articulations and ligaments Flashcards
What are articulations of the pectoral girdle?
Sternoclavicular joint
Acromioclavicular joint
Glenohumeral joint
What are the bones of the pectoral girdle?
Clavicle
scapula
humerus
What is the sternoclavicular joint?
proximal attachment Where the clavicle is connected to to the manubrium
How are the sternum and clavicle connected?
ligaments anteriomedially and posterior medially
with and articular disk in between
What are the ligaments of the sterniclavicular joint?
anterior and posterior sternoclavicular ligaments
interclavicular ligament
costoclavicullar ligament
What aid the acromioclavicular joint?
joint that is connecting the clavicle to the acromion process of the scapula
What are the ligaments that hold the acromioclavicular joint together?
Acromioclavicular ligament
coracoacromial ligament
coracoclavicular ligament (trapezoid and conoid parts)
these are most common in shoulder separations in sports injuries
What is the glenohumeral joint?
the round humerus fitting into a flattened glenoid fossa
What enlarges the surface area of the glenohumeral joint?
glenoid labrum - fibrocartaligenous that extends around the entire joint and reinforced anteriorly by glenohumeral ligaments
How are the glenohumeral joints named?
from superior to inferior
What enhances the stability of the glenohumeral joint?
tendon of long head o biceps - superior
muscels and tendons of the rotator cuff - anterior, posterior and superior
acromion - superior
Where does most of the dislocations in the shoulder occur?
anteriorly
inferiorly
this has little protection
What arteries and nerve can be injured in shoulder dislocations?
Axillary artery and nerve
the glenohumeral joint cant dislocate inferiorly because it weak in that area. once it breaks i is pull inferior to subscapularis
Where does breaks most commonly occur at the clavicle?
breaks occur at the lateral end before dislocations happen because the proximal and distal ends are firmly secured
