Shoulder girdle Flashcards
1
Q
Primary function of girdle?
A
Provides mobility to enable interaction with the environment.
2
Q
What bones make it up?
A
- Scapula
- Humerus
- Clavicle
3
Q
What joints make it up?
A
- Sternoclavicular
- Acromioclavicular
- Glenohumeral
- Scapulothoracic
4
Q
Details of the scapula?
A
Posterior bone of girdle, lies over the posterio-lateral aspect, flat triangle.
- Lateral aspect is called acromion process, meets with clavicle to form acromioclavicular joint.
- Depression of lateral is glenoid cavity, meets humerus to form glenohumeral joint.
5
Q
Details of clavicle?
A
Curved bone, anterior to shoulders, horizontal from neck to shoulder.
- Medial end is sternal end, meets with sternum to form sternoclavicular joint.
- lateral is acromial end, meets with scapula (acromion) to form the acromioclavicular joint.
6
Q
Details of humerus?
A
- Proximal end; head and neck.
- Shaft
- Distal end (elbow).
- Head sits in the glenoid fossa to form glenohumeral joint.
- Distal end the trochlea articulates with ulna, capitulum with radius to form the ELBOW.
7
Q
Sternoclavicular joint?
A
- Artciulates wirh sternal end of clavicle and notch of sternum.
- 4 ligaments support this joint, sternoclavicular, interclavicular, costoclavicular..
8
Q
Acromioclavicular joint?
A
- Articulates with medial aspect of acromion process and lateral end of clavicle.
- 3 ligaments; acromioclavicular, coracoclavicular, coaracoacormial.
9
Q
Glenohumeral joint?
A
- Articulates with head of humerus and glenoid cavity of scapula.
- Loose to allow movement.
- 4 ligaments for stability; coracohumeral, glenohumeral,
10
Q
What is the glenoid labrum?
A
A fibrocartilaginous rim around the glenoid cavity that effectively deepens the socket and improves stability.
-Prone to tearing.
11
Q
Movements of the GH joint?
A
- Flexion and extension
- Abduction and adduction
- Medial and lateral rotation
- Circumduction
12
Q
Movements of the scapula?
A
Elevation Depression Retraction Protraction Lateral rotation Medial rotation
