3 Bones (Carpals, Metacarpals, Phalanges)

Question 1

What are the carpal bones?

Answer 1

Proximal row (lateral to medial):
Scaphoid
Lunate
Triquetrum
Pisiform

Distal row (lateral to medial):
Trapezium
Trapezoid
Capitate
Hamate and hook of the hamate

Question 2

Which carpal bones articulate with the radius to form the radioulnar joint?

Answer 2

The three lateral and proximal carpals (scaphoid, lunate and triquetrum) articulate with the distal end of the radius and the articular disc of the radius to form the radioulnar joint

the pisiform is on an anterior plane tot he other proximal carpal bones and articulates only with the triquetrum

Question 3

Which are the more mobile and which are the more rigid carpals?

Answer 3

The proximal row is more mobile, and the distal row is more tightly ligamentously bound and more rigid

Question 4

What is the joint between the carpals and the metacarpals?

Answer 4

the carpometacarpal joint

Question 5

What is the structure of the metacarpal bones?

Answer 5

Base articulates with carpal bones

Head articulates with phalanges

Question 6

What is the structure of the phalanges?

Answer 6

Base at proximal end

Head at distal end

Question 7

What are the joints between the phalanges called?

Answer 7

interphalangeal joints (proximal, middle and distal)