What is the role of the ligamentum teres at the hip joint?
What will be an ideal response?
ANS:
The ligamentum teres (or ligament of the head of the femur) arises from the acetabular notch and the transverse acetabular ligament and enters the acetabulum to attach to the fovea capitis of the femur. It varies tremendously in strength among individuals but does not appear to contribute much to hip joint stability. It serves primarily as the pathway for a small branch of the obturator artery, which supplies a small amount of blood directly to the femoral head. Most of the blood supply to the femoral head is obtained through the circumflex arteries, which enter at the trochanters and cross the neck to the head. However, while the capital epiphyseal plate persists or prior to anastomosis between the obturator and circumflex supplies, the blood from the circumflex cannot reach the head. Therefore, the head of the femur in the skeletally immature person is very dependent upon the vessel accompanying the ligamentum teres. Disruption can result in avascular necrosis of the head.
You might also like to view...
Which type of oxygen analyzer should not be used in the presence of anesthetic gases?
a. Polarographic c. Electrical b. Paramagnetic d. Galvanic
__________ standardized requirements for medical documentation as defined by the Centers for Medicare and Medicaid Services in 1995 and 1997
Fill in the blank with correct word.
Which of the following is not a function of the tube head?
A) It allows all radiation to exit. B) It provides grounding for the electrical components. C) It protects the x-ray tube from accidental damage. D) It prevents overheating of the x-ray tube.
Which of the following is true of COBRA insurance?
A. It is available to former employees of businesses that employ 100 or more workers. B. It is available to former employees of businesses that employ 50 or more workers. C. It is available to former employees of businesses that employ 20 or more workers. D. It is available to former employees of businesses that employ 5 or more workers.