What are Semilunar lines?
What are Semilunar lines?
The semilunar line, linea semilunaris or Spigelian line is a bilateral vertical curved line in the anterior abdominal wall where the layers of the rectus sheath fuse lateral to the rectus abdominis muscle and medial to the oblique muscles.
What forms the linea semilunaris?
Structure. The linea semilunaris corresponds with the lateral border of the rectus abdominis muscle. It extends from the cartilage of the ninth rib to the pubic tubercle. It is formed by the aponeurosis of the internal oblique at its line of division to enclose the rectus.
What is Linea Semicircularis?
The arcuate line of the abdomen (or linea semicircularis) is a horizontal line that demarcates the lower limit of the posterior layer of the rectus sheath. It is also where the inferior epigastric vessels perforates the rectus abdominus.
What are the linea alba and linea semilunaris?
The linea alba separates the right and left rectus abdominis muscles. Linea semilunaris forms the lateral border of the rectus abdominis muscles bilaterally. The rectus sheath, which covers the rectus abdominis muscle, is comprised of both anterior and posterior layers.
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.
How is linea alba formed?
In humans, the linea alba runs from the xiphoid process to the pubic symphysis down the midline of the abdomen. The name means white line as it is composed mostly of collagen connective tissue, which has a white appearance. It is formed by the fusion of the aponeuroses of the muscles of the anterior abdominal wall.
What structures form the linea alba?
It’s because the linea alba is formed by the interlacing aponeuroses of three vertical abdominal muscles: external oblique, internal oblique and transversus abdominis muscles.
What is the line of Douglas?
The arcuate line of rectus sheath, the linea semicircularis, the arcuate line, or the semicircular line of Douglas, is a horizontal line that demarcates the lower limit of the posterior layer of the rectus sheath. It is commonly known simply as the arcuate line.
What is linea albicans?
Medical Definition of lineae albicantes : whitish marks in the skin especially of the abdomen and breasts that often follow pregnancy.
What is Linea Albicantes?
li´neae albican´tes white or colorless lines on the abdomen, breasts, or thighs caused by mechanical stretching of the skin, with weakening of the elastic tissue; see also atrophic striae.
What is linea alba?
Linea Alba is a condition in which the inner tissue of your cheek, also known as buccal mucosa hardens. This results in the formation of a white ridge in the pink tissue of your cheek. This hardening is due to the deposition of a material called keratin.
What is the line Alba?
The linea alba (Latin for white line) is a single midline fibrous line in the anterior abdominal wall formed by the median fusion of the layers of the rectus sheath medial to the bilateral rectus abdominis muscles. It attaches to the xiphoid process of the sternum and the pubic symphysis.
What is the semilunar line?
The semilunar line, linea semilunaris or Spigelian line is a bilateral vertical curved line in the anterior abdominal wall where the layers of the rectus sheath fuse lateral to the rectus abdominis muscle and medial to the oblique muscles. It is the site of a Spigelian hernia. common bile duct
What is a hernia through the linea semilunaris?
A hernia through the linea semilunaris is called a Spigelian hernia, which is also referred to as a spontaneous lateral ventral hernia. Anatomy photo:35:06-0102 at the SUNY Downstate Medical Center – “The Linea Alba and Linea Semilunaris”.
What is the difference between Obliquus externus abdominis and Linea semilunares?
The Obliquus externus abdominis. (Linea semilunaris labeled vertically at center, at border between brown and gray.) Linea semilunares are at lateral borders of rectus abdominis. The linea semilunaris (also semilunar line or Spigelian line) is a curved tendinous intersection found on either side…
What is a Spigelian hernia?
spigelian hernia – abdominal hernia through the semilunar line. Synonym(s): lateral ventral hernia. Spigelius line – the slight groove in the external abdominal wall parallel to the lateral edge of the rectus sheath. Synonym(s): linea semilunaris.
