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The sartorius muscle is the longest muscle in the human body. It is a thin, long, superficial muscle that runs down the length of the thigh and crosses the hip and knee joints. The muscle is innervated by the femoral nerve and may be absent in some people. The name 'sartorius' comes from the Latin word 'sartor', meaning tailor, and it is sometimes called the 'tailor's muscle'. This is likely because the muscle is used when sitting cross-legged, a position once adopted by tailors.
| Characteristics | Values |
|---|---|
| Muscle length | The longest muscle in the human body |
| Muscle shape | Long, thin, and superficial |
| Muscle origin | Anterior superior iliac spine |
| Muscle insertion | Proximal medial surface of the tibia |
| Muscle innervation | Femoral nerve (L2, L3, and L4 nerve roots) |
| Muscle function | Flexion, abduction, and external rotation of the thigh; flexion and internal rotation of the leg |
| Blood supply | Superficial circumflex iliac, lateral circumflex femoral, superficial femoral, descending genicular, and superior medial genicular arteries |
| Etymology | Derived from the Latin word "sartor" meaning "patcher" or "tailor," referring to the cross-legged position associated with tailors |
| Synergistic movements | Works with other muscles of the hip, thigh, and knee |
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What You'll Learn
The sartorius is the longest muscle in the human body
The sartorius muscle is involved in the flexion of the hip and knee joints, as well as the abduction and external rotation of the thigh, and the internal rotation of the leg. This combination of movements allows an individual to sit in a cross-legged position, a posture often associated with tailors, which is how the muscle got its name. The word "sartorius" is derived from the Latin word "sartor," which means "patcher" or "tailor."
The sartorius muscle is innervated by the femoral nerve, which receives its nerve supply from L2, L3, and L4 nerve roots. The muscle receives its vascular supply from several sources, including the femoral, deep femoral, lateral circumflex femoral arteries, and the artery of quadriceps. The length of the sartorius muscle often exceeds 50 cm, and it is estimated that only 30-50% of muscle fibres run from tendon to tendon.
The sartorius muscle plays an important role in stabilising the pelvis, especially in women, due to the constrictive effect of the muscles on both sides of the body on the pubic symphysis. It is also suggested that the sartorius may play a significant role in climbing.
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It is a superficial muscle, running down the length of the thigh
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. The word sartorius is derived from the Latin word 'sartor', which translates to 'patcher' or 'tailor'. This name likely refers to the cross-legged position in which tailors once sat. The muscle is thin and flat, extending inferomedially across the anterior surface of the thigh. It is the most superficial muscle in the anterior compartment of the thigh, with only fascia and skin over its surface.
The sartorius muscle originates from the anterior superior iliac spine, and part of the notch between the anterior superior iliac spine and anterior inferior iliac spine. It runs obliquely across the upper and anterior part of the thigh in an inferomedial direction. It passes behind the medial condyle of the femur to end in a tendon. This tendon curves anteriorly to join the tendons of the gracilis and semitendinosus muscles in the
The sartorius muscle crosses both the hip and knee joints, producing movements in both. At the hip joint, it is capable of flexion, external rotation, and abduction of the leg. At the knee, it can flex the leg; when the knee is flexed, the sartorius medially rotates the leg. The combination of all these movements allows an individual to sit in a cross-legged position. However, the movements created by the contraction of the sartorius are not limited to this single function. It is also suggested that the sartorius may play an important role in climbing.
The sartorius muscle is innervated by the femoral nerve, which receives its nerve supply from L2, L3, and L4 nerve roots. The femoral nerve innervates both the hip flexor and quadriceps muscle groups. The sartorius muscle requires extensive vascular supply from several sources, including the femoral, deep femoral, lateral circumflex femoral arteries, and the artery of quadriceps.
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It is innervated by the femoral nerve
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. The sartorius muscle originates from the anterior superior iliac spine, and part of the notch between the anterior superior iliac spine and anterior inferior iliac spine. It runs obliquely across the upper and anterior part of the thigh in an inferomedial direction.
