Dissection 3: Posterior shoulder and rotator cuff muscles

Question 1

What are the three movements that the deltoid brings about

Answer 1

extension of the shoulder
abduction of the shoulder after 15 degrees
flexion of the shoulder

Question 2

What do the ascending fibres of the trapezius do

Answer 2

depress the scapula

Question 3

what do the middle fibres of the trapezius do

Answer 3

retract the scapula

Question 4

What to the descending fibres of the trapezius do

Answer 4

elevate the scapula

Question 5

What is the function of the rhomboids major and minor

Answer 5

retraction of the scapula and inferior rotation of the glenoid fossa

Question 6

What is the function of supraspinatous

Answer 6

first 15 degrees of abduction at the shouldr

Question 7

What is the function of infraspinatous

Answer 7

lateral rotation of shoulder

Question 8

What is the function of teres minor

Answer 8

lateral rotation

Question 9

what is the function of subscapularis

Answer 9

medial rotation

Question 10

what is the function of teres major

Answer 10

adduction/medial rotation at the shoulder

Question 11

What nerve supplies the deltoid

Answer 11

axillary

Question 12

Where do the rotator cuff muscles attach

Answer 12

to the scapula proximally and to the tubercles of the head of the humerous distally

Question 13

Which rotator cuff muscles attach distally to the greater tubercle of the humerous

Answer 13

supraspinatous, infraspinatous and teres minor

Question 14

Which rotator cuff muscle inserts on the lesser tubercle of the humrous

Answer 14

subscapularis