Dominic Stone
The pectineus muscle is a flat, quadrangular muscle located in the superomedial part of the anterior thigh. It is responsible for adduction and flexion of the thigh and assists in hip flexion. The muscle arises from the pectineal line of the pubis and inserts into the posterior surface of the femur, along the pectineal line and proximal part of the linea aspera. The pectineus muscle is part of the adductor group of muscles, which also includes the gracilis, adductor magnus, adductor brevis, and adductor longus muscles. These muscles originate on the ventral side of the pelvis and insert into the medial side of the limb, specifically the femur.
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What You'll Learn
- The pectineus muscle is a flat muscle in the superomedial part of the anterior thigh
- It is part of the adductor group of muscles, which originate on the ventral side of the pelvis
- The muscle attaches between the pubis and proximal femur
- Its insertion is into the medial side of the femur, along the pectineal line
- The pectineus assists in hip adduction and flexion
The pectineus muscle is a flat muscle in the superomedial part of the anterior thigh
The pectineus muscle is a flat, quadrangular muscle found in the superomedial part of the anterior thigh. It is one of the five adductor muscles, along with gracilis, adductor longus, adductor brevis, and adductor magnus. The muscle's primary action is hip flexion, but it also produces adduction and external rotation of the hip.
The pectineus muscle arises from the pectineal line of the pubis and, to a lesser extent, from the surface of the bone in front of it, between the iliopectineal eminence and pubic tubercle. The fibres pass downward, backward, and lateral, inserting into the pectineal line of the femur. This muscle is considered a composite muscle as it is innervated by the femoral nerve (L2 and L3) and, in some cases, by a branch of the obturator nerve called the accessory obturator nerve.
The pectineus muscle is part of the medial compartment of the thigh when emphasising its function and the anterior compartment of the thigh when emphasising the nerve. It lies in the same plane as the adductor longus muscle, and together, they form the medial part of the floor of the femoral triangle. The anterior branch of the obturator nerve is located posterior to the pectineus muscle, along with the adductor magnus, adductor brevis, and obturator externus muscles.
The pectineus muscle is responsible for adduction and flexion of the thigh, and it assists in the medial rotation of the thigh. This muscle is classified as a short muscle that attaches between the pubis and proximal femur. Its function in hip adduction and flexion is shared by the adductor longus, adductor brevis, adductor magnus, and gracilis muscles.
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It is part of the adductor group of muscles, which originate on the ventral side of the pelvis
The pectineus muscle is a flat, quadrangular muscle located in the superomedial part of the anterior thigh. It is one of the adductor muscles, which assist in hip adduction and flexion. The adductor group of muscles, which includes the pectineus, originates on the ventral side of the pelvis, near the symphysis. The pectineus muscle specifically arises from the pectineal line of the pubis and the surface of the bone in front of it, between the iliopectineal eminence and pubic tubercle.
The pectineus muscle is responsible for adduction and flexion of the thigh, as well as some rotation of the thigh medially. It is the most anterior adductor of the hip, and its primary action is hip flexion. The muscle fibres pass downward, backward, and lateral, inserting into the pectineal line of the femur. The insertion point is along the pectineal line and the proximal part of the linea aspera, which are continuous with each other.
The pectineus muscle is considered a composite muscle due to its innervation by two nerves. In most cases, it is innervated by the femoral nerve (L2 and L3). However, in some individuals, the pectineus may also receive innervation from the accessory obturator nerve, a branch of the obturator nerve. This dual innervation contributes to the classification of the pectineus muscle into both the anterior and medial compartments of the thigh.
The pectineus muscle forms the medial part of the floor of the femoral triangle, along with the adductor longus. Laterally, it is related to the psoas major muscle and the medial circumflex femoral artery and vein. Posterior to the pectineus are the adductor magnus, adductor brevis, and obturator externus muscles, which, along with the pectineus, are part of the adductor muscle group.
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The muscle attaches between the pubis and proximal femur
The pectineus muscle is a flat, quadrangular muscle located in the superomedial part of the anterior thigh. It is the most anterior adductor of the hip. The muscle attaches between the pubis and proximal femur.
