Table 7.2 Muscles Of The Trunk

Question 1

Origin of Erector Spinae

Answer 1

Vertebrae, pelvis

Question 2

Insertion of Erector Spinae

Answer 2

Superior vertebrae, ribs

Question 3

Action of Errector Spinae

Answer 3

Maintains erect posture of vertebral column

Question 4

Scalene

Answer 4

Scalenus anterior
Scalenus medius
Scalenus posterior

Question 5

Origin of scalene

Answer 5

Cervical vertebrae

Question 6

Insertion of scalene

Answer 6

First two ribs

Question 7

Action of scalene

Answer 7

Raise ribs and expand thorax

Question 8

Origin of external intercostals

Answer 8

Ribs

Question 9

Insertion of external intercostals

Answer 9

Next rib

Question 10

Action of External intercostals

Answer 10

Expand thorax

Question 11

Origin of Internal intercostals

Answer 11

Ribs

Question 12

Insertion of of internal intercostals

Answer 12

Next rib

Question 13

Action of of Internal intercostals

Answer 13

Compress thorax

Question 14

Origin of Rectus abdominis

Answer 14

Pubis

Question 15

Insertion of Rectus abdominis

Answer 15

Sternum and 5th and 7th ribs

Question 16

Action of Rectus abdominis

Answer 16

Flexes vertebral and column increases pressure on abdomen

Question 17

Origin of transversus abdominis

Answer 17

Last 5 or 6 ribs

Question 18

Insertion of transversus abdominis

Answer 18

Pubis

Question 19

Action of transversus abdominis

Answer 19

Compresses abdomen

Question 20

Origin of internal oblique

Answer 20

Iliac crest

Question 21

Insertion of internal oblique

Answer 21

Last 3 ribs

Question 22

Action of internal oblique

Answer 22

Compresses abdomen

Question 23

Origin of external oblique

Answer 23

Last 8 ribs

Question 24

Insertion of external oblique

Answer 24

Iliac crest

Question 25

Action of external oblique

Answer 25

Compresses abdomen

Question 26

Origin of Rhomboideus

Answer 26

Vertebrae

Question 27

Insertion of Rhomboideus

Answer 27

Scapula

Question 28

Action of Rhomboideus

Answer 28

Retracts Scapula

Question 29

Origin of Levator scapula

Answer 29

Vertebrae

Question 30

Insertion of Levator scapula

Answer 30

Scapula

Question 31

Action of Levator scapula

Answer 31

Raises scapula

Question 32

Origin of serratus anterior

Answer 32

Ribs

Question 33

Insertion of serratus anterior

Answer 33

Scapula

Question 34

Action of serratus anterior

Answer 34

Protracts scapula

Question 35

Origin of pectoralis major

Answer 35

Clavicle,sternum, first 6 ribs

Question 36

Insertion of pectoralis major

Answer 36

Greater tubercle of humerus

Question 37

Action of Pectoralis major

Answer 37

Controls the movement of the arm, adducts and medically rotates arm

Question 38

Origin of pectoralis minor

Answer 38

Ribs

Question 39

Insertion of pectoralis minor

Answer 39

Scapula

Question 40

Action of pectoralis minor

Answer 40

Depresses scapula

Question 41

Origin of teres major

Answer 41

Scapula

Question 42

Insertion of teres major

Answer 42

Humerus

Question 43

Action of teres major

Answer 43

Extends shoulders

Question 44

Origin of Latissimus dorsi

Answer 44

Vertebrae

Question 45

Insertion of Latissimus dorsi

Answer 45

Humerus

Question 46

Action of Latissimus dorsi

Answer 46

Extends shoulders and abducts arm

Question 47

Origin of supraspinatus

Answer 47

Scapula

Question 48

Insertion of supraspinatus

Answer 48

Humerus

Question 49

Action of supraspinatus

Answer 49

Abducts arm

Question 50

Origin of infraspinatus

Answer 50

Scapula

Question 51

Insertion of infraspinatus

Answer 51

Humerus

Question 52

Action of infraspinatus

Answer 52

Extends and rotates arm

Question 53

Erector spinae

Answer 53

Iliocostalis
Longissimus
Spinalis