Shoulder Flashcards
What joint is on top of the shoulder?
AC (acromioclavicular) joint
What joint is what we think of as the shoulder?
GH (glenohumeral) joint
What is scapulothoracic?
scapula and ribs
What is sternoclavicular?
clavicle and sternum joint
What are the 4 rotator cuff muscles?
- supraspinatus
- infraspinatus
- teres minor muscle
- subscapularis muscle
What do we look for in shoulder assessment observations?
- forward head
- rounded shoulders
- winging scapula
How does forward head affect the shoulder?
pressure on nerves in neck, will refer to arm
How does rounded shoulders affect the shoulder?
shortened muscles on front, elongated muscles in back, changing how the arm sits
What is winging scapula?
scapula sits out from body, not tight to ribcage
Separations are specific to which joint?
AC joint
Dislocations are specific to which joint?
GH joint
Where does AC joint sprains occur?
at very top of shoulder
What is the MOI of AC joint sprains?
- vulnerable in collision sports
- FOOSH (upwards force on clavicle)
- ex. bike riders hitting ground, hockey players hitting boards
What are the signs and symptoms of a grade 1 AC joint sprain?
- stretch of ligaments, no tearing
- mild symptoms
What are the signs and symptoms of a grade 2 AC joint sprain?
- some stretch, some tearing
- moderate symptoms
- will see laxity with special tests
- will see some deformity
What are the signs and symptoms of a grade 3 AC joint sprain?
- rupture of all of the main ligaments in that joint
- not physically attached
- severe symptoms
- severe deformity
Grades 4-6 of AC joint sprains involve what?
fractures or displacement of the clavicle
What is step deformity?
- as you have less ligaments holding it, the end of the clavicle sneaks up
- tends to be lifelong
How do we manage 1st and 2nd degree AC joint sprains?
- RICE
- Modalities to calm down spasm
- Strengthen joint
- Regain ROM
How do we manage grades 3+ AC joint sprains?
- Need to be seen at the hospital
- Check for fractures
- Check to see if clavicle is still where it should be
- May need surgery (fracture: bar and pin)
- Immobilized in sling for usually 5-6 weeks
- Start doing some rehab at weeks 2-3
What are the special tests for AC joint sprains?
- physically looking for deformity
- cupping and pushing clavicle up and down
What are positive tests for AC joint sprains?
- Pain is 1st degree
- Pain and laxity is 2nd degree
- No pain and laxity is 3rd degree
- Grades 4-6 would not be able to touch it
50% of all dislocations occur where?
at the shoulder
dislocations =
- sprains and strains
In what direction do GH dislocations occur?
- can occur in any direction
- anterior dislocations are most common
- can go straight backward (arm gets hit, humerus goes backwards)
- can go inferior (arm abducted, hit on top)
Dislocations can either…
stay out or move out and come back into place
What is the MOI for GH dislocations?
- abduction with external rotation
- any large trauma to shoulder
What are subluxations?
- partly out of place and coming back in
- usually muscle or ligament stops it from going all the way out
Why do GH dislocations need to be seen by a doctor at a hospital?
- Arteries, veins, nerves, don’t want secondary injury
- X-rays
- Everything is sitting where it should
What is a complication from GH dislocations?
- Labrum is cup that sits inside shoulder blade
- Common to tear and have extra injury
- Makes rehab more complicated
What are the signs and symptoms of GH dislocations?
- sulcus deformity
- Pain and disability
- Can be physically stuck in the position
- Generally aching pain, not sharp pain
- Will have full movement in through elbow and hand
- No ability to move shoulder
- Can fully shoulder shrug (doesn’t involve GH joint)
What is sulcus deformity?
- Deltoid is holding humerus into place (being hung)
- Deltoid muscle will be very flat
- Will look like they have very little shoulder development on one side
What is backwards rehab?
scar the joint down
Doing too much early in rehab of GH dislocations could result in?
can turn into someone who can pop out shoulder all the time
Describe rehab for GH dislocations.
- backwards rehab
- Nothing to hold it back in place (ligaments and muscles are sprained and strained)
- Put in brace (big harness), left for 6 weeks, no ROM at shoulder
- Can start isometrics in that position
- After 6 weeks, if it seems fused in there, then we will start ROM
- All ROM is to be below 90 degrees (horizontal)
- After 3 months post injury, we add ROM above 90 degrees
What are the special tests for GH dislocations?
- sulcus test
- apprehension position
- anterior and posterior drawer
What is the sulcus test?
- Flattened deltoid
- Pull down on arm to create more of an effect
- Will see gap below acromion
What is apprehension position?
- Full external rotation with abduction
- Will not like their position
- Uncomfortable and unstable
- Makes it feel like their shoulder is going to pop out
Describe the anterior drawer and what a positive test looks like.
- physically pulling humerus forward, stressing ligaments on anterior side of joint
- Laxity: more movement forward
- Need to make sure pecs are stronger
Describe the posterior drawer and what a positive test looks like.
- Physically pushing humerus backward, stressing ligaments on posterior side of joint
- Laxity: more movement backward
- Need to make sure rotator cuff muscles and triceps are stronger