Term
| Shoulder joint complex includes what joints? |
|
Definition
Glenohumeral joint
Sternoclavicular joint
Acromioclavicular joint
Scapulothoracic articulation |
|
|
Term
| Characteristics of the glenohumeral joint |
|
Definition
-Ball and socket joint with capsule, ligaments and bursae
-sacrificed congruency to serve mobility needs of the hand
-susceptible to degeneration, derangement, and dislocation
-stability is gained from surrounding ligaments and muscles (esp rotator cuff) |
|
|
Term
| Characteristics of the joint capsule |
|
Definition
-thin
-large
-lax
-suction effect |
|
|
Term
| The joint capsule is reinforced by what ligaments? |
|
Definition
| glenohumeral ligaments and the coracohumeral ligament |
|
|
Term
| The joint capsule is ____ the size of the humeral head, allowing for what? |
|
Definition
| 2x's, 1-2 cm of distraction and joint excursion away from the glenoid fossa |
|
|
Term
| The joint capsule is loose _____ and _____ allowing for greater mobility. |
|
Definition
| anteriorly and inferiorly |
|
|
Term
| The joint capsule forms a _____ providing ______ between articulating surfaces |
|
Definition
| vacuum, negative pressure |
|
|
Term
| In the subacromial space, what allows for frictionless movement? |
|
Definition
|
|
Term
| In the subacromial space, the ______ creates a "secondary joint" for passage of the ________ and ________ |
|
Definition
| corocoacromial ligament, supraspinatus, and infraspinatus tendons |
|
|
Term
| Subacromial space distance |
|
Definition
| 9-10 mm (leading to potential impingement) |
|
|
Term
| Two prolongations of joint capsule occur where? |
|
Definition
| the subscapular bursa and the synovial sheath of the biceps tendon |
|
|
Term
| Subacromial bursa includes _____ as these two usually communicate |
|
Definition
|
|
Term
Re: subacromial bursa
Wearing away of the _____ and ______ may open up a communication into the joint space. |
|
Definition
| supraspinatus tendon, capsule |
|
|
Term
| Muscular and ligamentous reinforcement of the GH joint is weakest ______ near the ________ and the _______. |
|
Definition
| inferioly, posterior humeral circumflex artery, axillary nerve |
|
|
Term
| _______ ligaments reinforce the capsule anteriorly. |
|
Definition
|
|
Term
| The weakest and most vulnerable region of the glenohumeral ligament is ________. This location is a common site of _______? |
|
Definition
| between the middle and inferior bands, humeral head extrusion/dislocation |
|
|
Term
| What motions do the glenohumeral ligaments restrict? |
|
Definition
Middle and inferior GH ligaments limit abduction, all three limit external rotation
(taut in abduction and external rotation) |
|
|
Term
| coracohumeral ligament attachments |
|
Definition
| from the coracoid process of the scapula to the two tuberosities of the humerus |
|
|
Term
| What ligament is taut in extension? |
|
Definition
| anterior band of the coracohumeral ligament |
|
|
Term
| what ligament is taut in flexion? |
|
Definition
| posterior band of the coracohumeral ligament |
|
|
Term
| The coracohumeral ligaments are taut in what positions? |
|
Definition
|
|
Term
| Coracohumeral ligaments attachments |
|
Definition
| from the coracoid process of the scapula to the two tuberosities of the humerus |
|
|
Term
| Coracohumeral ligaments are taut in what motions? |
|
Definition
in extension- anterior band tightens
in flexion- posterior band tightens |
|
|
Term
| Resting position of the humeral head |
|
Definition
| rests only on a small inferior portion of the fossa |
|
|
Term
| Passive tension in _______, ________, and _______ hold the joint in the resting position |
|
Definition
| capsule, coracohumeral ligament, supraspinatus tendon |
|
|
Term
| Lack of passive tension of the ______ causes joint creep and eventual dislocation |
|
Definition
|
|
Term
| The coracoacromial ligament forms an arch between ______ and ______ |
|
Definition
| the coracoid process, the acromion |
|
|
Term
| The coracohumeral ligament prevents _______ |
|
Definition
| superior traumatic dislocation of the humeral head |
|
|
Term
| The coracohumeral ligament protects _______ |
|
Definition
| the structures beneath it from direct trauma from above |
|
|
Term
|
Definition
|
|
Term
| The coracoacromial arch forms an _______ space containing the _______, ________, and ________ |
|
Definition
| osteoligamentous, supraspinatus tendon, the subacromial bursa, a portion of the tendon of the long head of the biceps |
|
|
Term
| The coracoacromial arch space is normally ______ (length) |
|
Definition
|
|
Term
| Characteristics of the acromioclavicular joint |
|
Definition
| highly variable synovial joint with 3 degrees of freedom, an articular disc (highly variable) |
|
|
Term
| Primary function of the acromioclavicular joint |
|
Definition
| to maintain the relationship between the clavicle and the scapula |
|
|
Term
| Acromioclavicular joint capsule is strengthened horizontally by the _______ and superiorly by _______ |
|
Definition
| AC ligaments (superior and inferior), the aponeurotic expansions of the deltoid and trapezius muscles |
|
|
Term
| Coracoclavicular ligaments prevent _______ and _______ |
|
Definition
| upward rotation of the scapula at the AC joint, superior dislocation of the clavicle increasing AC joint stability |
|
|
Term
| Sternoclavicular joint description |
|
Definition
| A modified synovial sellar joint |
|
|
Term
| At the sternoclavicular joint, the _______ enhances stability and absorbs compressive forces |
|
Definition
|
|
Term
| Sternoclavicular joint motion around a vertical axis of rotation |
|
Definition
|
|
Term
| Range of sternoclavicular protraction and retraction |
|
Definition
protraction: 30 degrees anteriorly
retraction: 25 degrees posteriorly |
|
|
Term
| Clavicle motion in anterior and posterior directions are checked by the _______ and either the ______ or ______ |
|
Definition
| costoclavicular ligament, anterior, posterior joint capsule |
|
|
Term
| Sternoclavicular joint motion around the AP axis of rotation |
|
Definition
|
|
Term
| Inferior motion of the medial clavicle (elevation) is limited by ______ and ______ |
|
Definition
| costoclavicular ligament, subclavius muscle tone |
|
|
Term
| Superior motion of the medial clavicle (depression) is limited by the ______ and _______ |
|
Definition
| superior capsule, contact of the first rib |
|
|
Term
| With elevation the proximal clavicle glides ______ and ______ |
|
Definition
|
|
Term
| Range of sternoclavicular elevation and depression |
|
Definition
elevation: 40 degrees
depression: 10 degrees |
|
|
