Upper Extremity Joints Flashcards
Osteokinematic Motions of the Glenohumeral Joint?
Flexion/extension
Ab/adduction
ER/IR
Loose Pack Position of the Glenohumeral Joint?
55 degrees abduction, 30 degrees horizontal adduction
Closed Pack Position of the Glenohumeral joint?
Abduction + ER
Capsular pattern of the Glenohumeral Joint?
ER >Abduction > IR
What type of joint is the glenohumeral joint?
Synovial —ball and socket
Osteokinematic Motions of the sternoclavicular joint
Elevation/depression
Protraction/Retraction
ER/IR
Loose pack position of the sternoclavicular joint?
Arm resting by the side
Closed back position of the arm?
Maximum shoulder elevation
Capsular pattern of sternoclavicular joint?
Pain at extremes of ROM
Osteokinematic motion of the acromioclavicular joint?
Anterior/Posterior Tilting
Upward/downward rotation
Protraction/Retraction
Loose pack position of the acromioclavicular joint?
Arm resting by the side
Closed pack position of the acromioclavicular joint?
Arm abducted to 90 degrees
Capsular pattern of the acromioclavicular joint?
Pain at the extremes of ROM
Purpose of Acromioclavicular ligaments
Control horizontal movements of the clavicle
Where does the coracoacromial Ligament attach?
Attaches b/t the coracoid process + acromion
Forms a “roof” over the humeral head
What is the purpose of the coracoacromial ligament?
Limits superior translation of the humeral head + prevents separation of the AC joint
Where does the Coracoclavicular ligament attach?
Attaches b/t the coracoid process and the clavicle + consists of two different ligaments: Conoid + Trapezoid
What is the purpose of the coracoclavicular ligament?
Acts as the primary support of the AC jt + limits translation of the humeral head
Coracohumeral ligament attaches where?
Attaches proximally to the coracoid process and splits distally to attach to the greater and lesser tuberosities
What is the purpose of the Coracohumeral ligament?
The ligament is found b/t and helps to unite the supraspinatus and subscapularis tendons.
Limits inferior translation of the humeral head
Costoclavicular ligament attaches where?
Between the medial portion of the clavicle and the 1st rib
What is the purpose of the Costoclavicular ligament?
Primary supporting ligament for the SC joint
Name the Glenohumeral ligaments.
- Superior
- Middle
- Inferior
What does the superior Glenohumeral Ligament limit?
Limits adduction of the shoulder + Er with the shoulder in 0-45 degrees of abduction.
What does the middle Glenohumeral Ligament limit?
limits ER with the shoulder in 45-90 degrees of abduction
What does the inferior glenohumeral ligament limit?
Inferior GH ligament has an anterior and posterior band that limits ER + IR above 90 degrees of abduction
B/t the two bands is an axillary pouch that limits inferior translation when the shoulder is above 90 degrees
What is the purpose of the Glenoid Labrum?
Fibrocartilaginous stricter that deepens the glenoid fossa + increases the size of the articular surface
- Often damaged with recurrent shoulder instability
What is a the joint capsule of the GH joint?
Arises from the glenoid fossa and the glenoid labrum to blend w/ the muscles of the rotator cuff
What much bigger is the GH joint capsule than the humeral head?
2x the size of the humeral head
What reinforces the GH joint capsule?
The GH ligaments and the coracohumeral ligament
What is the Rotator interval?
A space in the anterosuperior shoulder that consists of and is bordered by the coracohumeral ligament, the superior GH ligament, joint capsule, and supraspinatus + subscapularis tendons
Where is the subacromial bursa located?
Extends over the supraspinatus tendon and distal muscle belly, beneath the acromion and deltoid muscle
What is the purpose of the subacromial bursa?
Facilities movement of the Deltoid muscle over the fibrous capsule of the shoulder joint and supraspinatus tendon
What is the subacromial bursa typically involved in?
Impingement beneath the acromial arch
Where is the subscapular bursa located?
Overlies the anterior jt capsule + lies beneath the subscapularis muscle
Anterior Shoulder fullness may indicate articular effusion secondary to distinction of the ___________.
Subscapular bursa
Transverse humeral ligament attaches to?
Attaches b/t the greater + lesser tubercles of the humerus, spanning over the bicipital groove
What is the purpose of the transverse humeral ligament?
Maintains the tendon of the long head of the biceps writhing the bicipital groove
