What is linea semilunaris in abdomen?
The linea semilunaris is a vertical, curved structure that runs along the lateral edges of the rectus abdominis muscle in the anterior abdominal wall. It is the site of union where tendons of the lateral abdominal muscles meet the sheath surrounding the rectus abdominis muscle, also known as the rectus sheath.
How is linea semilunaris formed?
It is formed by the aponeurosis of the internal oblique at its line of division to enclose the rectus. This is reinforced anteriorly by the external oblique, and posteriorly by the transversus abdominis above the arcuate line.
Which line is the linea alba?
—The linea alba is a tendinous raphé in the middle line of the abdomen, stretching between the xiphoid process and the symphysis pubis. It is placed between the medial borders of the Recti, and is formed by the blending of the aponeuroses of the Obliqui and Transversi.
Where is arcuate line present?
The arcuate line, also known as the semicircular line of Douglas, is a curved line found posterior to the rectus abdominis muscle bilaterally, at about one-third of the distance between the umbilicus and the pubic symphysis. This anatomical finding may not always be present, and its position may vary.
What is the linea alba and tendinous intersections?
The linea alba is a band of connective tissue that divides the two halves of the muscle vertically. The linea semilunaris is the tendinous intersection that separates the lateral edge of the muscle from the external oblique and internal oblique muscles that lie on the lateral surface of the anterior abdominal wall.
What is the arcuate line of the pelvis?
The arcuate line of the ilium is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the iliac fossa and Iliacus muscle. It forms part of the border of the pelvic inlet. In combination with the pectineal line, it comprises the iliopectineal line.
What is the line called when you are pregnant?
This line is called the linea alba. You’ve always had it, but before your pregnancy it was too light to see. When melanin production increases during pregnancy, the line gets darker and more obvious. Then it’s called the linea nigra.
What is linea alba pregnancy?
Prior to line prior to pregnancy is light or pale line is called the linea alba (white line). It runs from your navel to the pubic bone. It darkens during pregnancy acquiring the name linea nigra (black line). The pregnancy line is never really black, however, it is brownish and darker in color.
What makes the arcuate line?
The arcuate line is the inferior margin of the posterior leaflet of the rectus sheath within the abdomen. The posterior leaflet of the sheath is formed, superficial to deep, from the: posterior part of the internal oblique aponeurosis. transversus abdominis aponeurosis.
What is arcuate line of pelvis?
The arcuate line of the ilium is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the iliac fossa and Iliacus muscle. Arcuate line (ilium) Male pelvis.
What is Tendinous intersection?
The tendinous intersections, in conjunction with the rectus abdominis, function to provide varying degrees of forward flexion to the lumbar region of the vertebral column, producing forward bending at the waist. Forward flexion results in a decreased angle between the trunk and lower body.
Why is linea alba?
Linea alba is evidence of irritation inside your mouth. Typically, it’s caused by chronic (long-term) friction between your teeth and the lining of your cheek, also known as your buccal mucosa. It can also be caused by other sources of friction in the mouth, such as: dentures that rub against each other.
Why is the arcuate line important?
It is roughly positioned half way between the umbilicus and the pubic crest. Clinically, the arcuate line is important as the: site of entry of the inferior epigastric artery into the rectus sheath. site of weakness: site of Spigelian hernia.
What level is arcuate line?
The arcuate line was found to lie at 74.6% of the distance from the pubic symphysis to the umbilicus, and 32.7% of the distance from the pubic symphysis to the xiphoid. This location was 1.8 +/- 1.7 cm superior to the level of the anterior superior iliac spines (ASIS).
Why do I have a pregnancy line but not pregnant?
It’s likely caused by shifts in hormones. The increase in hormones causes melanin-producing cells in the skin to produce more pigment. Because the linea alba is always present (it’s just too light to be seen), the increased pigment makes the line very obvious. For most people, the line will disappear on its own.
What is the black line on pregnant belly?
Increased melanin production is what makes your skin change color during pregnancy. At some point during your second trimester, you may notice a dark brown line running down the middle of your abdomen, between your belly button and pubic area. This line is called the linea alba.
Does everyone get a pregnancy line?
Anyone can develop a dark line down their belly, although women with fair skin are less likely to have it than women with darker complexions. Women with fair skin who develop linea nigra may experience development a comparatively lighter color than women with darker skin.
What is Tendinous?
Definition of tendinous 1 : consisting of tendons : sinewy tendinous tissue. 2 : of, relating to, or resembling a tendon.
How do you remove linea alba?
Some of the things you might have to do include stopping certain habits, such as biting your cheeks or being overly aggressive in your oral hygiene. Alternatively, your dental professional may have to make adjustments or changes to your dentures and orthodontic appliances (braces).
Why do I feel a line inside my cheek?
Causes of linea alba inside your cheeks Typically, it’s caused by chronic (long-term) friction between your teeth and the lining of your cheek, also known as your buccal mucosa. It can also be caused by other sources of friction in the mouth, such as: dentures that rub against each other.