Identify the basic plan of the carpus, hand and fingers, noting in particular the detail of the scaphoid and lunate bones Flashcards
What bone is sue pointing at?
1st metacarpal
What is Sue pointing at?
The styloid processes of the radius and ulna
Where are proximal interphalangeal joints located?
Between the proximal phalanx and middle phalanx of the digits
What carpus bone is sue pointing at?
trapezium
What bones are distal to the metacarpals?
Phalanges
Where are interphalangeal joints located?
Between phalangeals
What bones occupy the distal row of the carpus?
- Trapezium
- Trapezoid
- Capitate
- Hamate
Which joints articulates the carpus bones to the metacarpal bones?
carpo-metacarpal joints
What is the purpose of the pisiform bone?
- sits within the tendon of flexor carpi ulnaris
- helps lift the tendon away from other carpal bones
Why is the radius much bigger at the distal end than it is at the proximal end?
The radius is what articulates with the hand.
Which joints articulate the metacarpals and phalangeals?
metacarpo-phalangeal joints
What is sue pointing at?
The dorsal tubercle of the radius
(Lister’s tubercle)
What shape is the Lunate?
Crescent/moon shaped
What joint does the radius (and ulna) form with the carpal bones of the wrist?
The condyloid joint
What bone is sue pointing at?
3rd metacarpal
When referring to the anatomy of the distal forearm and hand, what terms do we use instead of “median and lateral”?
Why are they replaced?
lateral side: radial side
median side: ulna side
due to supination and pronation
What carpus bone is under the thumb?
Trapezium is under the thumb
What carpus bone is sue pointing at?
Triquetral
What carpal bone is sue pointing at?
Lunate
What bone is sue pointing at?
5th metacarpal
What carpus bone is sue pointing at?
Pisiform
(on top of triquetral)
What bones are distal to the carpal bones?
Metacarpals
How many phalanges make up digits 2-5
3
(proximal, middle, distal)
What movements occur at the metacarpo-phalangeal joints?
flexion
extension
abduction
adduction
