Pectoral Girdle Flashcards
how many bones are in the pectoral girdle?
2
what is the bone of the clavicle like?
slender, doubly curved
what does the clavicle act as?
a brace to hold the arm away from the top of the thorax
what does the clavicle prevent?
shoulder dislocation
the clavicle articulates with what medially
the sternum
the clavicle articulates with what laterally
scapula
if the clavicle were to break what would happen?
the whole shoulder caves in medially
shoulder blade
scapula
what is the bone of the scapula like?
triangular and wing shaped
the clavicle and the scapula combine at what
the acromioclavicular joint at the acromion
the scapula articulates with the arm at what
glenoid cavity
parts of the scapula
caracoid process and suprascapular notch
glenoid cavity
what is the function of the coracoid process?
anchors some of the muscle of the arm
what is the function of the suprascapular notch?
serves as a nerve passageway
points over the top of the shoulder
carocoid process
how is the scapula connected to the axial skeleton?
sternoclavicular joint
the shoulder girdle allows for what
the joint to slide back and forth against the thorax as muscles act
what is the drawback of the shoulder girdle?
very easily dislocated
three reasons that the shoulder girdle allows free movement to upper limbs
- each shoulder girdle attaches to the axial skeleton at the sternoclavicular joint
- loose attachment of the scapula allows it to slide back and forth against the thorax as muscles act
- glenoid cavity is shallow, and the shoulder joint is poorly reinforced by ligaments
collarbone
clavicle
