Shoulder and arm 2 Flashcards
What are the facets on the greater tubercle of the humerus?
Superior
Medial
Inferior
Which part of the humerus is most commonly fractured?
Surgical neck
What is the deltoid tuberosity of the humerus?
V shaped tubercle halfway down the humerus
What does the trochlea of the humerus articulate with?
Ulna
What does the capitulum of the humerus articulate with?
Radius
Which part of the ulna articulates with the humerus?
Coronoid process
Which part of the ulna is palpable at the elbow?
Olecranon
What are the three joints that make up the elbow joint?
- Radiocapitular
- Humeroulnar
- Superior radioulnar and inferior radioulnar
What kind of joint is the elbow joint?
Synovial/hinge
What are the three important ligaments of the elbow?
Radial collateral ligament
Ulnar collateral ligament
Anular ligament of the radius
Which ligament of the elbow is the most likely to be torn?
Ulnar collateral ligament
What are the muscles of the anterior compartment of the arm?
Biceps brachii
Coracobrachialis
Brachialis
What are the two distal attachments of the biceps brachii?
Radial tuberosity Deep fascia (bicipital aponeurosis)
Where does the short head of biceps originate from?
Coracoid process
Where does the long head of biceps originate from?
Supraglenoid tubercle
What is the function of biceps brachii?
Supinates then flexes forearm
Stabilises shoulder
What is the function of coracobrachialis?
Helps adduct and flex arm
Stabilises shoulder
What is the function of brachialis?
Main flexor of forearm
Where does brachialis insert into?
Coronoid process and ulnar tuberosity
Which nerve innervates the anterior compartment of the arm?
Musculocutaneous nerve (C5-C7)
Describe the posterior compartment of the arm
Triceps brachii
Which nerve innervates the posterior compartment of the arm?
Radial nerve
What is the function of triceps brachii?
Main extensor of forearm
also adduction of arm
What are the bursae of the elbow?
Subtendinous bursa
Intratendinous bursa
Olecranon bursa
Which direction is most common for shoulder dislocation?
Anterior
What risk would there be of fracturing the humerus?
Avascular necrosis of head
What risk would there be of fracturing the surgical neck of the humerus?
Damage to the axillary nerve (supplies the deltoid muscle)
What risk would there be of fracturing the medial epicondyle of the humerus?
The ulnar nerve would be at risk
