Abdominal Wall And Diapragm Flashcards
What are the components of the abdominal wall
Musculoponeurotic walls
Diaphragm
Pelvic floor muscles
Lumbar section of vertebral column
What is internal pressure controlled by
Voluntary or reflexively by the contraction/ relaxation of the diaphragm and anterolateral walls
How many quadrants are there in the abdomen
4: created by the imaginary lines of the median plane and transumbilical plane
How many regions are on the abdomen
9 regions created by two horizontal lines and two vertical midclavicular lines
What is the subcostal plane
Touching the inferior border of the 10th costal cartilage on both sides
What is the transtubercular plane
Tubercle on the iliac crest, goes through the body of the 5th lumbar vertebra
What are the functions of the muscles of anterior abdominal wall
Form a strong expandable support
Protect the abdominal viscera
Oppose the diaphragm
Move the trunk/maintain posture
What is the anterolateral abdominal wall bounded by
SUPERIORLY cartilage of the 7-10 rib and xiphoid process
Inferiorly by the inguinal ligament and superior margin of the anterolateral aspect of the pelvic girdle
What does the Rectus abdominis do
Compresses the viscera but can flex the trunk In the lumbar region
What does the pyramidalis muscle do
Draws the linea alba downward toward the pubis
Where the the external oblique muscle run
Ribs 5-12 to the iliac crest and pubis and also attached to linea alba
What is the linea semilunaris
Lateral limits of the Rectus sheath more apparent in lean individuals
What do the inguinal ligament do
Holds down the structures passing between the pelvis and thigh
What does the inguinal ligament represent
A thickening of external oblique aponeurosis running from ASIS to the pubis tubercle
What is the Rectus sheath
Strong incomplete fibrous compartment of the Rectus abdominus and pyramidalis muscles
What arteries and veins are within Rectus sheath
Inferior and superior epigastric artery and vein
What is the line of demarcation
The Arcuate line
What are the components of the Rectus sheath
External abdominal oblique and aponeurosis
Internal abdominal oblique and aponeurosis
Transverse abdominal and aponeurosis
What are the only things inferior to actuate line
Transversalis fascia
Parietal perineum
Arterial supply ti the abdominal was starts as Internal thoracic and splits to what
Musculophrenic and superior epigastric a
Anterolateral supply to the abdominal wall via abdominal aorta splits to
Posterior intercostal aa (these travel with anterior rami of lower thoracic spinal nerves along inferior edge of ribs
Arterial supply to abdominal wall via external iliac / femoral is what
Superior epigastric a
Circumflex iliac a
Inferior epigastric a
The anterior rami of spinal nerves T7-T12 travel within what
Posterior thoracic wall
Lower intercostal nerves reach the costal margin and continue traveling anteromedially as what
Thoraciabdominal nerves