The sartorius muscle is innervated by the femoral nerve, which receives its nerve supply from L2, L3, and L4 nerve roots. The femoral nerve innervates both the hip flexor and quadriceps muscle groups. The femoral nerve (motor divisions and branches) innervates the following muscles: ... Typically, the sartorius receives its innervation via the femoral nerve, although through cadaveric studies, it is now known that the obturator nerve also provides additional innervation. The femoral nerve also supplies sensation to the anterior thigh and medial leg.
The sartorius muscle is a thin, long, superficial muscle in the anterior compartment of the thigh. It runs over two joints—the hip and knee joints—and is the longest muscle in the body. An exceptional length of this muscle often exceeds 50cm. In such long muscles, not all muscle fibres run through the whole length of the muscle belly. It is estimated that at most 30–50% of fibres run from tendon to tendon. The rest of them end intrafascicularly.
The sartorius muscle can move the hip joint and the knee joint, but all of its actions are weak, making it a synergist muscle. At the hip, it can flex, weakly abduct, and laterally rotate the femur. At the knee, it can flex the leg; when the knee is flexed, the sartorius medially rotates the leg. Sitting cross-legged demonstrates all four actions of the sartorius.
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The muscle may be absent in some people
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. The muscle can move the hip joint and the knee joint, and all of its actions are weak, making it a synergist muscle. At the hip, it can flex, weakly abduct, and rotate the thigh laterally. At the knee, it can flex the leg; when the knee is flexed, it also rotates the leg medially. Sitting cross-legged demonstrates all four actions of the sartorius.
The name "sartorius" comes from the Latin word "sartor," meaning "patcher" or "tailor," referring to the cross-legged position in which tailors once sat. In French, an older name for this muscle is "couturier" (seamstress or dressmaker), with a similar reference to "sitting as a tailor." Antique sewing machines required continuous cross-body pedaling, which gave tailors particularly developed sartorius muscles.
The sartorius muscle plays an important part in pelvis stabilization, especially in women, due to the constrictive effect of the muscles on both sides of the body on the pubic symphysis. Most people with sartorius muscle pain feel a burning sensation down the front of their hip or tenderness on the inside of their knee. Mild sartorius muscle pain may get better on its own, but severe or persistent pain may require medical treatment. Applying an ice pack to the affected area a few times a day may help relieve pain.
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It is also known as the 'tailor's muscle'
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. The sartorius muscle is also known as the "tailor's muscle" or the "tailor's muscle". The name is derived from the Latin word "sartor", which translates to "patcher" or "tailor". The name likely refers to the cross-legged position in which tailors once sat, a position made possible by the sartorius muscle. This muscle allows for the heel of one foot to be placed across the knee of the other leg.
The muscle originates from the anterior superior iliac spine and runs obliquely across the upper and anterior part of the thigh in an inferomedial direction. It passes behind the medial condyle of the femur to end in a tendon, which joins with the gracilis and semitendinosus muscles in the pes anserinus. This insertion point is on the superomedial surface of the tibia. The sartorius muscle acts on two joints, flexing the hip and knee, and rotating the leg outward. It is capable of flexion, external rotation, and abduction of the leg. At the knee, it can flex the leg and medially rotate it.
There are other hypotheses for the origin of the name "tailor's muscle". One is that it refers to the location of the inferior portion of the muscle, the "inseam" or area of the inner thigh that tailors commonly measure when fitting trousers. Another is that the muscle closely resembles a tailor's ribbon. Antique sewing machines required continuous cross-body pedaling, which would have resulted in particularly developed sartorius muscles.
The sartorius muscle plays an important role in stabilising the pelvis, especially in women. It is also suggested that the muscle may play a role in climbing.
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Frequently asked questions
The sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment.
The sartorius muscle crosses both the hip and knee joints, producing movements in both. It is a flexor of the hip and knee and helps to balance the hip bone on the femur.
The name 'sartorius' comes from the Latin word 'sartor', meaning 'patcher' or 'tailor'. This is likely due to the cross-legged position in which tailors once sat, or the fact that the muscle closely resembles a tailor's ribbon.
The sartorius muscle acts synergistically with the other musculature of the hip, thigh, and knee. It helps with outward rotation of the hip, inward rotation of the knees, and bending of the knees.
Mild sartorius muscle pain may get better on its own, but severe pain may require medical treatment. Rest and gentle exercise are often recommended, and in some cases, physical therapy may be necessary. Stretches that target the sartorius muscle can also help.
