Scapulohumeral( intrisic Shoulder) Muscles

Question 0

Deltoid distal attachment

Answer 0

Deltoid tuberosity of humerus

Question 1

Deltoid proximal attachment

Answer 1

Lateral third of clavicle

Acromion and spine of scapula

Question 2

Deltoid intervention

Answer 2

Axillary nerve c5 c6

Question 3

Deltoid action

Answer 3

Clavicular(anterior) part flexes and medially rotates the arm
Acromial( middle) part abducts arm
Spinal(posterior) parts extends and laterally rotates arm

Question 4

Supraspinatus proximal attachment

Answer 4

Supraspinous fossa of scapula

Question 5

Supraspinous distal attachment

Answer 5

Greater tubercle of humerus (superior facet)

Question 6

Supraspinatus innervation

Answer 6

Suprascapular nerve c4 c5 c6

Question 7

Supraspinatus action

Answer 7

Initiates and assists deltoid in abduction of arm and acts with other rotator cuff muscles

Question 8

Infraspinatus proximal attachment

Answer 8

Infraspinous fossa of scapula

Question 9

Infraspinatus distal attachment

Answer 9

Greater tubercle of humerus (middle facet)

Question 10

Infraspinatus innervation

Answer 10

Suprascapular nerve c5 c6

Question 11

Infraspinatus action

Answer 11

Laterally rotate arm; help hold humeral head in glenoid cavity of scapula

Question 12

Teres minor proximal attachment

Answer 12

Middle part of lateral border of scapula

Question 13

Teres minor distal attachment

Answer 13

Greater tubercle of humerus(inferior facet)

Question 14

Teres minor innervation

Answer 14

Axillary nerve c5 c6

Question 15

Teres minor action

Answer 15

Laterally rotate arm; help hold humeral head in glenoid cavity of scapula

Question 16

Teres major proximal attachment

Answer 16

Posterior surface of inferior angle of scapula

Question 17

Teres major distal attachment

Answer 17

Medial lip of intertubercular groove of humerus

Question 18

Teres major innervation

Answer 18

Lower subscapular nerve c5c6

Question 19

Teres major action

Answer 19

Adducts and medially rotates arm

Question 20

Subscapularis proximal attachment

Answer 20

Subscapular fossa(most of the anterior surface of scapula)

Question 21

Subscapularis distal attachment

Answer 21

Lesser tubercle of the humerus

Question 22

Subscapularis innervation

Answer 22

Upper and lower subscapular nerves

C5c6c7

Question 23

Subscapularis action

Answer 23

Medially rotates and adducts arm

Help hold humeral head in glenoid cavity

Question 24

The tendons of the SITS blend with the joint capsule of the glenohumeral joint, reinforcing it as the musculotendinous rotator cuff, which...

Answer 24

Protects the joint and gives it stability. Tonic contraction of these muscles hold the relatively large head of the humerus firmly against the shallow glenoid cavity