Shoulder Joint Flashcards
Which 3 bones make up the shoulder joint?
Clavicle
Scapula
Humerus
Which 3 muscles attach to the greater tubercle of the humerus?
Supraspinatous
Infraspinatous
Teres minor
Which muscle attaches to the lesser tubercle of the humerus?
Subscapularis
In what structure does the tendon of the long head of biceps run along on the humerus?
Intertubular sulcus
Where is the surgical neck found in the humerus?
Between the tubercles and the shaft of the humerus
Which muscle lies on the costal surface of the scapula?
Subscapularis
What structures arise from the posterior scapula?
Acromion process
Spine of the scapula
Which projection arises from the anterior scapula?
Coracoid process
Which 2 muscles originate from the coracoid process?
Coracobrachialis
Biceps brachii
Which muscle attaches to the coracoid process?
Pectoralis minor
Which part of the scapula can the supraspinatus muscle be found?
Superior to the scapula spine
Which part of the scapula can the infraspinatus muscle be found?
Inferior to the scapula spine
Which muscle attaches to the supraglenoid tubercle on the scapula?
Long head of the biceps brachii
Which muscle attaches to the infraglenoid tubercle on the scapula?
Long head of the triceps brachii
What is the definition of an intrinsic muscle of the shoulder?
Muscle which originates from the scapula or clavicle and attaches to the humerus
What is the definition of an extrinsic muscle of the shoulder?
Originates from the torso and attaches to the bones of the shoulder
Where does the deltoid muscle originate from?
The scapula and clavicle
Where does the deltoid muscle attach on the humerus?
Deltoid tuberosity
Which nerve innervates the deltoid muscle?
Axillary nerve
What movements does the anterior deltoid allow?
Flexion
Adduction
Medial rotation
What movements does the middle deltoid allow?
15-90 degree abduction of the shoulder
What movements does the posterior deltoid allow?
Extension of the shoulder
What nerve innervates the teres major?
Lower subscapular nerve
Name the 4 rotator cuff muscles
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
What movement does infraspinatus allow?
Lateral rotation of the shoulder
What nerve innervates the infraspinatus muscle?
Suprascapular nerve
What movement does supraspinatus allow?
0-15 degrees abduction of the shoulder
What movement does subscapularis allow?
Medial rotation of the shoulder
What movement does teres minor allow?
Lateral rotation of the shoulder
What nerve innervates the supraspinatus muscle?
Suprascapular nerve
What nerve innervates the teres minor muscle?
Axillary nerve
Name the extrinsic muscles of the shoulder joint
Latissimus dorsi Trapezius Rhomboid major Rhomboid minor Levator scapulae
What is the function of the levator scapulae?
Elevates scapula
What are the 3 intracapsular ligaments called?
Superior glenohumeral
Middle glenohumeral
Inferior glenohumeral
What is the name of the tendon which spans the 2 tubercles of the humerus?
Transverse humeral ligament
What is the name of the ligament which forms the coracoacromial arch?
Coracoacromial ligament
What is the name of the ligament which runs from the coracoid to the humerus?
Coracohumeral ligament
Name the 4 bursae in the shoulder
Subcoracoid
Subdeltoid
Subacromial
Supscapula
Which bursa is most commonly affected in bursitis of the shoulder?
Subacromial
