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Abdominal Topography
CCRI-Newport Q13
| Question | Answer |
|---|---|
| This structure passes from the anterior superior iliac spine (ASIS) to the pubic tubercle. It is formed from the abdominal aponeuroses folding upon themselves. This folding results in a stronger structure. The inguinal canal passes through this structure. | Inguinal Ligament |
| There are two transverse planes commonly used to divide the abdomen into nine regions for study purposes. This is the name for the inferior of these two planes. It is at the level of lumbar 5 vertebral body. It may also be called the transtubercular plane | Intertubercular Plane |
| This is the name for the inferior edge of the rib cage. It includes the costal cartilages of ribs 7, 8, 9 and 10. At the midaxillary line it is at the level of rib 10. | Costal Margin |
| These abdominal areas are defined for study purposes. Two transverse planes and two parasagittal planes are used to define these areas. The superior transverse plane is called the subcostal plane and it is at the level of the body of L3 vertebra. The infe | Abdominal Regions |
| This landmark is about 2 inches along the line connecting the anterior superior iliac spine (ASIS) and the umbilicus, starting at the ASIS. This is roughly one third of the length of that line. Deep to this is normally where one would find the appendix. E | McBurney's Point |
| This feature runs along the midline on the anterior side of the abdomen from the xiphoid process to the pubic symphysis. It is where the aponeuroses of the three abdominal muscles from one side insert on the other side. The umbilicus is part of this struc | Linea Alba |
| This muscle is important because it is part of the composite muscle the iliopsoas, which is the prime flexor of the thigh. The origin is mostly the iliac fossa and a little on the ala of the sacrum. It inserts on the lesser trochanter of the femur. It is | Iliacus Muscle |
| This feature is an oblique tubular passage from the body cavity to the subcutaneous area between the thigh and the pelvis. In males it is important because it is through this that the testicle descends to the scrotum during development. After that it has | Inguinal Canal |
| This structure is of significance because it is the place where the inferior end of the inguinal ligament attaches. It is the origin for adductor longus. | Pubic Tubercle |
| This is the name for the situation when abdominal structures descend through the inguinal canal to the subcutaneous area inferior to the canal. In males the structure may end up in the scrotal sac. This condition is significantly more common in males due | Inguinal Hernia |
| The anterior portion of outer lip of this landmark is the origin for the tensor fasciae latae. | Iliac Tubercle |
| This muscle is a combination of the psoas major and the iliacus. It is the prime flexor of the thigh. | Iliopsoas Muscle |
| If one were to divide the abdomen into 9 segments, this segment would be the inferior middle region of the abdomen, having the left and right iliac regions lateral to it. It is sometimes called the pubic region. | Hypogastric Region |
| This action occurs when the muscles of the abdominal wall contract at the same time. The increase in abdominal pressure aids in several activities that include; expiration, coughing, regurgitation, micturition, defecation parturition. | Abdominal Press |
| If one were to divide the abdomen into 9 segments, this segment would be the superior middle region of the abdomen, having the left and right hypochondriac regions lateral to it. | Epigastric Region |
| This muscle is of particular importance because it merges with the iliacus to form the iliopsoas which is the prime flexor of the thigh. It is known as the tenderloin behind the meat counter of markets. | Psoas Major Muscle |
| This structure has three segments that are formed from six bones. It is on the anterior side of the bony thorax and forms part of the axial skeleton. | Sternum |
| This structure extends from the anterior superior iliac spine posteriorly to the posterior superior iliac spine. It serves as an origin and insertion for a number of muscles. | Iliac Crest |
| This structure is the scar where the umbilical cord met the abdominal wall at the linea alba. It is at the level of the intervertebral disc between lumbar 3 and lumbar 4 vertebrae. It is the site of hernias in some individuals. | Umbilicus |
| This structure is important because the intertubercle plane runs through it. This is one of the planes used to divide the abdomen into nine regions. | Lumbar Vertebra 5 Body |
