Logan Steele
Hip adductors refer to a group of muscles in the medial compartment of the thigh that are responsible for bringing the thighs together and creating adduction torque, moving the lower extremity toward the midline of the body. The primary hip adductors are the pectineus, adductor longus, gracilis, adductor brevis, and adductor magnus. The adductor longus is the most frequently injured muscle in athletes, causing groin pain. The hip adductors also contribute to secondary functions such as hip flexion and rotation, with the obturator externus, gemelli, and quadratus femoris sometimes included in this muscle group.
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What You'll Learn
Hip adductor muscles and their functions
The hip adductors are a group of muscles in the medial compartment of the thigh that are responsible for moving the thigh closer to the body's central axis or midline. They also have secondary functions, including hip flexion and rotation. The hip adductors originate from the pubis and ischium bones and insert onto the femur, crossing over the hip joint.
There are four primary hip adductor muscles: adductor longus, adductor brevis, adductor magnus, and gracilis. The adductor longus is a large, flat muscle that partially covers the adductor brevis and magnus. It is the most frequently injured muscle in athletes, causing groin pain. The adductor brevis is a short muscle that lies underneath the adductor longus. The adductor magnus is the largest muscle in the medial compartment and is comprised of two parts: an adductor component and a hamstring component. The gracilis is the most superficial and medial of the hip adductors, crossing both the hip and knee joints. It adducts the thigh at the hip and flexes the leg at the knee.
In addition to these four primary muscles, other muscles are sometimes included as part of the hip adductors. These include the pectineus, obturator externus, gemelli (superior and inferior), and quadratus femoris. The pectineus is the most superior hip adductor and is flat and quadrangular in shape. It is the only adductor muscle innervated by the femoral nerve. The obturator externus is a small, triangular, and flat muscle that helps adduct the thigh at the hip joint. The quadratus femoris is a flat and rectangular muscle that is the most inferior gluteal muscle of the deep layer.
The hip adductors are important for gait stabilization and balance during activities such as standing, walking, or running. They also play a role in postural control. However, they are susceptible to injuries, especially in sports that involve explosive movements or extreme stretching. A strain of the adductor muscles is commonly known as a "groin strain," and it can cause pain and affect the function of the hip adductors.
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Hip adductor injuries and treatment
The hip adductors are a group of muscles in the medial compartment of the thigh that are responsible for bringing the thighs together (adduction) and gait stabilization. The primary hip adductors are the pectineus, adductor longus, gracilis, adductor brevis, and adductor magnus. Adductor longus is the most frequently injured muscle in athletes, often causing groin pain. Adductor injuries are common in contact and cutting sports such as football, rugby, and hockey, especially if the muscles are tight, weak, or tired.
Adductor injuries can result from a disproportional strain on the muscles, often combined with inadequate warm-up and lack of stretching. Forced external rotation of an abducted leg, overuse with repetitive abduction, or forceful eccentric contractions can also cause injury. Symptoms include sudden and severe pain on the inside of the thigh, with possible bruising and tenderness in the area. In more severe cases, there may be swelling and palpable defects.
To treat adductor injuries, it is important to rest and apply ice to the affected area several times a day. Compression and elevation can also help minimize swelling. Most adductor injuries can be treated non-operatively, but if there is a tear between the tendon and bone, or if non-operative treatments are ineffective, surgery may be required to reattach the tendon. Arthroscopy, a type of keyhole surgery, can be used to diagnose and treat joint problems, while hip replacement surgery is a last resort when other treatments have failed to relieve symptoms.
To prevent adductor injuries, it is crucial to warm up properly before exercise and cool down afterward. Chronic adductor injuries can impact athletic performance and cause long-term issues. Additionally, a malposition of the sacroiliac joint can restrict the function of the hip adductors over time and should be addressed clinically.
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Hip adductor muscles and sports
The hip adductors are a group of muscles in the medial compartment of the thigh that are responsible for moving the thighs together (adduction) and gait stabilization. They also play a role in hip flexion and rotation. The primary hip adductor muscles are the pectineus, adductor longus, gracilis, adductor brevis, and adductor magnus. These muscles originate on the pubis and ischium bones and insert on the medial posterior surface of the femur.
The adductors are important for athletes as they provide support for the hips and lower body, improve balance, power, speed, and alignment. Toning, strengthening, and stretching the hip adductors can improve athletic performance and prevent injuries. For example, in sports such as soccer, doing the splits, or slipping on ice, a groin strain is a common injury that can affect the adductor muscles. Adductor longus strains are a common cause of groin pain in athletes, with veteran players in sports such as hockey, football, rugby, and skating being particularly susceptible.
To prevent injuries to the hip adductors, it is important to ensure a proper warm-up, gradually increasing the range of motion and resistance, and focusing on muscle contraction. Hip abduction exercises can help tone the glutes and prevent or treat hip and knee pain.
