2 The Scapula Flashcards
What is the scapula commonly known as?
The shoulder blade
What does scapula articulate with?
The humerus
The clavicle
What is the joint between the scapula and humerus?
Glenohumeral joint
What is the joint between the sacpula and clavicle?
Acromioclavicular joint
What is the shape of the scapula?
Triangular flat bone
How many muscles attach to the scapula?
17
What is the anterior surface of the scapula called?
Costal surface (as faces towards the ribs)
What is the concave depression on the costal surface?
The subscapular fossa
Which rotator cuff originates from the subscapular fossa?
Subscapularis
Where is the coracoid process?
Superior-lateral costal surface
It lies just underneath the clavicle
Which muscles are attacheted to/originate from the coracoid process?
Pectoralis major - attach
Coracobrachialis - originate
Biceps brachii - originate
What does lateral border of scapula face?
Humerus
What is the name of the cavity where the glenohumeral joint is?
Glenoid fossa
What is the name of the tubercle directly above the glenoid fossa?
Supraglenoid tubercle
What is the name of the tubercle directly below the glenoid fossa?
Infragelnoid tubercle
What is attached to posterior surface of scapula?
SIT(notS) of rotator cuff muscles
What attaches to infraglenoid tubercle?
Long head of biceps brachii
What is the most prominent feature on posterior surface of scapula?
The spine
What are the two divisions of posterior surface of scapula?
Divided by the spine both convex
Above: supraspinous fossa
Below: infraspinous fossa (larger)
What muscle originates from supraspinous fossa?
Supraspinatus
What muscle originates from infraspinous fossa?
Infraspinatus
What is the projection off the spine of the scapula?
Acromion
What does acromion articulate with and arch over?
Articulates with clavicle -acromioclavicular joint
Arches over the glenohumeral joint
What type of joint is acromioclavicular joint?
Synovial gliding/plane
What type of joint is sternoclavicular joint?
Synovial saddle
