Lecture 6 - Pectoral (Shoulder) Girdles Flashcards
The _______ attaches the bones of the upper limbs to the axial skeleton.
pectoral or shoulder girdle
The pectoral girdle is composed of…
the clavicle and scapula
The _____ ______ ______ is simply the articulation of the humerus and scapula.
True shoulder join
The _______ lies horizontally in the superior and anterior part of the thorax superior to the first rib and articulated with the sternum and the scapula.
clavicle (or collar bone)
The clavicle has a __ - shaped bone with ____ curves
S ; two
Medial curve convex __________ one concave anteriorly
anteriorly/lateral
The medial sternal end has a rounded, hammer like head, and articulates with the….
manubrium of the sternum and the sternoclavicular joint
The lateral end articulates with the…
acromion of scapula and the acromioclavicular joint.
The clavicle braces the shoulder. What would happen without it?
The chest muscles would pull the shoulders forward and medially
The _______ articulate with other bones anteriorly, but are held in place posteriorly only by complex shoulder and back musculature.
scapulae
The scapula or should blade articulates with the….
clavicle and the humerus
What shape is the scapula?
Triangular in shape
A large process on the posterior of the scapula that ends laterally as the acromion process (articulates with the clavicle).
Spine
The flattened lateral portion of the spine of the scapula that forms the apex fo the shoulder and articulates with the clavicle; this is the sole point of attachment fo the scapula and upper limb to the rest of the skeleton
Acromion
Shaped like a bent finger but named for a resemblance to a crow’s beak; it provides attachments for tendons of the biceps brachii.
Coracoid process
