Shoulder Flashcards
What does the conoid ligament prevent?
conoid resists elevation and protraction
What does the trapezoid ligament do?
provides AC joint compression
What does the acromioclavicular ligament do?
covers joint capsule and reinforces superior aspect
What do the costoclavicular ligaments do at the clavicle during clavicular elevation
tension from these ligaments results in posterior rotation of the clavicle along its axis and resist upwards rotated forces from scapula
What ligament attaches the first rib to the clavicle and creates a lever to allow the lateral end of the clavicle to elevate
costoclavicular ligaments
this is why treating first rib mobility can impact elevation of the shoulder
where does the scapula normally rest on your ribs
Between T2 and T7, with the spine at T3
What plane of motion does the arm need to move through to work the scapulothoracic joint effectively
“scaption”, out at 45 degrees of horizontal adduction
What do we see here R and L?
Scoliosis
R side is protracted and upwardly rotated
L side is downwardly rotated
What kind of glide do we use for improving flexion and internal rotation of the shldr
posterior glide
what kind of glide do we use to improve abduction
Inferior glide
What is the close packed position of the GH joint
90 abd, full ER
AND
full ABD and full ER
What might we see in the shoulder of a thrower
more ER and less IR
we do not want to stretch IR too much because the overall motion should be 180 degrees, if we give them more than that then they will have instability
What is the overall motion of scapulo thoracic rhythm
2 degrees of humeral motion for every 1 degree of scapular motion
What muscle can limit the first rib and therefore lock the shoulder down
subclavius
The humerus needs to be ____________ to clear the greater tuberosity of the acromion
in 35-45 ER
During the initial 20-30 degrees of humeral elevation, _____________ occurs
no scapular motion
60 degrees of scapulothoracic motion also includes ________ of SC elevation and __________ of AC posterior/upward rotation
25 degrees of SC elevation
35 degrees of AC posterior rotation
What do the infraspinatus, teres minor, and subscapularis do in the Deltoid-rotator cuff force couple?
provide a inferior/medial force that counteracts the superior force of the deltoid
We need to train the rotator cuff muscles to do what they’re actually meant to do with arm motion, which is…
center the GH joint
What does the supraspinatus do in the deltoid-rotator cuff force couple
direct compression force to approximate the humerus
which direction does the deltoid pull on the GH joint
pulls upward and outward
Which rotator cuff muscles are most essential to counteract the deltoid force and stabilize the shoulder
Infraspinatus, teres minor, subscapularis
What 3 muscles rotate the scapula upward
Serratus anterior
upper and lower trap
FOCUS ON WORKING THESE MUSCLES TOGETHER
what is the MAIN function of the upper trap, and the movement we want to work when focusing on it
upwards rotation of scapula with arm overhead
What muscle group pair works as a suspension bridge to provide a stable fulcrum to allow for rotation of humeral head on glenoid
Anterior/posterior rotator cuff force couple
Subscap in the front
Infraspinatus and teres minor in the back
they depress the humeral head and compress head into the glenoid
Which part of the serratus anterior is more active with upwards rotation,
which is more active with protraction
Lower fibers
upper fibers
T or F: Dr. P thinks that banded internal rotation at your side is a good way to hit the subscapularis
F, the larger internal rotators like the pecs and lats will take over
how should we work the upper trap in the clinic
work on upper trap in overhead position to work on what it is actually suppose to do
What muscles are we targeting with no-monies, what muscle do we not want to turn on for compensation
Posterior cuff
Rhomboids
Should not see retraction!
What muscle (when tight) can prevent posterior tipping of the scapula during shoulder elevation
Pec minor
What 3 motions happen at the scapula w/ overhead motion
Protraction
Upward rotation
Posterior tilt
What muscle stabilizes the anterior shoulder
Subscapularis
When does winging of the scapula occur?
Only when moving overhead, there is no scapular winging at rest
