Chest/Torso

Question 1

serratus posterior inferior: Origin

Answer 1

vertebrae T11 - L3

Question 2

serratus posterior inferior: Insertion

Answer 2

the inferior borders of the 9th through 12th ribs

Question 3

serratus posterior inferior: Nerve

Answer 3

intercostal nerves

Question 4

serratus posterior inferior: Action

Answer 4

depress the lower ribs, aiding in expiration

Question 5

serratus posterior superior: Origin

Answer 5

nuchal ligament (or ligamentum nuchae) and the spinous processes of the vertebrae C7 through T3

Question 6

serratus posterior superior: Insertion

Answer 6

the upper borders of the 2nd through 5th ribs

Question 7

serratus posterior superior: Nerve

Answer 7

2nd through 5th intercostal nerves

Question 8

serratus posterior superior: Action

Answer 8

elevate the ribs which aids in inspiration

Question 9

external oblique: Origin

Answer 9

Lower 8 costae

Question 10

external oblique: Insertion

Answer 10

Crista iliaca, ligamentum inguinale

Question 11

external oblique: Nerve

Answer 11

intercostal nerves T5, T6, T7, T8, T9, T10, T11, subcostal nerve (T12)

Question 12

external oblique: Action

Answer 12

Rotates torso

Question 13

internal oblique: Origin

Answer 13

inguinal ligament, iliac crest and the lumbodorsal fascia

Question 14

internal oblique: Insertion

Answer 14

linea alba, xyphoid process and the inferior ribs.

Question 15

internal oblique: Nerve

Answer 15

intercostal nerves T8, T9, T10, T11, subcostal nerve (T12), iliohypogastric nerve, ilioinguinal nerve

Question 16

internal oblique: Action

Answer 16

Compresses abdomen and rotates vertebral column.

Question 17

transversus abdominis: Origin

Answer 17

ribs and the iliac crest

Question 18

transversus abdominis: Insertion

Answer 18

inserts into the pubic tubercle via the conjoint tendon, also known as the falx inguinalis

Question 19

transversus abdominis: Nerve

Answer 19

intercostal nerves T7, T8, T9, T10, T11, subcostal nerve (T12), iliohypogastric nerve, ilioinguinal nerve, genitofemoral nerve

Question 20

transversus abdominis: Action

Answer 20

compress the ribs and viscera, providing thoracic and pelvic stability

Question 21

rectus abdominis*: Origin

Answer 21

pubis

Question 22

rectus abdominis*: Insertion

Answer 22

costal cartilages of ribs 5-7, xiphoid process of sternum

Question 23

rectus abdominis*: Nerve

Answer 23

segmentally by thoraco-abdominal nerves (T7, T8, T9, T10, T11, T12)

Question 24

rectus abdominis*: Action

Answer 24

flexion of trunk/lumbar vertebrae

Question 25

quadratus lumborum: Origin

Answer 25

iliac crest and iliolumbar ligament

Question 26

quadratus lumborum: Insertion

Answer 26

last rib and transverse processes of lumbar vertebrae

Question 27

quadratus lumborum: Nerve

Answer 27

anterior branches of T12, L1, L2, L3, L4

Question 28

quadratus lumborum: Action

Answer 28

Alone, lateral flexion of vertebral column; Together, depression of thoracic rib cage

Question 29

Pectoralis major*: Origin

Answer 29

anterior surface of the medial half of the clavicle. | Sternocostal head: anterior surface of the sternum, the superior six costal cartilages

Question 30

Pectoralis major*: Insertion

Answer 30

intertubercular groove of the humerus

Question 31

Pectoralis major*: Nerve

Answer 31

lateral pectoral nerve and medial pectoral nerve Clavicular head: C5 and C6 Sternocostal head: C7, C8 and T1

Question 32

Pectoralis major*: Action

Answer 32

Clavicular head: flexes the humerus Sternocostal head: extends the humerus As a whole, adducts and medially rotates the humerus. It also draws the scapula anteriorly and inferiorly.

Question 33

pectoralis minor*:Origin

Answer 33

3rd to 5th ribs, near their costal cartilages

Question 34

pectoralis minor*: Insertion

Answer 34

medial border and superior surface of the coracoid process of the scapula

Question 35

pectoralis minor*: Nerve

Answer 35

Medial pectoral nerves (C8, T1)

Question 36

pectoralis minor*: Action

Answer 36

stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall

Question 37

subclavius: Origin

Answer 37

first rib

Question 38

subclavius: Insertion

Answer 38

subclavian groove of clavicle

Question 39

subclavius: Nerve

Answer 39

nerve to subclavius

Question 40

subclavius: Action

Answer 40

Depresses the clavicle

Question 41

serratus anterior: Origin

Answer 41

fleshy slips from the outer surface of upper 8 or 9 ribs

Question 42

serratus anterior: Insertion

Answer 42

costal aspect of medial margin of the scapula

Question 43

serratus anterior: Nerve

Answer 43

long thoracic nerve (from roots of brachial plexus C5, C6, C7)

Question 44

serratus anterior: Action

Answer 44

protract and stabilize scapula, assists in upward rotation

Question 45

internal intercostales: Origin

Answer 45

rib - inferior border

Question 46

internal intercostales: Insertion

Answer 46

rib - superior border

Question 47

internal intercostales: Nerve

Answer 47

intercostal nerves

Question 48

internal intercostales: Action

Answer 48

hold ribs steady

Question 49

external intercostales: Origin

Answer 49

ribs 1-11

Question 50

external intercostales: Insertion

Answer 50

ribs 2-12

Question 51

external intercostales: Nerve

Answer 51

ntercostal nerves

Question 52

external intercostales: Action

Answer 52

??? nothing listed for this