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Upper Extremities

ch 4

Upper limb structures are divided into 4 main groups 1. Hand & wrist 2. Forearm 3. Arm (Humerus) 4. Shoulder Girdle
How many bones are in the hand & wrist? 27
Hand and Wrist bones are divided into 3 groups: 1. Phalanges (fingers & thumb) 2. Metacarpals (palm) 3. Carpals (wrist)
How many Phalanges are on each hand? 14
How many Metacarpals are on each hand? 5
How many Carpals are on each hand? 8
Phalanges are: the most distal bones of the hand
Metacarpals are: the bones that make up the palm of the hand
Carpals are: the bones in the wrist
Each finger and thumb is called a digit
Each digit consists of two or three small bones called Phalanges
Digits are numbered starting with the thumb as 1, and ending w/ the little finger as 5
Digits 2-5 have ___ phalanges which are: 3, Distal, Middle, & Proximal
The thumb or the first digit has just ___ phalanges which are: 2, Proximal & Distal
Each Phalanx consists of 3 parts: Head (rounded distal) Body (shaft) Base (expanded & similar to the expanded base of the metacarpals)
Each Metacarpal is number the same way as the Digits
The Thumb (first digit) only has 2 phalanges, therefore the joint between them is ____________ Interphalangeal or IP Joint
Joint between the first Metacarpal and the proximal Phalanx of the thumb is called the _______ _______ Metacarpophalangeal Joint or first MCP
Fingers 2-5 have 3 phalanges therefore they have _____ joints each. 3
There are how many Carpal bones? 8
What are the names of the Carpal Bones? Scaphoid, Lunate, Triquetrum, Pisiform, Trapezium, Trapezoid, Capitate & Hamate
Created by: Ash_Nic
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