Arm and Cubital Fossa Flashcards
Elbow joint is composed of ?
humeralradial joint and the humeralulnar joint and proximal radial-ulnar joint
Humeralradial joint is what type of joint?
condyle
Humeralulnar joint is what type of joint?
hinge
What are the movements of the humeralradial joint?
extension
flexion
abduction
adduction
circumduction(limited)
What are the movements of the humeralulnar joint?
flexion and extension
Proximal radial-ulnar joint is what type of joint?
pivot joint
What are the movement of the proximal radial-ulnar joint?
pronation and supination
Radial collateral ligament is medial or lateral?
lateral
Ulnar collateral ligament is medial or lateral?
medial
What is the articulate capsules in the elbow joint function?
-surrounds the whole joint
-provides ability to be able to flex and extend(ulna)
-located at the capitulum of the humerus to head off the radius(radius)
Where does the ulnar collateral ligament attach to the humerus?
medial epicondyle up to the coronoid process and olecranon of the ulna
What is a characteristic of the ulnar collateral ligament?
- it is a triangular ligament and divides into (anterior,oblique and posterior)
Where does the radial collateral ligament attach to the humerus?
lateral epicondyle upto the radial notch of the ulna and anular ligament
Which Collateral ligament is weaker? Radial or Ulna
Radial collateral ligament
What is a characteristic of the radial collateral ligament?
provides posterior, lateral stability
What is the ligament present in the humeral-ulnar joint?
capsule and ulnar collateral ligament
What is the ligament present in the humeral-radial joint?
capsule and radial collateral ligament
What is the ligament present in the proximal radial-ulnar joint ?
Anular ligament
Where does the anular ligament attach to ?
radial head and radial notch of the ulna
What is a characteristic of the anular ligament?
keeps radial head attach to radial notch
-allows pronation and supination(pivot)
Arm is divided into what 2 compartments?
anterior(flexor)
posterior (extensors)
What is the structure that divides the arm compartment into anterior and posterior compartment?
intermuscular septa
Intermuscular septa divides into?
lateral and medial
Intermuscular septa attaches to…?
medially and laterally to the muscles
Anterior compartment of the arm are primarly?
flexors of the forearm at the elbow
Anterior compartment of the arm are secondarly?
flexors of the arm at the shoulder(related to biceps and coracobrachialis)
What is the function of the anterior compartment of the arm?
-flex forearm and supination (using biceps brachi only)
The anterior compartment of the arm is innervated by which nerve?
Musculocutaneous nerve
What is the blood supply of the anterior compartment of the arm?
brachial artery and its muscular branches
Where does the brachial artery come from?
brachialis plexus
What are the muscles involved in the anterior compartment?
biceps brachi
brachialis
coracobrachialis