Pectoral Girdle Flashcards
How many bones in the pectoral girdle
Two
What is the bone of the clavicle like
Slender doubly curved
What does the clavicle act as
A brace to hold arm away from top of thorax
What does the clavicle prevent
Shoulder dislocation
The clavicle articulates with what medically
Sternum
The clavicle articulates with what laterally
Scapula
If the clavicle were to break what would happen
The whole shoulder caves in medically
Shoulder blade
Scapula
What is the bone of the scapula like
Triangular and wing shaped
The clavicle and and scapula combine at what
The acromioclavicular joint at the acromion
The scapula articulates with the arm at what
Glenoid cavity
Parts of the scapula
Coracoid process and suprascapular notch
Glenoid cavity
What is the function of the coracoid process
Anchors some of the muscles of the arm
What is the function of the suprascapular notch
Serves as a nerve passageway
Points over the top of the shoulder
Coracoid process
How is the scapula connected the axial skeleton
Held in place by trunk muscles
The shoulder girdle allows for what
Free movement to the upper limb and very light
What is the drawback of the shoulder girdle
Easily dislocated
Three reasons that the shoulder girdle allows free movement to upper limb
- Attaches to axial skeleton out only one point—sternoclavicular
- Loose attachment of scapula allows it to slide back and forth against thorax when muscles act
- Glens is cavity is shallow and shoulder joint is poorly reinforced by ligaments
Collarbone
Clavicle
