerus

Question 12

How many rows of carpal bones are there?

Answer 12

2 rows

Question 13

proximal row of carpals and what do they approximate with?

Answer 13

Scaphoid, Lunate, Triquetrum, Pisiform (Lat-Med), approximate with radius

Question 14

distal row of carpals and what do they approximate with?

Answer 14

Hammate, Capitate, Trapezoid, Trapezium (Med-Lat), approximate with metacarpals

Question 15

Where is the midline of the hand?

Answer 15

through the middles of 3rd digit

Question 16

Bones in digits 2-5

Answer 16

Metacarpal (#10)
Proximal Phalanx (#11)
Middle Phalanx (#12)
Distal Phalanx (#13)

Question 17

Bones in thumb

Answer 17

Metacarpal (#10)
Proximal Phalanx (A)
Distal Phalanx (B)