The muscles of the anterolateral abdominal wall are divided into two main groups:
- Lateral flat muscle group situated on either side of the abdomen, which includes three muscles: external oblique, internal oblique and transversus abdominis .
- Anterior vertical muscles situated bilaterally to the median fibrous structure called linea alba. They are called rectus abdominis and pyramidalis muscles.
- Skin.
- Subcutaneous tissues (further divided into the more superficial Camper's fascia and the deeper Scarpa's fascia)
- External oblique muscle.
- Internal oblique muscle.
- Transversus abdominis muscle.
What are the 4 layers of abdominal muscles?
transverse abdominis. the muscle layer on the side of the abdomen, below the internal obliques, responsible for compressing the ribs to bend the spine sideways. rectus abdominis. Rectus abdominis: the double line of muscle the runs up the front of the abdomen, responsible for flexing the lower spine. internal obliques.
How to strengthen abdominal wall muscles?
- Start by sitting up in your chair toward the end of the seat.
- Sit up tall. Imagine lengthening from the crown of the head down through your hips.
- With control, engage your lower abdominals and lift one knee up 3 to 4 inches. Hold this position for 5 seconds.
- Lower the leg.
- Repeat on the other leg.
- Start by doing 6 to 8 on each leg. ...
How to repair torn muscles in the abdomen?
- wrap an ice pack in a towel or cloth
- apply the pack to the abdomen for 20 minutes
- repeat 2–3 times each day
What are the names of the abdominal muscles?
The four main abdominal muscle groups that combine to completely cover the internal organs include:
- transversus abdominis – the deepest muscle layer. ...
- rectus abdominis – slung between the ribs and the pubic bone at the front of the pelvis. ...
- external oblique muscles – these are on each side of the rectus abdominis. ...
- internal oblique muscles – these flank the rectus abdominis and are located just inside the hipbones. ...
What are the 3 major muscle pairs of the anterior abdominal wall?
Abdominal muscles explainedtransversus abdominis – the deepest muscle layer. ... rectus abdominis – slung between the ribs and the pubic bone at the front of the pelvis. ... external oblique muscles – these are on each side of the rectus abdominis.More items...
What makes up the anterior abdominal wall?
There are nine layers to the abdominal wall: skin, subcutaneous tissue, superficial fascia, external oblique muscle, internal oblique muscle, transversus abdominis muscle, transversalis fascia, preperitoneal adipose and areolar tissue, and peritoneum. Nerves, blood vessels, and lymphatics are present throughout.
What are the four muscles of anterior abdominal wall?
MusculatureOverview of the muscles of abdominal wallMuscleVascular supplyAnterior muscles (vertical muscles)Rectus abdominisSuperior and inferior epigastric arteriesPyramidalisInferior epigastric arteriesAnterolateral muscles (flat muscles)External obliqueLower intercostal, subcostal, and deep circumflex iliac arteries2 more rows•Jan 25, 2022
Which are muscles of the anterior abdominal wall quizlet?
External Oblique Muscle.Internal Oblique Muscle.Transversalis Muscle.Rectus Abdominus.
What are the muscles of the posterior abdominal wall?
The posterior abdominal wall primarily serves as protection for the retroperitoneal organs. It is mostly muscular contributed by the diaphragm, paraspinal, quadratus lumborum, iliacus, and psoas muscles.
Which is the deepest anterolateral muscle of the abdominal wall?
Transversus AbdominisTransversus Abdominis This is thinnest and deepest of the 3 anterolateral abdominal wall muscles. It originates from the lower 6 costal cartilages, lumbar vertebrae, iliac crests, and iliopsoas fascia. The fibers are oriented transversely and contribute to the rectus sheath medially.
Is the rectus abdominis anterior or posterior?
anterior abdominalRectus abdominis belongs to the anterior abdominal muscles together with pyramidalis muscle. But taking the functional anatomy into account, these two muscles comprise the anterolateral abdominal wall along with the three lateral abdominal muscles; external oblique, internal oblique and transversus abdominis.
Which of the following abdominal muscle is not a part of the anterior abdominal wall?
Okay, because the cuadrado's Lombardo is the deepest abdominal muscle and it is located in your lower back, on either side of the lumbar spine. Okay, so it does not belong to the anterior abdominal wall.
What are the 7 layers of the abdominal wall?
The abdominal wall. Though its major part is muscular, the abdominal wall consists of at least seven layers: the skin, subcutaneous fat, deep fascia; abdominal muscles, transversalis fascia, extraperitoneal fat, and the parietal peritoneum.
What is the abdominal wall?
In anatomy, the abdominal wall represents the boundaries of the abdominal cavity. The abdominal wall is split into the anterolateral and posterior walls. Diagram of sheath of Rectus above the arcuate line.
What are the four layers of abdominal muscles?
Classically the anterolateral abdominal wall has been described as separate layers from superficial to deep as follows:Skin.Subcutaneous tissues (further divided into the more superficial Camper's fascia and the deeper Scarpa's fascia)External oblique muscle.Internal oblique muscle.Transversus abdominis muscle.More items...•
Which of the following abdominal muscle is not a part of the anterior abdominal wall?
Okay, because the cuadrado's Lombardo is the deepest abdominal muscle and it is located in your lower back, on either side of the lumbar spine. Okay, so it does not belong to the anterior abdominal wall.
Which muscles are located in the midline of the anterolateral abdominal wall?
There are two vertical muscles located in the midline of the anterolateral abdominal wall – the rectus abdominis and pyramidalis.
What is the anteromedial aspect of the abdominal wall?
