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Chapter 1: Functional Anatomy and Biomechanics - Elbow Region
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Humeroulnar Joint
Distal end of humerus articulates with proximal end of ulna
Trochlea and trochlear notch face ant at 45 degree angle - allows space between ulna and humerus during flexion
Humeroradial Joint
Distal end of humerus (capitulum) articulates with concave oval facet of proximal radius
Radioulnar Joint
Proximal
: radial head is ovoid and cone shaped
Medial radius artiuculates with lateral notch of ulna
Distal
: convex ulna articulates with concave radius (opposite to proximal articulation)
Elbow Joint Capsule
Encloses entire joint complex
Thin aneriorly and posteriorly
Continues medially with UCL and laterally with RCL
Elbow Ligaments: UCL
Triangular shaped, consists of 3 parts
Reinforces humeroulnar joint medially
Elbow Ligaments: RCL
Fan shaped
Runs from lateral epicondyle to annular ligament
Reinforces humeroulnar joint laterally
Elbow Ligaments: AnnularĀ
Osteofibrous ring attched to medial ulna and encircles radial head
Inner surface lined with fibrocartilage
Protects radial head, especially in semiflexion (very unstable)
Taught in extremes of pronation and supination
Elbow Ligaments: Quadrate
Extends from radial notch (ulna) to the neck of the radius
Reinforces inferior joint capsule
Maintains radial head in opposition to ulna
Limits amount of spin in supinatio and pronation
Elbow Ligaments: Distal Radioulnar
Anterior and posterior portions
Primarily strengthens capsule
Olecranon Bursa
Located on post aspect of elbow over olecranon processĀ
Elbow Joint Blood Supply
Brachial artery
Ant ulnar recurrent artery
Post ulnar recurrent artery
Radial recurrent artery
Middle collateral branch of deep brachial artery
Author
dmshaw9
ID
297897
Card Set
Chapter 1: Functional Anatomy and Biomechanics - Elbow Region
Description
NPTE: Chapter 1
Updated
2015-03-08T23:11:48Z
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