The shoulder girdle Flashcards
How many joints does the shoulder girdle consist of?
4
Name the joints which the shoulder girdle consists of
Sternoclavicular
Acromioclavicular
Coracoclavicular
Scapulothoracic
Over which ribs does the scapula overlap?
2-7
Which rib is the spine of the scapula in line with?
3 at medial border
What is the acromion process?
Large bony projection on the superior end of the scapula
Important landmark and a muscle attachment point
Forms the acromioclavicular joint with the clavicle
What is the coracoid process?
Projects upward and forward above the glenoid fossa.
Provides attachment for the coracoclavicular ligament as well as the short head of the biceps
What is the glenoid fossa?
A shallow depression into which the humerus fits to form a joint
Describe the clavicle of shoulder girdle
Slightly S shaped long bone
2 articulating ends
Medial end convex ni anterior direction
Transmits forces from upper limbs to trunk
Describe the sternum of the shoulder girdle
Elongated flat bone composed of manubrium body and xipohi processes
Forms midline of anterior chest wall
Runs from root of neck to abdominal wall
Name the main bones of the shoulder girdle
Clavicle
Sternum
Scapula
Describe the sternoclavicular joint
Only point of bony connection between shoulder girdle, upper limb and trunk Diarthrodial joint (gliding) Surrounded by joint capsule Passive movements as result of active scapula movements in a direction opposite that of the scapula
What is the role of the anterior and posterior sternoclavical ligaments ?
Prevent lateral separation
What is the role of the interclavicular ligament?
Joins medial ends of both clavicles
What is the role of the costoclavicular ligament?
Joints inferior border of clavicle to superior border of the first rib
Name the ligaments of the sternoclavicular joint
Anterior ligament
Posterior ligament
Inerclavicular ligament
Costoclavicular ligament
Describe the acromioclavicular joint
Articulation between lateral end of clavicle and acromion process
Ligaments of the acromioclavicular joint
Superior and inferior acromioclavicular ligaments - provide stability
Coraclavicular ligament from lateral end of clavicle to coracoid process
Coracoacromial ligament
Name the parts of the coraclavicular joint
Syndemosis joint
Coracoid process to clavicle
Coracoclavicular ligament
Describe the scapulothoracic joint
Not a true synovial joint as does not involve articulate between 2 bones
Which skeleton to the muscles and movements of the shoulder girdle originate on?
Axial skeleton
Insert on scapula and or clavicle
Do not attach to humerus
Name the muscles of the shoulder girdle
Trapezius levator scapulae Rhomboids Serratus anterior Pectoralis minor Subclavius
Why are the muscles of the shoulder girdle essential?
Essential for dynamic stability of the scapula, acts as base of support for shoulder joint such as throwing
Name the movements of the shoulder girdle
Elevation Depression Protraction Retraction Upward roation Downward rotation
Name the different parts of the trapezius
Upper fibres
Middle fibres
Lower fibres
Name the 2 rhomboid muscles
Rhomboid minor (above) Rhomboid major (below)
