Dominic Stone
The gracilis muscle is a long, thin muscle found in the medial compartment of the thigh. It is the most superficial of the adductor muscles and is the only hip adductor that crosses and acts on two joints: the hip and the knee. The gracilis muscle is prone to strain injuries, which can result in adductor tendinopathy, commonly seen in athletes who play high-impact sports such as soccer, hockey, and basketball. The muscle is also used in reconstructive surgery, either as a pedicled flap or as a free microsurgical flap.
| Characteristics | Values |
|---|---|
| Muscle Type | Spiral unipennate muscle |
| Muscle Group | Adductor muscle group |
| Muscle Fibre Compartments | 5 to 7 |
| Muscle Length | 25 cm |
| Muscle Width | 4 to 6 cm |
| Muscle Origin | Pubic symphysis, inferior pubic ramus, ischium |
| Muscle Insertion | Medial condyle of the knee, medial tibia |
| Muscle Innervation | Obturator nerve, anterior branch |
| Muscle Vascular Supply | Artery to the adductors, medial circumflex femoral artery |
| Muscle Function | Hip adduction, knee flexion, knee internal rotation |
| Muscle Use | Microsurgery, reconstruction of upper and lower limbs, breast reconstruction, facial paralysis |
| Muscle Injuries | Groin strain, muscle spasm, pinched nerves, adductor tendinopathy |
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What You'll Learn
Gracilis muscle location
The gracilis muscle is a long, thin, spiral muscle located in the medial (adductor) compartment of the thigh. It is the most superficial muscle of the medial thigh, and it is also the weakest. The gracilis muscle is one of seven muscles classified as hip adductors. It is the only hip adductor that crosses and acts on two joints: the hip and the knee.
The gracilis muscle is found in the distal third of the thigh, where it gives rise to a rounded tendon that travels inferiorly and eventually blends into a round tendon. This tendon passes medial to the knee joint, between the tendons of the sartorius and semitendinosus muscles, and then to its insertion site. At their insertion sites, the tendons of the gracilis, sartorius, and semitendinosus muscles collectively form the pes anserinus, which is Latin for "goose's foot." The pes anserinus attaches to the medial surface of the proximal tibia, inferior to the condyle.
The gracilis muscle originates from three sites located on the ischium and pubis: the medial margins of the lower half of the anterior body of the pubis, the inferior pubic ramus, and the ischiopubic ramus. It then inserts onto the medial tibia below the condyle via the pes anserinus. The muscle fibres travel inferiorly and eventually blend into a round tendon, which courses posterior to the sartorius tendon and passes the medial condyle of the femur.
The gracilis muscle is innervated by the obturator nerve, specifically the anterior branch of the obturator nerve, which can measure up to 12 cm in length. It is also supplied by the profunda femoris artery, a branch of the deep femoral artery. The gracilis muscle receives its vascular supply from a 4 to 6 cm long branch of this artery, located 8 to 12 cm from the muscle's origin.
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Gracilis muscle function
The gracilis muscle is a long, thin, strap-like muscle located in the medial compartment of the thigh. It is the most superficial of the medial thigh muscles and is the weakest member of the adductor muscle group. The gracilis muscle is involved in multiple actions, including adduction, rotation, and flexion of the hip and knee joints.
One of the main functions of the gracilis muscle is adduction, or pulling the thighs together. This action helps to balance the trunk during walking and running. The gracilis muscle also assists in rotating the hips and thighs inward and outward. Additionally, it plays a role in bending the knee, working together with the hamstrings, sartorius, gastrocnemius, plantaris, and popliteus muscles as a group known as knee flexors.
The gracilis muscle originates from the pubic symphysis, the inferior pubic ramus, and the ischium. It then inserts distally into the medial condyle of the knee, connecting with the upper part of the shin bone (tibia). The muscle fibres travel inferiorly and eventually blend into a round tendon, which passes medial to the knee joint and joins the pes anserinus.
The pes anserinus is a conjoined tendon formed by the gracilis, sartorius, and semitendinosus muscles. It attaches to the medial surface of the proximal tibia, with the gracilis tendon joining more proximally than the other two tendons. The gracilis muscle is innervated by the obturator nerve, specifically the anterior branch, and receives its vascular supply from the "artery to the adductors," a branch of the deep femoral artery.
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Gracilis muscle anatomy
The gracilis muscle is a long, thin, strap-like muscle in the medial thigh compartment. It is the most superficial muscle of the medial (adductor) compartment of the thigh. It is also the weakest member but the only hip adductor that crosses and acts on two joints: the hip and the knee. The gracilis muscle is involved in multiple actions, including thigh adduction and flexion, leg flexion, and medial (internal) rotation. These actions play a crucial role in maintaining balance while walking.