| The four divisions of this muscle on each side of the abdominal wall result from three tendinous intersections of this muscle. The muscle is enclosed within the aponeurosis of the internal abdominal oblique, much like sandwich meat in a pita pocket. Funct | Rectus Abdominis Muscle |
| This muscle is of particular importance because it merges with the psoas major to form the iliopsoas which is the prime flexor of the thigh. We did not see this muscle separate from the iliopsoas muscle in lab, but it is an important muscle none the less. | Iliacus Muscle |
| This is the name for the three abdominal aponeuroses on the anterior side of the abdominal wall. | Rectus Sheath |
| If the abdomen is divided into nine regions, this region is the middle region of the abdomen, having the left and right lumbar regions adjacent to it. | Umbilical Region |
| This structure is the most inferior of the sternebrae. In a young person it is hyaline cartilage, but is bone by the time one is 40 years old. It is sometimes broken when a person receives CPR. It is part of the origin for the diaphragm and insertion for | Xiphoid Process |
| This muscle is the most dorsal of the three posterior abdominal wall muscles. It can be seen in two places in the cat. It can be seen in the thoracic cavity running along the vertebral border and it can be found dorsal to the psoas major in the abdomen. I | Quadratus Lumborum Muscle |
| There are two transverse planes commonly used to divide the abdomen into nine regions for study purposes. This is the superior of these. It is at the level of lumbar 3 vertebral body. | Subcostal Plane |
| This is the name for two abdominal regions if it is divided into nine regions. There is a left and right with this name. They are inferior to the intertubercular plane and lateral to the hypogastric region. They are sometimes called inguinal regions or th | Iliac Regions (Left and Right) |
| This muscle is the most ventral of the three posterior abdominal wall muscles. It is missing in about 40% of the population. | Psoas Minor Muscle |
| If one were to divide the abdomen into 9 segments, these segments would be lateral, both left and right, to the epigastric region and superior to the subcostal plane. They are sometimes called hypochondrium. | Hypochondriac Regions (Left and Right) |
| This is the superficial layer of abdominal muscle at the midaxillary line. Its fibers are oblique, directed inferiorly as they approach the anterior midline. It is continuous with the external intercostal muscle. | External Abdominal Oblique Muscle |
| This is the deep layer of abdominal muscle at the midaxillary line. Its fibers are primarily transverse as they approach the anterior midline. It is continuous with the innermost intercostal muscle. | Transverse Abdominis Muscle |
| This is the intermediate layer of abdominal muscle at the midaxillary line. Its fibers are oblique, directed superiorly as they approach the anterior midline. It is continuous with the internal intercostal muscle. | Internal Abdominal Oblique Muscle |
| This is the level where the diaphragm meets the thoracic wall along the midaxillary line. | Rib 10, Midaxillary, Left and Right |
| This structure is important because the subcostal plane runs through it. This is one of the planes used to divide the abdomen into nine regions. | Lumbar Vertebra 3 Body |
| This feature is an opening through the aponeuroses of the inguinal ligament. It is positioned medial and inferior to the internal inguinal ring, which makes the structure stronger than if they were lined up opposite each other. | External Inguinal Ring |
| If one were to divide the abdomen into 9 segments, these segments would be inferior to the subcostal plane and superior to the intertubercular plane. They are lateral, both left and right, to the umbilical region. They are sometimes called the flank. | Lumbar Regions (Left and Right) |
| This describes the anatomy of the rectus abdominis muscle. | 4 Segments on Each Side |
| This feature is an opening into the inguinal canal on the deep side of the inguinal ligament. It is positioned lateral and superior to the external inguinal ring, which makes the structure stronger than if they were lined up opposite each other. | Internal Inguinal Ring |
| This structure is important because the transpyloric line runs through it. This is the plane at the inferior border of the abdominal volume that is mostly protected by the ribs. | Lumbar Vertebra 1 Body |
| A transverse plane at the level of lumbar 1 vertebral body and rib 9 intersects lateral boundary of the rectus abdominis muscle. It’s superior to the subcostal plane and runs through the left & right hypochondriac regions as well as the epigastric region. | Transpyloric Line (TPL) |
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kboyer
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