Pathophysiology - UE Dysfunction Flashcards
test 2
T or F?
The upper extremity consists of the shoulder complex, elbow and forearm complex, and wrist and hand.
True
How many articulations are there in the shoulder complex?
4 - between the humerus, sternum, scapula, and clavicle
What are the three synovial joints of the shoulder?
GH (ball and socket), SC (saddle), and AC (plane/gliding)
Which joint is an articulation between the medial end of the clavicle, clavicular notch of manubrium of sternum, and cartilage of first rib?
sternoclavicular joint
What movements does the SC joint have?
Elevation/depression
Protraction/retraction
Upward/downward rotation
Winging and tipping
What kind of joint is AC joint?
Gliding or plane joint
What serves as the main articulation that suspends the upper extremity from the trunk and is the joint about which the scapula moves?
AC Joint
What are the motions of the AC joint?
Upward/downward rotation
Rotation in horizontal plane
Rotation in sagittal plane
T or F?
GH joint is relatively stable and doesn’t rely on the muscles and structures (ligaments, labrum) around it.
FALSE - GH is unstable and relies on muscles, ligaments, and joint capsule around it
How many bursae of GH joint?
12
What is the scapulohumeral rhythm?
For every 2 degrees of shoulder abduction, scapula must upward rotate 1 degree
What condition is an alteration in the normal position or motion of the scapula during scapulohumeral movements?
Scapular dyskinesis
Scapular dyskinesia should be suspected in patients with what and is classified by what?
Scapular dyskinesis should be suspected in pts with a shoulder injury and can be identified and classified by specific physical exam
What type of scapular dyskinesis is characterized by prominence of the inferior medial scapular border?
Type 1
What type of scapular dyskinesis is characterized by the entire medial border protruding?
Type 2
What type of scapular dyskinesis is characterized by superior translation of the entire scapula and prominence of the superior medial border?
Type 3
What condition refers to pain and weakness most commonly experienced with movements of the shoulder ER and elevation as a consequence of excessive load on rotator cuff tissues and is commonly referred to as “subacromial impingement syndrome”?
Rotator cuff tendinopathy
T or F?
In rotator cuff tendinopathy, acromial irritation may not be the primary cause of symptoms
True
What are the 2 main conditions that can lead to rotator cuff tendinopathy?
Primary: intrinsic degenerative process when the top of the RC is compressed by the surrounding bone and soft tissue b/c decreased subacromial space
Secondary: results from GH instability and/or tensile overload of the RC resulting in poor control of the humeral head during overheard activities (pts here are usually under 35 yo and have traumatic instability, posterior defect of humeral head, and damage to glenoid labrum)
What is the cause of internal glenoid impingement?
Caused by impingement of the posterior edge of the supraspinatus and anterior edge of the infraspinatus against the posterior-superior glenoid and glenoid labrum
What is the mechanism of injury for internal glenoid impingement?
Extension, abduction, and ER
What condition is a common cause of posterior shoulder pain in throwing or overheard athletes and is commonly misdiagnosed as rotator cuff tendinopathy?
Internal glenoid impingement
What is internal glenoid impingement also called?
Posterior-superior glenoid impingement or posterior impingement
What are some factors in rotator cuff tendinopathy?
Position of arm during activities, age capsular tightness, condition of the AC joint, correct function of dynamic stabilizers, amount of vascularization to the cuff, and poor endurance of scapular pivots (sustained or repetitive overhead activities)
What is the primary intervention for rotator cuff tendinopathy?
Active exercise therapy to relieve pain, reduce mm spasm, promote tendon healing, restore normal shoulder movement, and improve function
T or F?
Conservative care is implemented first before surgical options of RC tendinopathy
True
What is occurring in tradition open rotator cuff repair?
Vertical incision over anterior shoulder, deltoid is divided to allow access to RC and subacromial space, and an anterior and inferior acromioplasty is done to reduce acromion
During what surgical option for RC repair is an anterior and posterior acromioplasty performed?
Traditional open RC repair
What is occurring in a mini open surgical repair of RC?
