Thorax, Abdomen, Pelvis

Front 1

Intercostal: PA

Back 1

Ribs - Inferior Border

Front 2

Intercostal: DA

Back 2

Ribs Below - Superior Border

Front 3

Intercostal: I

Back 3

Intercostal Nerve

Front 4

Intercostal: A

Back 4

Approximation of the Ribs

Front 5

Transversus Thoracis: PA

Back 5

Sternum - Posterior Surface

Front 6

Transversus Throacis: DA

Back 6

Ribs 2-6 - Internal Surface of Costal Cartilages

Front 7

Transversus Thoracis: I

Back 7

Intercostal Nerve

Front 8

Transversus Thoracis: A

Back 8

Weakly Depresses Ribs

Front 9

Subcostal: PA

Back 9

Lower Ribs - Internal Surface Near Angles

Front 10

Subcostal: DA

Back 10

Ribs 2 or 3 Below - Superior Borders

Front 11

Subcostal: I

Back 11

Intercostal Nerve

Front 12

Subcostal: A

Back 12

Similar to Internal Intercostal

Front 13

Diaphragm: CA

Back 13

Central Tendon

Front 14

Diaphragm: Peripheral A.

Back 14

Sternal:
-Sternum - Xiphoid Process
Costal:
-Interdigitations with Transverse Abdominus
-Costal Cartilages & Adjacent Areas of Ribs 7-12
Lumbar:
-Lumbar Vertebrae
-Arcuate Ligaments

Front 15

Diaphragm: I

Back 15

Phrenic Nerve (C3-C5)

Front 16

Diaphragm: A

Back 16

Depression (Increases Thoracic Volume and Decreases Abdominal Volume)

Front 17

External Oblique: O

Back 17

Ribs 5-12 - External Surfaces

Front 18

External Oblique: I

Back 18

Linea Alba
Pubis - Pubic Tubercle
Ilium - Anterior 1/3 of Iliac Crest

Front 19

External Oblique: N

Back 19

Ventral Rami of Inferior 6 Thoracic Spinal Nerves
Subcostal Nerve

Front 20

External Oblique: A

Back 20

Unilateral: Contralateral Trunk Rotation
Bilateral: Trunk Flexion
Compress and Support Abdominal Viscera

Front 21

Internal Oblique: O

Back 21

Thoracolumbar Fascia
Anterior 2/3 of Iliac Crest
Lateral 1/2 of Inguinal Ligament

Front 22

Internal Oblique: I

Back 22

Ribs 10-12 - Inferior Borders
Linea Alba
Pectin Pubis via Conjoint Tendon

Front 23

Internal Oblique: N

Back 23

Ventral Rami of Inferior 6 Thoracic Spinal Nerves

Front 24

Internal Oblique: A

Back 24

Unilateral: Ipsilateral Trunk Rotation
Bilateral: Trunk Flexion
Compress and Support Abdominal Viscera

Front 25

Transverse Abdominal: O

Back 25

Internal Surfaces of Costal Cartilages of 7-12
Thoracolumbar Fascia
Iliac Crest
Lateral 1/3 of Inguinal Ligament

Front 26

Transverse Abdominal: I

Back 26

Linea Alba with Aponeurosis of Internal Oblique
Pubic Crest
Pectin Pubis via Conjoint Tendon

Front 27

Transverse Abdominal: N

Back 27

Ventral Rami of Inferior 6 Thoracic Spinal Nerves

Front 28

Transverse Abdominal: A

Back 28

Compress and Support Abdominal Viscera

Front 29

Rectus Abdominis: O

Back 29

Pubic Symphysis and Crest

Front 30

Rectus Abdominis: I

Back 30

Xiphoid Process of Sternum
Costal Cartilages of Ribs 5-7

Front 31

Rectus Abdominis: N

Back 31

Ventral Rami of Inferior 6 Thoracic Spinal Nerves

Front 32

Rectus Abdominis: A

Back 32

Trunk Flexion
Compress and Support Abdominal Viscera

Front 33

Quadratus Lumborum: SA

Back 33

Transverse Processes of Lumbar Vertebrae
Inferior Border of Medial 1/2 of Rib 12

Front 34

Quadratus Lumborum: IA

Back 34

Iliolumbar Ligament
Iliac Crest

Front 35

Quadratus Lumborum: I

Back 35

Ventral Rami of T12, L1-L4 Spinal Nerves

Front 36

Quadratus Lumborum: A

Back 36

Unilateral - Trunk Lateral Flexion
Bilateral - Trunk Extension. Depress and Stabilize Rib 12

Front 37

Levator Ani: I

Back 37

Nerve to Levator Ani (S4)
Infeiror Anal (Rectal) Nerve
Coccygeal Plexus

Front 38

Levator Ani: A

Back 38

Helps to Support Pelvic Viscera
Resists Increases in Intra-Abdominal Pressure

Front 39

Coccygeus: I

Back 39

Branches of S4 & S5 Spinal Nerves

Front 40

Coccygeus: A

Back 40

Forms Small Part of Pelvic Diaphragm that Supports Pelvic Viscera
Coccygeal Flexion