Upper Extremity Joints Flashcards Preview

Musculoskeletal Section > Upper Extremity Joints > Flashcards

Flashcards in Upper Extremity Joints Deck (38)
Loading flashcards...
1
Q

Osteokinematic Motions of the Glenohumeral Joint?

A

Flexion/extension

Ab/adduction

ER/IR

2
Q

Loose Pack Position of the Glenohumeral Joint?

A

55 degrees abduction, 30 degrees horizontal adduction

3
Q

Closed Pack Position of the Glenohumeral joint?

A

Abduction + ER

4
Q

Capsular pattern of the Glenohumeral Joint?

A

ER >Abduction > IR

5
Q

What type of joint is the glenohumeral joint?

A

Synovial —ball and socket

6
Q

Osteokinematic Motions of the sternoclavicular joint

A

Elevation/depression

Protraction/Retraction

ER/IR

7
Q

Loose pack position of the sternoclavicular joint?

A

Arm resting by the side

8
Q

Closed back position of the arm?

A

Maximum shoulder elevation

9
Q

Capsular pattern of sternoclavicular joint?

A

Pain at extremes of ROM

10
Q

Osteokinematic motion of the acromioclavicular joint?

A

Anterior/Posterior Tilting

Upward/downward rotation

Protraction/Retraction

11
Q

Loose pack position of the acromioclavicular joint?

A

Arm resting by the side

12
Q

Closed pack position of the acromioclavicular joint?

A

Arm abducted to 90 degrees

13
Q

Capsular pattern of the acromioclavicular joint?

A

Pain at the extremes of ROM

14
Q

Purpose of Acromioclavicular ligaments

A

Control horizontal movements of the clavicle

15
Q

Where does the coracoacromial Ligament attach?

A

Attaches b/t the coracoid process + acromion

Forms a “roof” over the humeral head

16
Q

What is the purpose of the coracoacromial ligament?

A

Limits superior translation of the humeral head + prevents separation of the AC joint

17
Q

Where does the Coracoclavicular ligament attach?

A

Attaches b/t the coracoid process and the clavicle + consists of two different ligaments: Conoid + Trapezoid

18
Q

What is the purpose of the coracoclavicular ligament?

A

Acts as the primary support of the AC jt + limits translation of the humeral head

19
Q

Coracohumeral ligament attaches where?

A

Attaches proximally to the coracoid process and splits distally to attach to the greater and lesser tuberosities

20
Q

What is the purpose of the Coracohumeral ligament?

A

The ligament is found b/t and helps to unite the supraspinatus and subscapularis tendons.

Limits inferior translation of the humeral head

21
Q

Costoclavicular ligament attaches where?

A

Between the medial portion of the clavicle and the 1st rib

22
Q

What is the purpose of the Costoclavicular ligament?

A

Primary supporting ligament for the SC joint

23
Q

Name the Glenohumeral ligaments.

A
  1. Superior
  2. Middle
  3. Inferior
24
Q

What does the superior Glenohumeral Ligament limit?

A

Limits adduction of the shoulder + Er with the shoulder in 0-45 degrees of abduction.

25
Q

What does the middle Glenohumeral Ligament limit?

A

limits ER with the shoulder in 45-90 degrees of abduction

26
Q

What does the inferior glenohumeral ligament limit?

A

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

27
Q

What is the purpose of the Glenoid Labrum?

A

Fibrocartilaginous stricter that deepens the glenoid fossa + increases the size of the articular surface

  • Often damaged with recurrent shoulder instability
28
Q

What is a the joint capsule of the GH joint?

A

Arises from the glenoid fossa and the glenoid labrum to blend w/ the muscles of the rotator cuff

29
Q

What much bigger is the GH joint capsule than the humeral head?

A

2x the size of the humeral head

30
Q

What reinforces the GH joint capsule?

A

The GH ligaments and the coracohumeral ligament

31
Q

What is the Rotator interval?

A

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

32
Q

Where is the subacromial bursa located?

A

Extends over the supraspinatus tendon and distal muscle belly, beneath the acromion and deltoid muscle

33
Q

What is the purpose of the subacromial bursa?

A

Facilities movement of the Deltoid muscle over the fibrous capsule of the shoulder joint and supraspinatus tendon

34
Q

What is the subacromial bursa typically involved in?

A

Impingement beneath the acromial arch

35
Q

Where is the subscapular bursa located?

A

Overlies the anterior jt capsule + lies beneath the subscapularis muscle

36
Q

Anterior Shoulder fullness may indicate articular effusion secondary to distinction of the ___________.

A

Subscapular bursa

37
Q

Transverse humeral ligament attaches to?

A

Attaches b/t the greater + lesser tubercles of the humerus, spanning over the bicipital groove

38
Q

What is the purpose of the transverse humeral ligament?

A

Maintains the tendon of the long head of the biceps writhing the bicipital groove