In the anteromedial aspect of the abdominal wall, each flat muscle forms an aponeurosis (a broad, flat tendon), which covers the vertical rectus abdominis muscle. The aponeuroses of all the flat muscles become entwined in the midline, forming the linea alba (a fibrous structure that extends from the xiphoid process of the sternum to the pubic symphysis).
What are the functions of the thoracoabdominal nerves?
Functions: Compression of abdominal contents. Innervation: Thoracoabdominal nerves (T7-T11), subcostal nerve (T12) and branches of the lumbar plexus. Vertical Muscles. There are two vertical muscles located in the midline of the anterolateral abdominal wall - the rectus abdominis and pyramidalis.
What is the abdominal wall?
The abdominal wall encloses the abdominal cavity and can be divided into anterolateral and posterior sections. The abdominal wall: Forms a firm, yet flexible boundary which keeps the abdominal viscera in the abdominal cavity and assists the viscera in maintaining their anatomical position against gravity. Protects the abdominal viscera from injury.
How does the abdominal viscera assist in forceful expiration?
Assists in forceful expiration by pushing the abdominal viscera upwards.
What are the two main groups of abdominal muscles?
The muscles of the anterolateral abdominal wall can be divided into two main groups: Flat muscles - three flat muscles , situated laterally on either side of the abdomen. Vertical muscles - two vertical muscles, situated near the mid-line of the body. Flat Muscles.
How many regions are there in the abdomen?
The abdomen is a large area, and so it split into nine regions – these are useful clinically for describing the location of pain, location of viscera and describing surgical procedures. The nine regions are formed by two horizontal and two vertical planes:
Which abdominal muscles are flat?
The external oblique muscle, the internal oblique muscle, and the transversus abdominis muscle are considered the flat abdominal muscles, and the fibers of each have varying orientations. All three of these abdominal muscles continue anteriorly and medially as aponeuroses. Aponeuroses are simply flat sheets of fibrous tissue ...
What are the two parts of the abdominal wall?
The abdominal wall is subdivided into the anterior wall, the right and left lateral walls, and the posterior wall.
Why is the transversus abdominis important?
And similar to both oblique muscles, the transversus abdominis helps to compress the abdominal contents in order to increase intra-abdominal pressure , which is helpful during forced expiration, defecation and labour.
What is the function of the musculoaponeurotic wall?
This musculoaponeurotic wall functions to enclose and protect the abdominal viscera, stabilize and contribute to movements of the trunk, and also increase the intra-abdominal pressure which is needed during urination , defecation, vomiting, and assisting in childbirth.
What is the abdominal wall?
The abdominal wall is subdivided into the anterior wall, the right and left lateral walls, and the posterior wall. These walls are musculoaponeurotic, meaning they are composed of muscles and fascial layers, except for the posterior wall which is also made up by the lumbar vertebral column. This musculoaponeurotic wall functions to enclose ...
Where is the rectus abdominis located?
The rectus abdominis is a set of vertically oriented paired muscles that lies right at the midline of the anterior abdominal wall and originates at the pubic symphysis and pubic crests and inserts at the xiphoid process and fifth through seventh costal cartilages.
Which muscle is fused in the midline?
The aponeuroses from the left and right flat abdominal muscles fuse in the midline to form the linea alba, which is latin for ‘white line’ and runs from the xiphoid process to the pubic symphysis.
Where is the anterolateral abdominal wall?
The anterolateral abdominal wall spans the anterior and lateral sides of the abdomen. It can be divided into several topographical areas, which are used to describe the location of abdominal organs and the pain associated with them:
Which muscle group is located on either side of the abdomen?
Lateral flat muscle group situated on either side of the abdomen, which includes three muscles: external oblique, internal oblique and transversus abdominis .
What are the two sections of the abdominal wall?
The abdominal wall can be divided into two sections: anterolateral and posterior abdominal walls. This complex structure consists of numerous layers, from superficial to deep: skin, superficial fascia, muscles and their respective fasciae, and peritoneum . Key facts about the abdominal wall. Layers of the abdominal wall.
What is the abdominal wall?
The abdominal wall surrounds the abdominal cavity, providing it with flexible coverage and protecting the internal organs from damage. It is bounded superiorly by the xiphoid process and costal margins, posteriorly by the vertebral column and inferiorly by the pelvic bones and inguinal ligament.
How are the abdominal regions divided?
Nine abdominopelvic regions, which are divided horizontally by the superior subcostal plane, which passes right under the costal margins of the 10th ribs, and the inferior intertubercular plane, which connects the tubercules of the iliac crest. Vertically they are divided by the two midclavicular planes which pass through the midpoint of each clavicle and halfway between the pubic symphysis and the anterior superior iliac spine. The four planes create nine abdominal regions as you see in the picture: hypochondriac (right, left) and epigastric regions superiorly, flanks (right, left) and umbilical region in the middle, groin (right, left) and hypogastric region inferiorly.
How many abdominal regions are there?
The four planes create nine abdominal regions as you see in the picture: hypochondriac (right, left) and epigastric regions superiorly, flanks (right, left) and umbilical region in the middle, groin (right, left) and hypogastric region inferiorly. The regions and quadrants of the abdomen (diagram)
Which fascia is firmly attached to the linea alba and pubic symphysis?
Deep Scarpa's fascia, which is a thinner and denser membranous layer overlying the muscle layer of the abdominal wall. It is firmly attached to the linea alba and pubic symphysis and fuses with the fascia lata (deep fascia of the thigh) right below the inguinal ligament.