Lecture 5: Bones And Joints Of The Shoulder Girdle MS100 Flashcards
Joints of the shoulder girdle
- GH joint
- AC joint
- SC joint
- Scapulothoracic joint
Ligaments of the GH joint and what they limit
- GH ligaments - limits horizontal abduction and lateral rotation
- Coracohumeral ligament - limits lateral rotation and support arm against gravity
- Coracoacromial ligament - limits superior displacement of the humerus
- Transverse humeral ligament - limits lateral displacement of the tendon of the long head of the biceps
- Capsule
Ligaments of the AC joints and what they limit
- Capsule
- AC ligament
Limits overriding of the bones - Coracoclavicular ligaments
Limits post and sup clavicular displacement, controls scapular rotation - Superior transverse scapular ligament
Ligaments of the SC joint and what they limit?
- Capsule
- SC ligaments
Limits anterior and posterior displacement of the clavicle - Costoclavicular ligament
Limits elevation, protraction and retraction of the clavicle; limits shoulder girdle motion - Interclavicular ligament
Limits sup-inf clavicular displacement
Bony landmarks of the clavicle
Impression for the costoclavicular ligament
Groove for subclavius muscle
Tubercle for conoid ligament
Line for Trapzoid ligament
Scapula tubercles and their attachments
Supraglenoid tubercle - long head of biceps brachii
Infraglenoid tubercle - long head of tricep
Borders of the scapula and the attachments
Medial border - distal attachment of rhomboids
Lateral border - proximal attachment of the teres minor
What implants on tubercles of humerus
Greater - insertion of supra- and infraspinous muscle and teres minor
Lesser - insertion of subscapularis
Condyles of the humerus
Trochlea - proximal ulna
Capitulum - proximal radius
Fossae of humerus
Anterior:
Radial - for radius
Coronoid - for ulna
Posterior:
Olecranon - ulna olecranon
Which tendons blends with GH capsule?
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
How many bands does GH ligament have
3 - sup, med, inf
How many bands does Coracohumeral joint have?
2 - sup, inferior
Name bursae of GH joint
Subdeltoid
Subacromial
Subscapular
Location of subdeltoid bursae
Between deltoid and acromion - and proximal humerus.
Location of the subacromial bursae
Coracoacromial ligament and acromion - and supraspinatus tendon
Location of subscapular bursae
Anterior and deep to subscapularis tendon
Movement of the AC joint
Sup/inf rotation of scapula
Protraction / retraction of scapula
Upward tilt of the scapula
FOOSH
How does Coracoclavicular ligament help
Fall on outstretched hand
Force to GH joint - scapula - SC
Movements of SC joint
Clavicular elevation-depression
Clavicular protraction - retraction
Clavicular rotation
What are the functions of the disc of the SC joint?
Some motion of the sc joint and shock absorption
Classification of the SC joint
Biaxial, saddle, synovial
AC joint classification
Non axial, plane, synovial
What joints has a vestigial remnant?
AC joint - Fibricartilagenous disc