Some specific exercises that target the hip adductors include:
- The adductor squeeze test: This is used to diagnose groin injuries and measure adductor muscle strength.
- Hip abduction exercises: These can help tone the glutes and prevent or treat hip and knee pain.
- The adductor tenotomy: This is a surgical procedure that involves cutting the origin tendons of the adductor muscles of the thigh. It is sometimes performed on children with cerebral palsy who have hypertonia of the adductor muscles, which can obstruct normal hip development.
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Hip adductor muscle anatomy
The hip adductors are a group of muscles in the medial compartment of the thigh that are responsible for bringing the thighs together (adduction) and gait stabilization. There are four primary muscles in this group: adductor longus, adductor brevis, adductor magnus, and gracilis. The adductor longus is the most frequently injured muscle in athletes, causing groin pain. The adductor brevis is a triangular muscle and the shortest of the adductors. Its fibres originate from the lateral part of the body and inferior ramus of the pubis and insert onto the linea aspera. The adductor magnus is the largest muscle in the medial compartment and is comprised of two parts: an adductor component and a hamstring component.
The gracilis is the most superficial and medial of the hip adductors. It crosses both the hip and knee joints, adducting the thigh at the hip and flexing the leg at the knee. The obturator externus is sometimes considered part of the hip adductors as one of its actions is to adduct the thigh at the hip joint. It is a triangular and flat muscle that originates from the external (anterior) obturator membrane and the bony border of the obturator foramen. The pectineus is another muscle that assists in the movement of the hip adductors and plays a role in hip flexion. It is the most superior hip adductor and is flat and quadrangular in shape.
The hip adductors share a compartment and, therefore, also share blood supply and innervation. They receive their blood supply mainly from the obturator artery, a branch of the internal iliac artery. Most hip adductors are innervated by the obturator nerve (L2-L4), except for the pectineus, which is innervated by the femoral nerve (L2-L3). However, due to natural anatomical variation, the pectineus can also be innervated by the obturator nerve.
The main function of the adductor muscle group is to create adduction torque, bringing the lower extremity toward the midline. They also have secondary functions, including hip flexion and rotation. The adductor muscles are closely associated with diseases of the hip and may cause referred pain to the pelvis. Strain of the adductor muscles is the underlying cause of what is commonly known as a 'groin strain'.
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Hip adductor muscle innervation
The hip adductors refer to a group of muscles in the medial compartment of the thigh that are responsible for bringing the lower extremity towards the midline of the body. These muscles also have the secondary function of flexing the hip joint. The hip adductors are made up of five muscles: pectineus, adductor longus, gracilis, adductor brevis, and adductor magnus.
The pectineus is the only adductor muscle that is innervated by the femoral nerve. The other adductor muscles are innervated by the obturator nerve, with the exception of a small part of the adductor magnus, which is innervated by the tibial nerve. The obturator nerve is responsible for innervating the adductor longus, adductor brevis, and the adductor part of the adductor magnus. The obturator nerve originates from the lumbar plexus, formed by the ventral branches of the second, third, and fourth lumbar nerves.
The adductor longus is a flat, triangular muscle that lies on the same plane as the pectineus, above all other adductors. It originates from the anterior surface of the body of the pubis and inserts onto the middle third of the linea aspera. The adductor longus is the most frequently injured muscle in athletes, with strains being one of the most common causes of groin pain in athletes.
The adductor brevis is a short, triangular muscle that lies underneath the adductor longus. It originates from the anterior surfaces of the superior and inferior pubic rami and attaches to the distal lesser femoral trochanter and proximal linea aspera on the femur. The adductor brevis is the smallest of the adductors and is responsible for the adduction of the thigh and the flexion of the hip.
The gracilis is the most medial and superficial muscle of the medial thigh compartment, overlying the other hip adductors. It is the only muscle in this group that crosses two joints: the hip and the knee. The gracilis muscle is used in several types of transplant surgeries, including facial reconstruction.
The adductor magnus is the largest of the hip adductors and consists of two distinct parts: the adductor part and the ischiocondylar (hamstring) part. The adductor part is considered part of the medial thigh compartment, while the hamstring part belongs to the posterior compartment of the thigh. The adductor magnus has a dual nerve supply, with the adductor part innervated by the obturator nerve and the hamstring part innervated by the tibial component of the sciatic nerve.
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Frequently asked questions
Hip adductors are a group of muscles in the medial compartment of the thigh that are responsible for moving the thigh closer to the body's central axis.
The hip adductors consist of four primary muscles: adductor longus, adductor brevis, adductor magnus, and gracilis. The pectineus muscle assists in this movement but is not a primary hip adductor.
The adductor longus is a flat, fan-shaped muscle that provides adduction of the thigh at the hip joint. It also contributes to the flexion of the extended thigh and the extension of the flexed thigh.
The adductor muscle tear, commonly known as a "groin strain", is a frequent injury affecting the hip adductors. The adductor longus is particularly susceptible to strains, resulting in groin pain.
