Bones of the Pectoral Girdle
Name the bony features of the scapula.
spine, acromion process, coracoid process, superior border, medial border, suprascapular notch, superior angle, inferior angle, lateral angle, glenoid fossa (or glenoid cavity), subscapular fossa, supraspinous fossa, infraspinous fossa, supraglenoid tubercle, infraglenoid tubercle
How does the pectoral girdle permit mobility?
1. It allows the scapula to move freely across posterior aspect and allows the arm to move with 2. The shallowness of the glenoid cavity permits the shoulder a very wide range of motion
On the clavicle, what does the acromial end articulate with?
Acromion process of the scapula
What do the bones of the pectoral girdle serve as?
Attachment sites for many muscles that help move the upper extremities
What kind of bone is the scapula?
Broad and flat triangular bone
What is another name for clavicles?
Collarbones
What is the clavicle?
Extends between the manubrium of the sternum and the acromion process of the scapula
When the glenoid cavity articulates with the head of the humerus, what does it form?
Glenohumeral joint
Where does the glenoid cavity articulate with?
Head of the humerus
On the clavicle, what does the sternal end articulate with?
Sternum
What do the pectoral girdle articulate with?
It articulates with the trunk and supports the upper limbs.
Acromion is always ___________
Lateral
Where is the glenoid cavity located?
Lateral aspect of the bone
What does the pectoral girdle consist of?
Left and right clavicles and the left and right scapulae.
The clavicle is the only direct connection between?
Pectoral girdle and the axial skeleton
What is along the posterior aspect of the scapula?
Ridge of bone, called the spine of the scapula.
What shape is the clavicle?
S shaped bone
The scapula contains _________ large projections, which provide areas for _______
Several, muscular and ligamentous attachment
What does the scapula form?
Shoulder blade
What is another name for scapulae?
Shoulder blades
Name the bony features of the clavicle.
Sternal end, acromial end, conoid tubercle, and costal tuberosity
