Elbow and Forearm Complex Flashcards
Ligaments of radioulnar joint?
Radial collateral, ulnar collateral, annular, quadrate, oblique cord,interossious membrane, anterior and posterior radio-ulnar ligament
Where is the annular ligament and what does it do?
encircles head of radius and holds it against radial notch
Where is the quadrate ligament and what does it do?
reinforces inferior aspect of capsule and keeps radial head in radial notch
Where is the oblique cord and what does it do?
diagonal between radius and ulna and prevents them from separating
Where is the interosseous membrane and what does in do?
membrane between radius and ulna to keep bones near each other with movement.
Where are the anterior and posterior radioulnar ligaments and what do they do?
At the wrist between radius and ulna, keeps them together.
What do the radial and ulnar collateral ligaments do?
They are on their respective sides of wrist to check movement in that direction (radial collateral checks medial movement, ulnar checks lateral movement)
Flexors of elbow
biceps, brachialis, brachioradialis, pronator teres
Extensors of elbow
triceps, anconeus
Supinators
biceps, supinator, brachioradialis
Pronators
pronator teres, pronator quadratus, brachioradialis
Where is the brachialis?
Whole lower half of humeral shaft to insert on ulna
Where is the brachioradialis?
Distal portion of humerus extending along radius to insert at base of styloid process of radius.
It is a supinator and a pronator due to its location, it effectively pulls the forearm back to neutral.
Where is the pronator teres?
Runs from ulnar (medial) side of humerus across to radial (lateral) side of forearm
Where is the pronator quadratus?
essentially, anterior aspect of wrist. Pulls ulnar to radial side.
