Upper Extremity Skeleton Flashcards
What is the principal purpose of the upper limb?
To manipulate and position the hand
The collarbone acts as a strut to hold what in place?
The arm
The clavicle is usually fractured from what?
A fall onto an outstretched hand
What are the common fracture points of the clavicle?
In the middle (away from bonier acromial and sternal ends)
What is the only bony connection between the axial and appendicular skeletal regions?
The sternoclavicular joint
What are the features you need to know on the clavicle?
Acromial end- lateral
Sternal end- medial
Costal tuberosity-medial
Conoid tubercle- lateral
Parts of the scapula
Acromion process
Glenoid cavity
Spine
Bones of the Upper Limb
Humerus- arm
Ulna- forearm
Radius- forearm
Carpal bones- wrist
Metacarpal bones- palm
Phalanges- fingers
The radius sits _______ and the ulna sits _______ in a supinated position.
Laterally; medially
Structures of the Humerus
- Head
- Surgical neck
- Medial epicondyle (funny bone)
What is the funny bone feature on the humerus?
The medial epicondyle
What is the purpose of the olecranon fossa on the posterior aspect of the humerus?
The ulna hooks in here. Elbow hinge created.
Is the olecranon on the ulna a proximal or distal structure?
Proximal
Ulna= _____ side
Radius= _____ side
Pinky; thumb
This orientation is maintained regardless of wrist position
Proximal Carpal Bones from lateral to medial
Scaphoid
Lunate
Triquetrum
Pisiform
