shoulder Flashcards
what does the GH joint count on for its stability, support, and integrity?
muscles and ligaments
what kind of joint is the glenohumeral joint?
multiaxial, ball in socket, synovial joint
the labrum deepens the glenoid cavity of the scapula by what percent?
50%
what is the closed position of the GH Jt?
full abduction and external rotation
what are the primary ligaments of the GH joint?
superior, middle, and inferior glenohumeral ligament
which primary ligament of the GH joint is the most important of the three?
inferior glenohumeral ligament
what is the capsule pattern of the GH joint?
lateral rotation>abduction>medial rotation
what bones make up the acromioclavicuar joint?
acromion process of the scapula and the lateral end of the clavicle
how many degrees of freedom does the AC joint have?
three degrees
what ligament provides the primary support to the AC joint?
coracoclavicular ligament
what two ligaments make up the coraclavicular ligament?
conoid and the trapezoid
what ligament has to be torn for there to be a step deformity?
coracoclavicular ligament
what ligaments are a part of the AC joint?
the acromionclavicular and the coracoclavicular ligament
what are the ligaments of the sternoclavicular joint?
anterior and posterior sternoclavicular ligament
interclavicular ligament
costoclavicular ligament
what is the main ligament maintaining the integrity of the sternoclavicular joint?
costoclavicular ligament
true or false: the scapulothoracic joint is not a true joint?
true
what level of the spine does the inferior angle of the scapula hit?
spinous process of T7-T9
what is tendinosis?
degeneration of the tendon
what muscles will be weak with an injury to the radial nerve?
triceps, wrist extensors, finger extensors
what is a another name for a subcoracoid dislocation?
an anterior dislocation
what are the two common causes of scapular winging?
long thoracic nerve palsy, and spinal accessory nerve
what is sprengel’s deformity?
a developmental condition leading to a high or undescended scapula
what is the m/c congenital deformity of the shoulder complex?
sprengel’s deformity
what two muscles are involved in the force couple to stabilize lateral rotation of the scapula?
trapezius and serratus anterior
during what degrees of the painful arc test does the patient experience pain?
60-120 degrees-glenohumeral painful arc
170-180 degrees- acromionclavicular painful arc
is there a 2:1 ratio for the scapulohumerl rhythm during the first phase?
no
what is reverse scapulohumerl rhythm?
when the scapula moves more than the humerus
how much lateral rotation happens at the GH joint?
80-90 degrees
how many degrees of medial rotation is there in the GH joint?
60-100 degrees
how much extension is there in the GH joint?
50-60 degrees
how much adduction is there at the GH joint
50-75 degrees
what test is the right arm in lateral rotation, flexion, and abduction and the left arm is in medial rotation, extension, and adduction?
apley’s scratch test
what bursitis may limit lateral rotation?
subcoracoid bursitis
what bursitis limits full abduction?
subacromial bursitis
what is a popeye sign?
rupture of the long head of the biceps brachii
where can pain refer from to your shoulder?
cervical spine, elbow, lungs, heart, diaphragm, gallbladder, and spleen
what is the most commonly injured nerve in the shoulder?
axillary
where is the suprascapular nerve most commonly injured?
where it passes through suprascapular notch or as it winds around the spine of the scapula under the spinoglenoid ligament
which shoulder does the lungs, and gallbladder refer to?
the right shoulder
which shoulder does the diaphragm, spleen, and heart refer to?
the left shoulder and the heart does left shoulder and elbow
what is the most common injury for a dislocation at the GH joint?
anterior dislocation
