Appendicular Skeleton: Forearm, Wrist, Hand

Question 1

Forearm: Pronation and Supination

Answer 1

Supination: radius parallel to ulna
–SAP: supination=”hold soup in hand”

Pronation: radius crossed over ulna

Question 2

Forearm: Radius and Ulna

Answer 2

Ligaments that anchor the wrist attach to the radial and ulnar styloid processes

Question 3

Radius

Answer 3

Primary forearm bone that contributes to wrist

Few landmarks:

• -head
• -radial tuberosity
• -shaft
• -styloid process
• -ulnar notch

Question 4

Wrist Fractures

Answer 4

Typically fracture distal radius while catching yourself during a fall (FOOSH!)
Common in older females
“Dinner fork” presentation
Can lead to nerve damage and dysfunction

Question 5

Carpals

Answer 5

8 carpals make up wrist. Arranged (roughly) in 2 rows. Gliding movements at articulations, wrist is very flexible

Scaphoid is most frequently fractured

CAN NOT SEE Pisiform in posterior view

Question 6

Carpals: Mnemonic

Answer 6

(R to L clockwise) Scaphoid, Lunate, Triquetrum, Pisiform, Hamate, Capitate, Trapezoid, Trapezium

“So Long To Pinkie, Here Comes The Thumb”

Question 7

Metacarpals and Phalanges

Answer 7

5 metacarpals, each w/ a head, shaft, and base

Numbered I-V, thumb to little finger
Digits II-V have 3 phalanges: proximal, middle, and distal
Digit I (pollex or thumb) has 2 phalanges: proximal and distal

Each digit has 1 metacarpal