Muscles of Upper Limbs and Pectoral Girdle

Question 1

Muscles of the rotator cuff

Answer 1

Supraspinatus, infraspinatus, subscapularis, and teres minor

Question 2

OIA of Supraspinatus muscle

Answer 2

O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: abducts arm and stabilizes glenohumeral joint

Question 3

OIA of Infraspinatus muscle

Answer 3

O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: laterally rotates arm and stabilizes glenohumeral joint

Question 4

OIA of subscapularis muscle

Answer 4

O: subscapular fossa of scapula
I: lesser tubercle of humerus
A: medially rotates and stabilizes glenohumeral joint

Question 5

OIA of teres minor

Answer 5

O: axillary border of scapular
I: greater tubercle of humerus
A: laterally rotates and adducts arm and stabilizes glenohumeral joint

Question 6

Muscles of rotator cuff from the back from superior to inferior

Answer 6

supraspinatus, infraspinatus, teres minor

Question 7

Which muscle of the rotator cuff do you see from the front view?

Answer 7

the subscapularis

Question 8

Label which muscle is which

Answer 8

1. supraspinatus
2. infraspinatus
3. teres minor
4. subscapularis

Question 9

Which muscle is this?

Answer 9

the subscapularis muscle

Question 10

What muscle is this? What’s its OIA?

Answer 10

Deltoid
O: clavicle, acromion process, and spine of scapula
I: deltoid tuberosity of humerus
A: abducts, flexes and extends, medially and laterally rotates arm

Question 11

What muscle is this? OIA?

Answer 11

Pectoralis major
O: clavicle, sternum, and costal cartilages of upper ribs
I: greater tubercle of humerus
A: flexes, adducts, and medially rotates arm

Question 12

What muscle is this?

Answer 12

Latissimus dorsi
O: None
I: None
A: extends, adducts, and medially rotates arm

Question 13

What muscle is this? OIA?

Answer 13

rhomboid major
O: spinous process of upper thoracic vertebrae
I: vertebral border of scapula
A: rotates and retracts scapula

Question 14

What muscle is this? OIA

Answer 14

rhomboid minor
O: spinous process of lower cervical and upper thoracic vertebrae
I: vertebral border of scapula
A: rotates and retracts scapula

Question 15

What muscle is this?

Answer 15

Rhomboid minor

Question 16

What muscle is this? OIA?

Answer 16

trapezius
O: None
I: None
A: elevates, depresses, rotates, and retracts scapula

Question 17

What muscle is this? OIA?

Answer 17

Levator scapulae
O: transverse processes of cervical vertebrae
I: vertebral border of scapula
A: elevates scapula

Question 18

What muscle is this? OIA?

Answer 18

Serratus anterior
O: outer surface of ribs 1-9
I: entire length of vertebral border of scapula
A: protracts and rotates scapula

Question 19

What muscle is this ? OIA?

Answer 19

Pectoralis minor
O: anterior surface of upper middle ribs
I: coracoid process of scapula
A: depresses, protracts, and rotates scapula