Arthroscopic subacromial decompression with deltoid splitting
What are benefits of doing and arthroscopic procedure for RC repair over surgery?
smaller incision, get to inspect GH joint, can treat intra-articular lesions, you avoid detaching the deltoid, less soft tissue dissection, and less pain
T or F?
Regardless if during an open arthroscopic procedure to fix RC tendinopathy, post surgical rehab is the same because the TENDON TO BONE HEALING stays the same?
True. Speed of progression of healing depends on the status of the deltoid muscle, size of tear, and ability to move shoulder without injuring tissues
For a small tear in the RC, how long do you have to wear a sling?
1-3 weeks
For a medium tear in the RC, how long do you have to wear a sling?
3-6 weeks
For a large/massive tear in the RC, how long do you have to wear a sling?
6-8 weeks
ER beyond neutral is restricted for the first ___ weeks after a fix of a RC tear?
4 weeks
T or F?
Some patients may require an abduction orthosis if the tension through the repair site is minimal or not with the arm in 20-40 degrees of abduction
True
What is the term for abnormal symptomatic motion of the GH joint that affects normal joint kinematics and results in pain, subluxation, or dislocation of the shoulder?
Glenohumeral instability
T or F?
The more unstable the GH joint, the less use, and therefore the more shoulder dysfunction
True
What are some causes of GH joint instability? (3)
- Genetics
- Biochemical (collagen)
- Biomechanical factors
What is the characteristic complaint of glenohumeral instability?
Shoulder slipping or popping out during overheard activities
What is the most common direction of GH instability?
Anterior instability
How does anterior GH instability occur?
When the abducted shoulder is repeatedly place in anterior position of ER and horizontal abduction.
Pts with anterior GH instability may have pain with what movements?
Overhead movements due to inability to control their laxity using their muscles.
What can occur unilaterally from acute traumatic events that cause secondary lesions such as Bankart (avulsion of anteroinferior labrum from glenoid rim and requires surgery) and Hill-Sachs lesions (depression fracture on posterior humeral head at site where humeral head impacted the inferior glenoid rim)?
Anterior GH instability
T or F?
Chronic, recurrent dislocations of the shoulder is not something that can lead to degenerative arthritis
FALSE - chronic, recurrent dislocations of the shoulder can lead to degenerative arthritis
Who is most likely to have a RC tear with a GH dislocation?
An older person
T or F?
Recurrent subluxations can cause dysfunction and GH instability
True
What is the typical method of injury resulting in GH instability?
FOOSH (fall on outstretched hand) this forces into abduction, extension, and ER
What type of GH instability is rare?
Posterior instability
What type of GH instability is often associated with a seizure, electric shock, MVA, or diving into a shallow pool?
Posterior GH instability
Pts with posterior GH instability have sx’s with the arm in what position?
Forward flexed and adducted
What are the three classifications of posterior GH instability?
Subacromial, subglenoid, and subspinouse (most common)
What is the classic sign of posterior GH instability?
A loud clunk as shoulder is moved from flexion to abduction and ER
What type of GH instability is uncommon?
Inferior GH Instability
How can inferior GH instability occur?
From carrying heavy objects at your side or hyperABDuction forces that cause levering of the humeral neck against the acromion
T or F?
Inferior sublux is common in pts with inferior GH instability after CNS injury secondary to weakness of shoulder girdle and scapular stabilizers
True - RC mms do not have strength to hold humeral head in labrum, so inferior sublux occurrs
What is the term for symptomatic GH instability in more than one direction where rehab is the primary intervention to restore GH stability?
Multidirectional GH instability
What does SLAP lesion mean?
Superior Labral lesions that are both Anterior and Posterior
What condition is occurring when people performing overhead movement may develop a “dead arm” with a painful shoulder?
SLAP lesions
What is the MOI of a SLAP lesion?
FOOSH, sudden deceleration or traction forces (catching a heavy falling obj), MVA, chronic anterior and posterior instability
SLAP lesions - which is fraying and degeneration of edge of superior labrum and the pt loses ability to horizontally abduct and ER with forearm pronated w/o pain?
Type 1
SLAP lesions - which is a vertical tear of the labrum similar to a bucket handle tear of meniscus?
Type 3