ARM, Cubital fossa, Movements of elbow Flashcards
Has two heads the long and the short head
Biceps brachii
Passes from lesser to greater tubercle of the humerus and converts the intertubercular groove into a canal for the tendon of the long head of the triceps
Transverse humeral ligament
When elbow is extended, what is the flexor of the elbow?
As elbow flexion is 90 degrees or more, BLANK with the forearm in supination produces flexion
With forearm in pronation, BLANK are primary supinator of forearm
Biceps
Bicipital aponeurosis?
Runs from bicep tendon into cubital fossa
Only pure elbow flexor
Called the DRINKING MUSCLE
Brachialis
Flexes and adducts the arm and stabilizes the shoulder joint?
Coracobrachialis
Chief extensor of the elbow
Has a long head, lateral head, and medial head
Tricep muscle
Crosses the shoulder joint, helps stabilize the adducted joint by serving as a shunt muscle, AKA resists inferior displacement of the head of the humerus with deltoid and coracobrachialis
Long head of the triceps
Continuation of the axillary artery
Provides main arterial supply of the arm
Begins at inferior border of teres major and ends in the cubital fossa, where it then divides into radial and ulnar arteries
Relatively superficial
Brachial artery
The brachial artery accompanies what?
Median nerve inferolaterally
Branches of brachial artery?
Profunda brachii artery (deep artery of arm)
Superior/ Inferior ulnar collateral artery
What are the veins of the arm?
Cephalic
Basilic
Brachial
Begins at elbow union of ulnar and radial arteries and ends by merging with basilic vein to form axillary vein?
Brachial vein
Nerves of the arm?
Median
Ulnar
Musculotaneous
Radial
This nerve is formed in the axilla
Median nerve
This nerve distally passes anterior to the insertion of the teres major of medial side of brachial artery
Pierces medial intermuscular septum
Ulnar nerve
This nerve pierces coracobrachialis then continues distally between brachialis and biceps.
After piercing: it emerges lateral to the biceps as lateral cutaneous nerve of the forearm
Musculotaneous
This nerve supplies the muscles in the posterior compartment of the arm and forearm.
Posterior to brachial artery, medial to humerus, and anterior to long head of triceps
Divides into deep and superficial branches in cubital fossa
Radial nerve
Contents of the cubital fossa?
Terminal part of brachial artery Radial and ulnar arteries Biceps brachii tendon Deep accompanying veins Median nerve radial nerve
Superiorly boundary of Cubital fossa?
Imaginary line connecting medial and lateral epicondyle
Medially boundary of Cubital fossa?
Pronator teres
Laterally boundary of Cubital fossa?
brachioradialis
Floor of Cubital fossa?
Brachialis and supinator
Roof of Cubital fossa?
Continuity of brachial and antebrachial fascia
Elbow joint characteristics?
Hinge synovial
Flexion and extension occur here
Pivot synovial, Allows for movement of the head of radius on the ulna
Proximal radioulnar
Attaches to the ulna, forms a ring encircling the head of the radius
Anular ligament
Lateral, fan like
Holds head of radius in the radial notch of the ulna
Permits pronation and supination
Extends from lateral epicondyle and blends distally with annular ligament
Radial collateral ligament
Extends from the medial epicodyle to the coronoid process and olecrannon of the ulnar
Consists of 3 bands what are they?
Ulnar collateral ligament
Anterior- strongest
Posterior- weakest
Oblique- deepens socket for trochlea of humerus
Pivot type of synovial joint
Allows movement of the head of the radius of the ulna
Proximal (Superior) Radio-Ulnar joint
Ligaments within Proximal (Superior) radio-ulnar joint?
Anular- forms a ring that completely encircles the head of the radius
Sacciform recess of this joint