Lecture 6 - Upper Limb (Extremity) Flashcards
Each upper limb consists of __ bones including the humerus, ulna, radius, carpals, metacarpals, and phalanges
30
Extends from shoulder to elbow to wrist and contains only the humerus
The brachium (or arm proper)
Extends from the elbow to wrist and contains two bones, the radius and ulna; in anatomical position, the radius is lateral to the ulna.
The antebrachium (or forearm)
Contains eight small bones arranged in two rows
Carpus (or wrist)
Contains 19 bones in two groups: 5 metacarpals int he palm and 14 phalanges in the fingers
The manus (or hand)
The longest and largest bone of the upper limb
The humerus
The humerus articulates ______ with the scapula and ______ distally at the elbow with both the radius and ulna
proximally ; distally
Rounded ______ articulates with glenoid fossa of scapula
head
Lateral projection distal to the neck and site of muscle attachment-bony!
Greater tubercle
For muscle attachments
Lesser tubercle
A rough area on the shaft that is the insertion for the deltoid muscle
Deltoid tuberosity
A later condyle is shaped somewhat like a wide tire that articulates with head of radius - lateral elbow bump
Capitulum
A medial condyle is pulley-like and articulates with ulna
Trochlea
Immediately proximal to these condyles, the humerus flares out to form two bony processes, the lateral and medial epicondyles - attachment of forearm muscles. The medial epicondyle protects the ulnar nerve, which passes close to the surface; this epicondyle is popularly known as the “funny bone.”
Lateral & Medial epicondyles
The posterior pit, the _________ ________ - depression for olecranon of ulna.
Olecranon fossa