Dissection 3: Posterior shoulder and rotator cuff muscles Flashcards
What are the three movements that the deltoid brings about
extension of the shoulder
abduction of the shoulder after 15 degrees
flexion of the shoulder
What do the ascending fibres of the trapezius do
depress the scapula
what do the middle fibres of the trapezius do
retract the scapula
What to the descending fibres of the trapezius do
elevate the scapula
What is the function of the rhomboids major and minor
retraction of the scapula and inferior rotation of the glenoid fossa
What is the function of supraspinatous
first 15 degrees of abduction at the shouldr
What is the function of infraspinatous
lateral rotation of shoulder
What is the function of teres minor
lateral rotation
what is the function of subscapularis
medial rotation
what is the function of teres major
adduction/medial rotation at the shoulder
What nerve supplies the deltoid
axillary
Where do the rotator cuff muscles attach
to the scapula proximally and to the tubercles of the head of the humerous distally
Which rotator cuff muscles attach distally to the greater tubercle of the humerous
supraspinatous, infraspinatous and teres minor
Which rotator cuff muscle inserts on the lesser tubercle of the humrous
subscapularis