Dominic Stone
The pectineus muscle is a flat, quadrangular muscle located at the front of the upper and inner thigh. It is one of five large muscles on the medial thigh, and its primary action is hip flexion. The pectineus muscle also produces adduction and external rotation of the hip. This muscle is considered a transitional muscle between the anterior thigh and medial thigh. The pectineus muscle can become injured by overstretching, and treatment often includes physiotherapy.
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What You'll Learn
The pectineus muscle is a hip adductor
The pectineus muscle is a flat, quadrangular muscle located at the anterior (front) part of the upper and medial (inner) aspect of the thigh. It is a hip adductor, one of five large muscles on the medial thigh that adduct the leg. The pectineus is the most anterior (closest to the front) of the hip adductors.
The pectineus muscle originates from the pectineal line of the pubic bone, also known as the pecten pubis. It continues downward and in a posterolateral direction (behind and to the side) and inserts into the pectineal line of the femur (thigh bone). The muscle has the most superior attachment of all the thigh adductors, and it slides over the superior margin of the superior pubic ramus.
The pectineus muscle is considered a transitional muscle between the anterior thigh and medial thigh due to its innervation by the femoral nerve and, in some cases, the obturator nerve. The femoral nerve is the greater nerve, providing the sole innervation for the pectineus muscle in over 90% of cases. The muscle is also innervated by the obturator nerve in 8.7% of cases.
The pectineus muscle assists in hip adduction and flexion, and it may also contribute to external and internal rotation of the thigh. When the pectineus muscle contracts, it flexes and adducts the thigh at the hip joint. This muscle is an important stabilizer of the pelvis, acting as an adaptable ligament of the hip joint during body movements.
The pectineus muscle can become injured through overstretching, rapid movements like kicking or sprinting, or even by sitting with legs crossed for too long. Treatment for a pectineus injury involves protecting the injured area, minimizing activities that use the muscle, and applying ice to reduce swelling and pain.
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It is a flat, quadrangular muscle
The pectineus muscle is a flat, quadrangular muscle located at the anterior (front) part of the upper and medial (inner) aspect of the thigh. It is one of the five large muscles on the medial thigh, alongside the adductor longus, adductor brevis, adductor magnus, and gracilis muscles. These muscles primarily function in hip adduction, with the pectineus being the most anterior adductor of the hip.
The pectineus muscle is considered a transitional muscle between the anterior thigh and medial thigh due to its innervation by the femoral nerve and, in some cases, the obturator nerve. The anterior part of the muscle is innervated by the femoral nerve (L2, L3), while the posterior part is supplied by a branch of the obturator nerve (L3, L4). The muscle's primary action is hip flexion, and it also contributes to adduction and external rotation of the hip.
The pectineus muscle originates from the pectineal line of the pubis and attaches proximally to the pubis (superior ramus). It then slides over the superior margin of the superior pubic ramus and courses posterolaterally down the thigh. The muscle inserts into the posterior surface of the femur, along the pectineal line and proximal part of the linea aspera. These lines are continuous with each other, with the pectineal line ending by fusing with the spiral line of the femur to form the medial lip of the linea aspera.
The pectineus muscle is susceptible to injury through overstretching, rapid movements like kicking or sprinting, or even sitting with legs crossed for too long. The most common symptom of an injured pectineus muscle is pain, which can be treated with ice and rest. Activities that use the pectineus muscle include running, skating, kicking a soccer ball, and playing basketball.
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It is located in the anterior upper thigh
The pectineus muscle is a flat, quadrangular muscle located at the anterior (front) upper and inner aspect of the thigh. It is considered a transitional muscle between the anterior thigh and the medial thigh. The muscle's fibres pass downward, backward, and lateral, inserting into the pectineal line of the femur.
The pectineus muscle is the most anterior adductor of the hip. It is one of five large muscles on the medial (middle) thigh that adduct the leg. It is also the most superior attachment of all the thigh adductors. The muscle originates from the pectineal line of the pubis and, to a lesser extent, from the surface of the bone in front of it. The muscle then slides over the superior margin of the superior pubic ramus and courses posterolaterally down the thigh.
