Obturator canal

The Obturator Canal is a significant anatomical structure in the human body, specifically located in the pelvic region. It is a passage in the anterior part of the human pelvis through which the obturator vessels and obturator nerve pass.

Etymology

The term "obturator" is derived from the Latin word "obturare", which means to close or obstruct. This is in reference to the function of the obturator muscles, which serve to close the obturator foramen.

Anatomy

The obturator canal is a narrow passage that is approximately 2-3 cm long. It is formed by the obturator membrane, a thin sheet of connective tissue that covers the obturator foramen. The canal begins at the pelvic brim and ends at the obturator foramen, allowing the obturator nerve and vessels to pass from the pelvis to the thigh.

Function

The primary function of the obturator canal is to provide a pathway for the obturator nerve and vessels. The obturator nerve is responsible for the sensory innervation of the skin of the medial aspect of the thigh, as well as the motor innervation of the adductor muscles of the lower limb. The obturator vessels, which include the obturator artery and vein, supply blood to the medial aspect of the thigh.

Clinical Significance

The obturator canal is of clinical significance as it can be a site of an obturator hernia. An obturator hernia is a rare type of hernia that occurs when abdominal contents protrude through the obturator canal. This type of hernia is more common in women, particularly those who are thin, multiparous, and elderly. It can cause symptoms such as bowel obstruction and pain in the groin area.

Related Terms

• Obturator Foramen
• Obturator Nerve
• Obturator Vessels
• Obturator Hernia

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