Shoulder Flashcards
(24 cards)
ligaments of the shoulder region
costoclavicular ligament
anterior sternoclavicular ligament
articular disc (sliding and gliding)
interclavicular ligament
ligaments that hold scapula/clavicle together
coracoclavicular and acromioclavicular ligament
dislocation of shoulder
separation of humeral head and scapula
ligament that protects humeral head
coracoacromial ligament
rotator cuff & attachments
lesser tubercle (anterior): subscapularis greater tubercle (lateral): supraspinatus, infraspinatus, teres minor
action of subscapularis
internal rotation
action of infraspinatus/teres minor
external rotation
action of supraspinatus
abduction
primary action of the rotator cuff
hold head of humerus against glenoid fossa
attachment of long head
supraglenoid rubercle
attachment of short head
coracoid process
how is shoulder abduction accomplished
total = 180 degrees humeral = 120 degrees scapula = 60 degrees
clavicular action during rotation
anterior surface moves up as coracromial ligament tightens
external rotators of shoulder
infraspinous, teres minor (posterior)
internal rotators of shoulder
suprascapularis, pectoralis major (anterior/transverse)
flexors of shoulder
anterior/longitudinal (biceps, coracobrachialis, deltoid, pec major)
extensors of shoulder
teres major, triceps, latissimus dorsi
scapular protraction
serratus anterior ()
scapular retraction
trapezius/rhomboids (–>
superior rotation of scapula
serratus anterior, trapezius
elevation of scapula
trapezius, levator scapulae, rhomboids
depression of scapula
trapezius, pec minor
inferior rotation of scapula
levator scapulae, rhomboids
collateral shoulder circulation
subclavian –> axillary, suprascapular artery and transverse cervical artery
brachial –> circumflex scapular and subscapular artery
These superior and inferior branches anastomose!
