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The margins of the inferior lumbar (Petit's) triangle are composed of the iliac crest inferiorly and the margins of two muscles – latissimus dorsi (posteriorly) and external abdominal oblique (anteriorly). The floor of the inferior lumbar triangle is the internal abdominal oblique muscle.
Petit's hernia is a hernia that protrudes through the lumbar triangle (aka Petit's triangle). [1] This triangle lies in the posterolateral abdominal wall and is bounded anteriorly by the free margin of external oblique muscle, posteriorly by the latissimus dorsi and inferiorly by the iliac crest.
The superior and inferior lumbar triangles with a cross section at the level of the superior lumbar triangle. Grynfeltt–Lesshaft hernia is a herniation of abdominal contents through the back, specifically through the superior lumbar triangle, which is defined by the quadratus lumborum muscle, twelfth rib, and internal oblique muscle.
Lumbar hernia: a hernia in the lumbar region (not to be confused with a lumbar disc hernia), contains the following entities: Petit's hernia: a hernia through Petit's triangle (inferior lumbar triangle). It is named after French surgeon Jean Louis Petit (1674–1750).
Aure-Rozanova's sign: Increased pain on palpation with a finger in the right inferior lumbar triangle (can be a positive Blumberg's sign). [41] Bartomier-Michelson's sign: Increased pain on palpation at the right iliac region as the person being examined lies on their left side compared to when they lie on their back. [41]
The alae also form the base of the lumbosacral triangle. The iliolumbar ligament and lumbosacral ligaments are attached to the ala. In the middle of the base is a large oval articular surface, the upper surface of the body of the first sacral vertebra, which is connected with the under surface of the body of the last lumbar vertebra by an ...
The triangle of auscultation is useful for assessment using a pulmonary auscultation and thoracic procedures. [1] Due to the relative thinning of the musculature of the back in the triangle, the posterior thoracic wall is closer to the skin surface, making respiratory sounds audible more clearly with a stethoscope .
They are bounded superiorly by the inguinal ligament in the femoral triangle, laterally by the border of the sartorius muscle, and medially by the adductor longus muscle. There are approximately 10 superficial lymph nodes. They normally measure up to 2 cm in diameter. [1] They are divided into three groups: