shoulder joint

Question 1

describe the humerus bony features

Answer 1

proximal; 
head 
surgical neck 
anatomical neck
greater tubercle 
lesser tubercle 
intertubercular sulcus 

mid shaft;
deltoid tuberosity
spiral (radial) groove

distal; 
medial and lateral supracondylar ridge 
trochlea
capitulum 
coronoid fossa
radial fossa
olecranon fossa
lateral and medial epicondyle

Question 2

describe articular surface of shoulder joint

Answer 2

glenohumeral joint, synovial multiracial ball and socket joint 3 degrees of freedom

covered in hyaline cartilage
humeral head larger than glenoid fossa
glenoid labrum deepens

Question 3

describe shoulder joint capsule

Answer 3

loosely surrounded has inferior fold

strengthened by ligaments and tendons of the rotator cuff muscles

Question 4

shoulder joint bursae

Answer 4

sub deltoid bursa
subcoracoid bursa
subacromial bursa

Question 5

what are the shoulder joint ligaments

Answer 5

superior, middle and inferior glenohumeral ligaments

transverse humeral

accessory ligaments- coracohumeral, coracoacromial

Question 6

what are the causes of shoulder joint instability

Answer 6

shallow glenoid fossa
large head of humerus
loose articular capsule

solutions- glenoid labrum, ligaments, rotator cuff muscles