The pectineus muscle is innervated by the femoral nerve (L2, L3) and, in some cases, by a branch of the obturator nerve called the accessory obturator nerve. The femoral nerve is always present and provides the sole innervation for the pectineus muscle in over 90% of cases. The muscle receives its main blood supply from the medial circumflex femoral artery, a branch of the femoral artery.
The pectineus muscle assists in hip adduction and flexion. It also contributes to external and internal rotation of the thigh, although this is still heavily debated. The muscle is an important stabilizer of the pelvis, acting as an adaptable ligament of the hip joint during body movements.
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The muscle is innervated by the femoral nerve
The pectineus muscle is a flat, quadrangular muscle located at the anterior (front) part of the upper and medial (inner) aspect of the thigh. It is considered a transitional muscle between the anterior thigh and medial thigh. The pectineus muscle is innervated by the femoral nerve (L2 and L3) and, in some cases, by the obturator nerve.
The femoral nerve is the greater nerve supplying the pectineus muscle. This nerve arises from the lumbar spine and supplies the anterior thigh muscles, including the pectineus. The femoral nerve is always present and provides the sole innervation for the pectineus muscle in over 90% of cases. It is responsible for transmitting electrical impulses to the muscle, causing it to contract and relax, resulting in movements such as hip flexion and adduction.
The obturator nerve, a branch of the lumbar plexus, is also involved in innervating the pectineus muscle in a small percentage of individuals. This nerve usually supplies the hip adductor muscles, which include the pectineus. However, its presence in innervating the pectineus muscle is less common, occurring in approximately 8.7% of cases.
The pectineus muscle has a composite innervation pattern, receiving input from both the femoral nerve and, occasionally, the obturator nerve. This dual innervation reflects the muscle's compartmentalisation into the anterior and medial compartments of the thigh. The anterior part of the pectineus muscle is innervated by the femoral nerve, while the posterior part is supplied by the obturator nerve.
The pectineus muscle is an important muscle in the body, contributing to hip flexion, adduction, and external rotation. It is the most anterior adductor of the hip and plays a role in stabilising the pelvis. The muscle's innervation by the femoral nerve and, occasionally, the obturator nerve, allows for these essential functions and helps to maintain the integrity of the hip joint during body movements.
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Pectineus injuries and treatment
The pectineus muscle is a short, flat, quadrangular muscle in the groin and upper thigh. It is a hip adductor and assists in hip adduction and flexion. The pectineus muscle can become injured by overstretching, rapid movements like kicking or sprinting, changing directions too quickly while running, or even sitting with a leg crossed for too long. The most common symptom of an injured pectineus muscle is pain, which can vary from a dull ache that gradually worsens to a sudden, sharp pain upon injury. Other symptoms include bruising, swelling, tenderness, and stiffness.
Treatment for pectineus injuries typically involves rest, ice, and physical therapy. It is important to avoid any movements or activities that may cause further injury, such as running, jumping, and walking. Icing the injured area can help reduce swelling and pain. This should be done for 10 to 20 minutes every one to two hours for the first three days or until swelling subsides. After the initial swelling has gone down, heat can be applied using a warm water bottle, heating pad, or warm cloth. It is important to avoid falling asleep with a heating pad on as it may cause burns.
Once the acute phase of the injury has passed, your healthcare provider may refer you to physical therapy. Physical therapy exercises focus on stretching, strengthening, and range of motion improvement. Therapeutic ultrasound, electronic muscle stimulation, massage, and hands-on tissue manipulation may also be used.
In severe cases (Grade 3 injury), immediate medical attention is required. This includes instances where there is severe pain or swelling in the groin area, changes in skin colour, tingling, weakness, numbness, or an inability to move or put weight on the leg.
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Frequently asked questions
The pectineus muscle is a flat, quadrangular muscle located at the anterior (front) part of the upper and inner thigh.
The pectineus muscle is the most anterior adductor of the hip and its primary action is hip flexion. It also produces adduction and external rotation of the hip.
Pectineus muscle pain is often caused by overstretching, rapid movements like kicking or sprinting, changing directions too quickly while running, or even sitting with legs crossed for too long.
Treatment for a pectineus muscle injury involves protecting the injured area, minimizing activities that use the muscle, and icing the injury to reduce swelling and pain.
