Lab 2 Muscles

Question 1

Origin of Latissimus Dorsi

Answer 1

T7 spinous process through sacrum

Question 2

Insertion of Latissimus Dorsi

Answer 2

Intertubercular groove of humerus

Question 3

Action of Latissimus Dorsi

Answer 3

Adduction, Extension and Medial rotation of shoulder

Question 4

Origin of Teres Major

Answer 4

Lateral border of scapula

Question 5

Insertion of Teres Major

Answer 5

Intertubercular groove of humerus

Question 6

Action of Teres Major

Answer 6

Extends shoulder

Question 7

Origin of Pectoralis Major

Answer 7

Clavicle; Sternum; True ribs

Question 8

Insertion of Pectoralis Major

Answer 8

Intertubercular groove of humerus

Question 9

Action of Pectoralis Major

Answer 9

Shoulder medial rotation and adduction

Question 10

Origin of Deltoid

Answer 10

Clavicle; accordion process and spine of scapula

Question 11

Insertion of Deltoid

Answer 11

Deltoid tuberosity

Question 12

Action of Deltoid

Answer 12

Abducts Shoulder

Question 13

Origin of Supraspinatus

Answer 13

Supraspinous fossa of scapula

Question 14

Insertion of Supraspinatus

Answer 14

Greater tubercle of humerus

Question 15

Action of Supraspinatus

Answer 15

Abducts shoulder

Question 16

Origin of Infraspinatus

Answer 16

Infraspinous fossa of scapula

Question 17

Insertion of Infraspinatus

Answer 17

Greater tubercle of humerus

Question 18

Action of Infraspinatus

Answer 18

Laterally rotates shoulder

Question 19

Origin of Teres Minor

Answer 19

Lateral border of scapula

Question 20

Insertion of Teres Minor

Answer 20

Greater tubercle of humerus

Question 21

Action of Teres Minor

Answer 21

Laterally rotates shoulder

Question 22

Origin of Subscapularis

Answer 22

Subscapular fossa of scapula

Question 23

Insertion of Subscapularis

Answer 23

Lesser tubercle of humerus

Question 24

Action of Subscapularis

Answer 24

Medially rotates shoulder