The gracilis muscle originates from three sites on the ischiopubic ramus: the medial margins of the lower half of the anterior body of the pubis, the pubic symphysis, and the inferior pubic ramus. It then travels down the leg, passing between the tendons of the sartorius and semitendinosus muscles, and inserts onto the medial tibia below the medial condyle of the knee. At the insertion site, the gracilis tendon joins the pes anserinus, which is Latin for "goose's foot." The pes anserinus is a conjoined tendon formed by the tendons of the gracilis, sartorius, and semitendinosus muscles.
The gracilis muscle is innervated by the obturator nerve, specifically the anterior branch of the obturator nerve (L2-L4). The obturator nerve enters the muscle obliquely, at a distance of approximately 6 to 12 cm from its origin. The gracilis muscle receives its vascular supply primarily from the "artery to the adductors," a branch of the deep femoral artery. Additionally, the proximal portion of the muscle receives a minor blood supply from the medial circumflex femoral artery.
The gracilis muscle is prone to various injuries, particularly in athletes participating in high-impact sports such as soccer, hockey, football, and basketball. Common injuries include groin strains, muscle spasms, and pinched nerves, which can cause pain and muscle weakness. Treatment options for gracilis muscle injuries may include rest, rehabilitation, pain medications, physical therapy, and gentle exercises or stretches.
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Gracilis muscle injuries
The gracilis muscle is a long, slender muscle located in the medial (adductor) compartment of the thigh. It is a hip adductor, assisting with hip adduction, knee flexion, and knee internal rotation. It is also the only hip adductor that crosses and acts on two joints: the hip and the knee. The gracilis muscle is prone to strain injuries, particularly in athletes who participate in high-impact sports with ballistic movements, such as soccer, hockey, baseball, football, and basketball.
Another common injury associated with the gracilis muscle is pes anserine bursitis, an inflammatory condition affecting the bursa underlying the conjoined insertion of the sartorius, gracilis, and semitendinosus tendons on the proximal anteromedial tibia. Patients with pes anserine bursitis typically experience pain around the Pes Anserine area when climbing stairs or standing up from a sitting position. This condition is commonly seen in individuals who are overweight, have osteoarthritis, or are female.
In more severe cases of gracilis muscle injuries, such as a complete rupture, prolonged rest and rehabilitation may be required for healing. Physical therapy, including therapeutic ultrasound, electrical stimulation, and kinesiology taping, can help speed up recovery and improve strength, range of motion, and functional mobility. Severe pain and swelling may be managed with over-the-counter non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen.
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Gracilis muscle treatment
The gracilis muscle is a long, slender muscle located in the medial (adductor) compartment of the thigh. It is the most superficial hip adductor, overlying the adductor longus, adductor brevis, adductor magnus, and pectineus muscles. The gracilis muscle assists with hip adduction, knee flexion, and knee internal rotation. It is prone to strain injuries, especially in athletes who participate in high-impact sports such as soccer, hockey, and basketball.
- Physical Therapy: This includes stretching exercises to release trigger points and improve range of motion, as well as strengthening exercises to improve stability and reduce the risk of future injuries.
- Rest: Temporarily stopping activities that place pressure on the gracilis muscle can give it time to heal.
- Ice and Compression: These are often used in conjunction with rest to reduce inflammation and pain.
- Medications: Drugs can be used to target the source of inflammation and provide relief from acute symptoms.
- Injections: In some cases, injections may be recommended to address the underlying cause of the pain and provide targeted relief.
- Surgery: In more severe cases, surgery may be required to repair or reconstruct the gracilis muscle. The gracilis tendon is often used in reconstruction surgery, particularly in ACL reconstruction.
It is important to consult with a qualified healthcare professional, such as a physiotherapist or orthopedic specialist, to determine the most appropriate treatment plan for your specific condition. They will be able to advise on the best course of action based on your individual symptoms and needs.
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Frequently asked questions
The gracilis muscle is a long, thin muscle in each of your inner thighs that extends past your knee.
The gracilis muscle is located in the medial thigh compartment.
The gracilis muscle's main functions include pulling your thighs together (adduction), rotating your hips inward and outward, and bending each knee with the help of your hamstrings.
The gracilis muscle is widely used in reconstructive surgery (graciloplasty), either as a pedicled flap or as a free microsurgical flap.
The gracilis muscle is vulnerable to injuries, including groin strains, muscle spasms, and pinched nerves that can cause pain and muscle weakness.
