Ligaments of the shoulder girdle Flashcards
Movements of the SC joint
- rotation
- elevation
- depression
- minor anterior posterior glide
AC joint movements
- minor rotation
- minor sup/inf glide
Shapes of AC facets
- clavicle: oval inferior aspect
- acromion: oval superior aspect
- meet at 45 degree angle
Superior AC ligament attachments
Superior lateral aspect of clavicle to sup medial aspect of acromion
Inferior AC ligament attachments
Inferior lateral aspect of clavicle to inferior medial aspect of acromion
Coracoclavicular ligaments attachments
Conoid ligament: root of coracoid process to conoid tubercle
Trapezoid ligament: Superior aspect of coracoid process to trapezoid line
Coracoacromial ligament attachments
Lateral coracoid process to summit of acromion
Protects anterior GH and pec minor passes through
Suprascapular ligament
Spans suprascapular notch
2 Apertures of GH capsule
- long head biceps at bicipital groove
- inferior to coracoid process for subscapular bursa
Three ligaments of the GH
Glenohumeral
Coracohumeral
Transverse humeral
Attachments of superior GH ligament
Superior aspect of lesser tubercle to superior anterior aspect of margin of glenoid cavity
Attachments of middle GH ligament
Inferior aspect of lesser tubercle of humerus to mid anterior glenoid cavity
Attachments of inferior GH ligament
Inferior aspect of the anatomical neck to the anterior inferior margin of the glenoid cavity
Attachments of transverse humeral ligament + fx
Posterior aspect of lesser tubercle to anterior aspect of greater tubercle
Converts intertubercular groove into canal for long head of biceps and synovial sheath
Coracohumeral ligament attachments and fx
Root of coracoid process to superior aspect of greater tubercle (blends with attachment of supraspinatus)
Functions to strengthen superior joint capsule
Bursae of the GH
Subdeltoid/subacromial
Subcoracoid
Subscapular
Function of subacromial bursa
Prevents friction between supraspinatus, delts, and joint capsule
Function of subscapular bursa
Prevents friction between subscapularis and lat border of scap
Function of subcoracoid bursa
Extension of subscapular bursa
Prevents friction between biceps short head and subscap
Structures in subacromial arch
Joint capsule
Supraspinatus
Long head biceps
subacromial bursa
Impingement zone
Supports of anterior GH
Pec major Anterior GH ligaments Subscapularis Joint capsule Labrum Coracohumeral lig
Posterior GH supported by:
Infraspinatus
Teres minor
Labrum
