Hip pathologies
The hip is one of the largest joints in the human body. It is a synovial and ball-and-socket (or enarthrosis) joint, allowing for a wide range of motion.
This joint connects the pelvis to the femur, playing a crucial role in locomotion and body stability during various activities such as walking, running, and jumping.
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Hip pathologies treated by Dr. Villa
Total hip replacement,
prosthesis replacement
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Anatomy and function of the hip
Anatomy
Bony Structures:
– Acetabulum: A cup-shaped cavity located in the hip bone of the pelvis. It forms the concave part of the hip joint and houses the femoral head.
– Femoral Head: The spherical end of the femur (thigh bone) that articulates with the acetabulum. It forms the convex part of the joint.
– Femoral Neck: The narrow segment of the femur that connects the head to the diaphysis (shaft) of the bone.
– Articular Cartilage: Hyaline cartilage covers the articular surfaces of the acetabulum and the femoral head, allowing for smooth movement and reducing friction.
– Joint Capsule: A thick fibrous capsule envelops the joint, containing synovial fluid that lubricates the joint and nourishes the cartilage.
Ligaments:
– Iliofemoral Ligament: Located at the front of the joint, it is one of the strongest and prevents hyperextension of the hip.
– Pubofemoral Ligament: Located at the front and bottom, it limits abduction and extension.
– Ischiofemoral Ligament: Located at the back, it limits extension and internal rotation.
– Ligament of the Femoral Head (Ligamentum Teres): A small ligament inside the joint, it contributes to stability and carries a small artery that supplies the femoral head.
Muscles:
– Flexor Muscles: The primary flexor muscle is the iliopsoas muscle.
– Extensor Muscles: The gluteus maximus and hamstrings are the primary extensors.
– Abductor Muscles: The gluteus medius and gluteus minimus are the primary abductors.
– Adductor Muscles: The adductor muscles of the thigh, such as the adductor longus, brevis, and magnus, are responsible for adduction.
– Rotator Muscles: The deep lateral rotators (piriformis, gemelli, obturators) are responsible for external rotation, while the gluteus minimus and medius contribute to internal rotation.
Blood Supply:
– Arteries: The main arteries are the medial and lateral circumflex arteries, which originate from the deep femoral artery. The obturator artery and superior gluteal artery also contribute to the blood supply.
– Veins: Venous drainage occurs through the circumflex, obturator, and gluteal veins.
Innervation:
– The main nerves are the femoral nerve, the obturator nerve, and the superior and inferior gluteal nerves.
Function
The hip is essential for body stability and movement. It allows for:
- Flexion and Extension: Forward and backward movement of the thigh.
- Abduction and Adduction: Movement of the thigh away from and toward the body.
- Internal and External Rotation: Rotation of the thigh inward and outward.
- Circumduction: Circular movement of the thigh.
The hip also plays a key role in transmitting forces between the trunk and the lower limbs, which is vital for posture, balance, and locomotion.
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