Muscles of the Shoulder Joint

Question 1

Function of Subscapularis?

Answer 1

An anterior rotator cuff muscle

Stabilises the glenohumeral joint)
Medially rotates and adducts the humerus

Question 2

Origin of Subscapularis?

Answer 2

Subscapular Fossa (Medial 2/3)

Question 3

Insertion of Subscapularis?

Answer 3

Lesser Tubercle of Humerus

Question 4

Innervation of Subscapularis?

Answer 4

Upper and Lower Subscapular Nerves

Question 5

Subscapularis test?

Answer 5

Lift Off Test (lift hand with dorsal side on back posteriorly)

Question 6

Supraspinatus Function?

Answer 6

A posterior rotator cuff muscle

Abducts the arm through first 15 degrees (only muscle capable of doing this)

Question 7

Origin of Supraspinatus

Answer 7

SUPRASPINOUS FOSSA of Scapula (Medial 2/3)

Question 8

Insertion of Supraspinatus

Answer 8

Superior Facet of Greater Tubercle of Humerus (Sits)

Question 9

Innervation of Supraspinatus?

Answer 9

Suprascapular Nerve

Question 10

Supraspinatus test?

Answer 10

Abduct the arm against resistance from 0 degrees

Question 11

Infraspinatus function?

Answer 11

A posterior rotator cuff muscle

Laterally rotates the arm at the glenohumeral joint

Question 12

Origin of Infraspinatus

Answer 12

INFRASPINATOUS FOSSA of Scapula (Medial 2/3)

Question 13

Insertion of Infraspinatus

Answer 13

Middle Facet of Greater Tubercle of the Humerus (sIts)

Question 14

Innervation of Infraspinatus

Answer 14

Suprascapular Nerve

Question 15

Infraspinatus test?

Answer 15

Laterally rotate against resistance

Elbow flexed and arm abducted

Question 16

Function of Teres Minor

Answer 16

A posterior muscle of the rotator cuff

Medial rotation and extension of the arm at the glenohumeral joint

Question 17

Origin of Teres Minor

Answer 17

Lateral Border of Scapula (Middle part)

Question 18

Insertion of Teres Minor

Answer 18

Inferior Facet of Greater Tubercle of Humerus (siTs)

Question 19

Innervation of Teres Minor

Answer 19

Axillary Nerve

Question 20

Test for Teres Minor

Answer 20

Same as Infraspinatus muscle

Question 21

Function of Teres Major

Answer 21

A short scapula muscle but DOES NOT contribute to the rotator cuff.

Medially rotation, abduction and extension of the humerus.

Question 22

Origin of Teres Major

Answer 22

Inferior Angle of Scapula

Question 23

Insertion of Teres Major

Answer 23

Intertubercular Sulcus (anterior humerus)

Question 24

Innervation of Teres Major

Answer 24

Lower Subscapular Nerve