Scapulohumeral (Intrinsic Shoulder) Muscles

Question 0

Origin of Deltoid

Answer 0

Lateral third of Clavicle
Acromion
Spine of Scapula

Question 1

Rotator Cuff Muscles

Answer 1

SITS
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

Question 2

Insertion of Deltoid

Answer 2

Deltoid Tuberosity of Hummerus

Question 3

Innervation of Deltoid

Answer 3

Axillary Nerve C5 c6

Question 4

Action of Deltoid

Answer 4

Clavicular- Anterior- flexes and medially rotates should joint
Acromial- Middle- abducts should joint
Spinal- Posterior- extends and laterally rotates shoulder joint

Question 5

Origin of Supraspinatus

Answer 5

Supraspinous fossa of Scapula

Question 6

Insertion of Supraspinatus

Answer 6

Superior Facet of Greater Tubercle of Humerus

Question 7

Innervation of Supraspinatus

Answer 7

Suprascapular Nerve c4 C5 c6

Question 8

Actions of Supraspinatus

Answer 8

Initiates and assists Deltoid in Abduction of shoulder joint and acts with other Rotator Cuff muscles

Question 9

Origin of Infraspinatus

Answer 9

Infraspinous fossa of Scapula

Question 10

Insertion of Infraspinatus

Answer 10

Middle facet of Greater Tubercle of Humerus

Question 11

Innervation of Infraspinatus

Answer 11

Suprascapular Nerve C5 c6

Question 12

Actions of Infraspinatus

Answer 12

Laterally rotate shoulder joint;

Help hold humeral head in glenoid cavity of Scapula

Question 13

Origin of Teres Minor

Answer 13

Middle part of Lateral border of Scapula

Question 14

Insertion of Teres Minor

Answer 14

Inferior Facet of Greater Tubercle of Humerus

Question 15

Innervation of Teres Minor

Answer 15

Axillary Nerve C5 c6

Question 16

Actions of Teres Minor

Answer 16

Laterally rotate shoulder joint;

Help hold humeral head in glenoid cavity of Scapula

Question 17

Origin of Teres Major

Answer 17

Inferior part of Lateral border of Scapula &

Posterior surface of Inferior Angle of Scapula

Question 18

Insertion of Teres Major

Answer 18

Medial lip of Intertubercular Sulcus of Humerus

Question 19

Innervation of Teres Major

Answer 19

Lower Subscapular Nerve c5 C6

Question 20

Actions of Teres Major

Answer 20

Adducts and medially rotates shoulder joint

Question 21

Origin of Subscapularis

Answer 21

Subscapular fossa (most Anterior surface of Scapula)

Question 22

Insertion of Subscapularis

Answer 22

Lesser Tubercle of Humerus

Question 23

Innervation of Subscapularis

Answer 23

Upper and Lower Subscapular Nerves c5 C6 c7

Question 24

Actions of Subscapularis

Answer 24

Medially rotates and adducts shoulder joint

helps hold Humeral Head in the Glenoid Cavity