The pectineus muscle arises from the pectineal line of the pubis and, to a lesser extent, from the surface of the bone in front of it, between the iliopectineal eminence and pubic tubercle. The fibres pass downward, backward, and lateral, inserting into the pectineal line of the femur. This line continues inferiorly from the intertrochanteric line and ends by fusing with the spiral line of the femur, forming the medial lip of the linea aspera.
The pectineus muscle is responsible for adduction and flexion of the thigh, as well as assisting in the rotation of the thigh medially. It is one of the muscles located on the medial thigh, along with other primary muscles such as the adductor longus, adductor brevis, adductor magnus, and gracilis muscles.
The anterior surface of the pectineus forms the medial part of the floor of the femoral triangle, along with the adductor longus. This surface is covered by the deep layer of fascia lata, which separates it from the femoral artery, femoral vein, and great saphenous vein that course through the femoral triangle.
The pectineus muscle is considered a composite muscle, receiving dual innervation from the femoral nerve (L2 and L3) and, in some cases, a branch of the obturator nerve called the accessory obturator nerve.
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Its insertion is into the medial side of the femur, along the pectineal line
The pectineus muscle is a flat, quadrangular muscle, situated at the anterior (front) part of the upper and medial (inner) aspect of the thigh. It is one of the muscles located on the medial thigh. The muscle's primary action is hip flexion; it also produces adduction and external rotation of the hip.
The pectineus muscle arises from the pectineal line of the pubis and, to a slight extent, from the surface of the bone in front of it, between the iliopectineal eminence and pubic tubercle. The insertion of the pectineus muscle is into the medial side of the femur, along the pectineal line. This line continues inferiorly from the intertrochanteric line and ends by fusing with the spiral line of the femur, forming the medial lip of the linea aspera.
The pectineus muscle is considered a composite muscle due to its innervation by the femoral nerve (L2 and L3) and, in some cases, a branch of the obturator nerve called the accessory obturator nerve. The femoral nerve is the primary nerve supplying the pectineus muscle in over 90% of individuals. The muscle is also associated with the medial circumflex femoral artery and vein.
The anterior surface of the pectineus forms the medial part of the floor of the femoral triangle, along with the adductor longus muscle. This surface is covered by a deep layer of fascia lata, which separates it from the femoral artery, femoral vein, and great saphenous vein passing through the femoral triangle. The pectineus muscle is positioned medially to the adductor longus and laterally to the psoas major muscle.
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The pectineus assists in hip adduction and flexion
The pectineus is a flat, quadrangular muscle, situated at the anterior (front) part of the upper and medial (inner) aspect of the thigh. It is the most anterior adductor of the hip. The muscle's primary action is hip flexion, but it also assists in hip adduction and external rotation of the hip.
The pectineus muscle arises from the pectineal line of the pubis and, to a slight extent, from the surface of the bone in front of it, between the iliopectineal eminence and pubic tubercle. The fibres pass downward, backward, and lateral, to be inserted into the pectineal line of the femur.
The pectineus is considered a composite muscle as it is innervated by the femoral nerve (L2 and L3) and, in 20% of the population, by a branch of the obturator nerve called the accessory obturator nerve. The femoral nerve is the greater nerve and is always present, providing the sole innervation for the pectineus muscle in over 90% of cases.
The pectineus is one of five adductor muscles, along with the gracilis, adductor longus, adductor brevis, and adductor magnus. These muscles primarily function in hip adduction. The adductors pull the thigh inward (adduction) and help control internal and external rotation.
The pectineus muscle assists in hip adduction and flexion, and it also helps in the medial rotation of the thigh. Due to the course of its fibres, the pectineus flexes and adducts the thigh at the hip joint when it contracts. When the lower limb is in the anatomical position, contraction of the muscle first causes flexion to occur at the hip joint.
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Frequently asked questions
The pectineus muscle inserts into the medial side of the femur, along the pectineal line and proximal part of the linea aspera.
The pectineus muscle is a flat, quadrangular muscle, situated at the anterior (front) part of the upper and medial (inner) aspect of the thigh.
The pectineus muscle originates from the pecten pubis and pectineal surface of the pubis.
The pectineus muscle assists in hip adduction and flexion, and is one of the muscles located on the medial thigh.
