Arm and elbow Flashcards
Where does the thoracodorsal nerve come from?
Posterior cord
What can be injured in supracondylar fractures?
brachial artery
median nerve
What are the two articulations at the elbow?
Humeroulnar
Humeroradial
What reinforces the joint capsule medially and laterally?
Medially- ulnar collateral ligament
Laterally- radial collateral ligament
What does the annular ligament of the radius do?
Keeps the radial head in place to allow pronation and supination
What are the elbow flexors?
Biceps brachii
Brachoradialis
Brachialis
Which elbow flexor is innervated by the radial nerve?
Brachoradialis
What is an anterior arm muscle but does NOT flex the elbow?
Coracobrachialis muscle
What is triceps brachii innervated by?
Radial nerve
Why does the elbow joint have good congruity?
The trochlear notch of the ulna and the trochlea of the humerus have a good fit
What can cause posterior dislocation of the elbow?
FOOSH
hyperextension
What nerve can be injured in a posterior dislocation?
Ulnar nerve
Why does ‘pulled elbow’ occur?
In young children, the annular ligament is weak allowing subluxation/dislocation of the radial head
