Zona orbicularis

Zona orbicularis is a part of the human anatomy specifically located in the hip joint. It is a circular band of fibers, a part of the capsule of the hip joint, that encircles the neck of the femur.

Etymology

The term "zona orbicularis" is derived from Latin, where "zona" means "belt" and "orbicularis" refers to "circular". Thus, the term can be translated as "circular belt".

Anatomy

The zona orbicularis is a part of the capsule of the hip joint. It is a circular band of fibers that encircles the neck of the femur. It is located just below the teres major and teres minor muscles. The zona orbicularis acts as a collar or sling around the neck of the femur, helping to hold the hip joint in place.

Function

The primary function of the zona orbicularis is to stabilize the hip joint. It does this by encircling the neck of the femur and holding it in place within the hip joint. This helps to prevent dislocation of the hip joint and allows for smooth, controlled movement of the hip.

Clinical Significance

Injuries or damage to the zona orbicularis can lead to instability in the hip joint, which can result in pain and limited mobility. Conditions such as hip dysplasia or hip dislocation may be associated with damage to the zona orbicularis.

See Also

• Hip joint
• Femur
• Hip dysplasia
• Hip dislocation

References

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• Zona orbicularis illustration from Gray's Anatomy, plate 343
  Zona orbicularis illustration from Gray's Anatomy, plate 343
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  Anatomical illustration from Gray's Anatomy, plate 342