-
The bones in the upper limb can be divided into how many groups and what are they?
4- (1) hand and wrist, (2) forearm, (3) arm (humerus), and (4) shoulder girdle
-
How many bones are in the hand and wrist, and how are they divided?
- 27-
- 1. Phalanges (fingers and thumb) = 14
- 2. Metacarpels (palm) = 5
- 3. Carpels (wrist) = 8
-
Phalanges
- Phalanx (singular)
- The most distal bones of the hand, which comprise the digits. (14 bones/hand)
-
Metacarpals
Second group of bones in the hand, these bones make up the palm of each hand. (5 bones/hand)
-
Carpals
The third group of bones in the hand, consists of the bones in the wrist. (8 bones/hand)
-
Phalanx
- Singular of phalanges-
- Numbered 1-5, (Thumb-->Pinkie)
- Digits 2-5 are each composed of three phalanges. (distal, middle, & proximal)
- Digit 1 (thumb) composed of only 2. (distal & proximal)
- Each phalanx consists of 3 parts. (head, body, & base)
-
-
Forearm
Radius (lateral/thumb side) & Ulna (medial side)
-
Styloid Processes
Small conical projections, located at the extreme distal ends of both the radius and the ulna.
-
Ulnar Notch
A small depression on the medial aspect of the distal radius. The Head of the ulna fits into the UN to form the distal radioulnar joint.
-
Olecranon Process
Beaklike process of the proximal ulna. Can be palpated easily on the posterior aspect of the elbow joint.
-
Coronoid Process
Beaklike process of the proximal ulna. Not the olecranon.
-
Coronoid Tubercle
The medial margin of the coronoid process opposite the radial notch (lateral).
-
Trochlear Notch
The large concave depression, or notch, that articulates with the distal humerus. (semilunar notch)
-
Radial Notch
The small, shallow depression located on the lateral aspect of the proximal ulna.
-
Humeral Condyle
The expanded distal end of the humerus. The articular portion is divided 2 parts: the trochlea (medial condyle) and the capitulum (lateral condyle).
-
Trochlea
One of the parts of the articular portion of the humeral condyle. Shaped like a pulley or spool: it has two rimlike outer margins and a smooth depressed center portion (trochlear sulcus). It is located more medially and articulates with the ulna.
-
Capitulum
- One of the parts of the articular portion of the humeral condyle.
- (meaning "little head"), is located on the lateral aspect and articulates with the head of the radius
-
Lateral Epicondyle
The small projection on the lateral aspect of the distal humerus above the capitulum.
-
Medial Epicondyle
Larger and more prominent than the lateral and is located on the medial edge of the distal humerus.
|
|
