GB 2. Anterior Abdomen + Surface Anatomy Flashcards
What are the planes of the anterior abdominal wall?
- Midclavicular Planes [2]
- Transpyloric Plane
- Subcostal Plane
- Intertubercular Plane
What are the 3 ways to find the transpyloric plane?
- midway between xiphoid process and umblicus
- midway between suprasternal notch and pubic symphysis
- where costal margin intersects the abdomen
What is the surface marking of the xiphoid process?
T10
What is the surface marking(s) of the bottom of the costal margin?
10th Rib
L2
What is the surface marking of the transpyloric plane?
L1
What is the surface marking of the subcostal plane?
L2/L3
What is the surface marking of the intertubercular plane?
L3
What is the surface marking of the iliac crests?
L5
What is the surface marking of the deep inguinal ring?
2cm above the femoral pulse at the inguinal ligament + lateral to the inferior epigastric artery
What are the 9 sections of the abdomen? Name them.
- Right Hypochondrium
- Right Flank
- Right Groin
- Epigastric
- Umbilical
- Pubic/Suprapubic
- Left Hypochondrium
- Left Flank
- Left Groin
What are the 4 quadrants of the abdomen?
- Right Upper
- Left Upper
- Right Lower
- Left Lower
What are the layers of the abdominal wall (from outside to inside)?
- Skin
- Superficial Fascia
- Camper’s Fascia
- Scarpa’s Fascia
- Deep Fascia
- External Oblique Muscle
- Internal Oblique Muscle
- Pyramidalis
- Rectus Abdominis
- Rectus Sheath
- Tranversus Abdominis
- Transversalis Fascia
- Extraperitoneal Fascia
- Parietal Peritoneum
- Peritoneal Cavity
- Visceral Peritoneum
Describe the function of Camper’s Fascia.
Fatty Layer
Turns into Dartos Fascia when it goes down to the scrotum
Describe the function of Scarpa’s Fascia.
Membranous Layer
Turns into Colle’s Fascia when it goes down to the scrotum
Also helps to form the Dartos Fascia
Name something that may happen with the Scarpa’s Fascia.
If there is the rupture of the penile urethra that leads to swelling under the fascia - urine enters the fascia
What are the flat muscles?
- External Oblique Muscle
- Internal Oblique Muscle
- Transversus Abdominis Muscle
What is the linea alba?
Where the flat muscles insert
alba = white - this means that there is little to no blood flow
What are the vertical muscles?
- Pyramidalis
2. Rectus Abdominis
What muscles form the rectus sheath? (anterior + posterior)
TOP: 3 - anterior - all ((Costal Margin and Above))
MIDDLE: Anterior: (1 1/2) -external [1] + internal [1/2]
Posterior: (1 1/2) - transversus [1] + internal [1/2] ((Below Ribs, but Above Arcuate Line))
BOTTOM: 3 - anterior - all ((Below Arcuate Line to Pubic Symphysis))
What is the nerve supply of the anterior abdominal wall? (the dermatomes)
It is supplied by nerves T7 to L1.
What is the blood supply of the anterior abdominal wall?
(1) Intercostal Arteries
(2) Epigastric Arteries
- Superior Epigastric
Artery
- Inferior Epigastric Arteru
What is the venous system of the anterior abdominal wall?
(1) Intercostal Veins
(2) Superior + Inferior Epigastric Veins
(3) Segmental Lumbar Veins (actually for posterior abdomen)
Describe the lymph drainage of the anterior abdominal wall.
Superiorly - Right + Left Axillary Nodes
Inferiorly - Right + Left Inguinal Nodes
What are the borders of the Inguinal Canal?
FLOOR - Inguinal Ligament
ROOF - Internal Oblique (arching over contents of inguinal canal to form conjoint tendon)
ANT. WALL - External Oblique (fortified laterally by Internal Oblique)
POST. WALL - Transversalis Fascia (fortified medially by Conjoint Tendon)