shoulder joint Flashcards
define the joint capsule
Thin-walled, spacious container
Attaches around rim of glenoid fossa of the scapula and anatomical neck of the humerus
what are the membranes of the joint capsule and taut/slack
Outer fibrous membrane
Inner synovial membrane
Taut/Slack
Arm hanging at side, superior portion taut
Shoulder abducted, inferior taut, superior slack
define the coracohumeral
Lateral side of coracoid process
Medial side of greater tubercle
Strengthens the upper part of the joint capsule
the function of glenohumeral ligament
Reinforces anterior portion of the capsule
Not well-defined
Superior glenohumeral ligament
Middle glenohumeral ligament
Inferior glenohumeral ligament
Actually pleated folds of the capsule
define the sub deltoid bursae
Large
Located between the deltoid muscle and joint capsule
define the subacromial bursae
Lies below the acromion and coracoacromial ligament, between them and the joint capsule
Frequently continuous with the subdeltoid bursa
what do the SITS muscles do
Help keep the head of the humerus rotating against the glenoid fossa
what keeps the shoulder stability
Glenoid labrum
Glenoid fossa anterior, lateral and upward direction
Upward direction provides some stability
Joint capsule reinforced by the coracohumeral and glenohumeral ligaments
Capsule completely surrounds fossa, partial vacuum
Rotator cuff muscles
Shoulder muscles
the function of thoracolumbar fascia
Covering the sacrospinalis muscle
Provides a broad attachment for the latissimus dorsi
thoracolumbar Superficial fibrous sheet attaching to:
Spinous processes of the lower thoracic and lumbar vertebra
Supraspinal ligament
Posterior part of the iliac crest
Teres Major and minor attachment
axillary border
labrum
Fibrocartilaginous Ring
Attachment (medial) of the bicipital groove
latissimus dorsi and teres major, supraspinatus
Attachment (lateral) of bicipital groove
pectoralis major
define the glenoid labrum
Fibrous tissue surrounding glenoid fossa
Deepens the articular cavity
