The pectineus muscle is a small, flat, rectangular muscle located in the upper inner thigh. It plays a crucial role in hip flexion, adduction (bringing the leg toward the midline), and rotation. This article provides a complete overview of the pectineus muscle anatomy, including its origin, insertion, actions, nerve supply, blood supply, common injuries, and practical rehabilitation tips.
The pectineus muscle sits in the anterior (front) compartment of the thigh. It forms part of the floor of the femoral triangle, a key anatomical region for vascular and nerve structures.
The pectineus originates from the pectineal line of the pubis, which is a bony ridge on the superior pubic ramus. It also attaches just lateral to the pubic tubercle.
The muscle inserts on the pectineal line of the femur, a ridge running vertically down the back of the upper femur shaft, just below the lesser trochanter.
This origin and insertion allow the pectineus to pull the femur toward the midline and assist in flexing the hip joint.
The pectineus muscle has a dual nerve supply, which is uncommon among thigh muscles.
This dual innervation means that injuries to either the femoral or obturator nerve may partially affect pectineus function.
The pectineus receives blood from several arteries, ensuring a robust supply for healing and function.
| Artery | Source | Notes |
|---|---|---|
| Medial circumflex femoral artery | Deep femoral artery | Main blood supply to the muscle |
| Obturator artery | Internal iliac artery | Supplies the deep portion |
| Femoral artery | External iliac artery | Provides minor branches |
The medial circumflex femoral artery is the dominant source, and it also supplies the femoral head, making it clinically significant in hip fractures.
The pectineus performs three main actions at the hip joint.
For example, when you sit and cross one leg over the other, your pectineus is actively contracting on the crossed side. During a squat, the pectineus helps stabilize the hip and pull the legs inward.
"The pectineus is often overlooked in hip rehabilitation, yet it is essential for controlled adduction and flexion during walking and running."
Pectineus injuries are less common than hamstring or quadriceps strains, but they do occur, especially in athletes and active individuals.
A strain (muscle tear) can happen during sudden twisting motions, overstretching, or explosive adduction. Symptoms include:
Overuse from repetitive kicking, cycling, or horseback riding can lead to tendinopathy. This presents as gradual onset groin pain that worsens with activity.
Rarely, the nerve branches supplying the pectineus can become compressed, causing weakness or numbness in the inner thigh.
To assess the pectineus, a clinician will typically perform the following tests:
Rehab for pectineus issues focuses on gradually restoring range of motion, strength, and neuromuscular control.
"A gradual return to sport-specific movements, such as lateral shuffles and controlled kicks, is essential before full activity is resumed."
Understanding the pectineus can help you move more efficiently and avoid injury.
The pectineus muscle is a small but functionally important adductor of the hip. Its dual nerve supply, unique position within the femoral triangle, and role in both flexion and adduction make it relevant for anyone studying or working with human movement. Recognizing pectineus strain early and applying targeted stretching and strengthening can prevent chronic groin pain and improve hip stability. Whether you are an athlete, a clinician, or simply someone seeking to understand your own body, knowing the anatomy of the pectineus muscle is a practical step toward better movement health.
The pectineus primarily flexes and adducts the hip joint. It also assists in medial rotation of the thigh.
It is located in the upper inner thigh, forming part of the floor of the femoral triangle, just below the inguinal ligament.
The pectineus is innervated mainly by the femoral nerve (L2, L3, L4), with a variable contribution from the obturator nerve.
Isometric adduction (squeezing a ball between knees), side-lying adduction, and standing cable adduction are effective strengthening exercises.
The butterfly stretch and standing adductor stretch are two common and effective stretches for the pectineus.
Symptoms include sharp groin pain during hip flexion or adduction, tenderness over the muscle, and possible bruising or swelling.
Yes, pectineus strains or tendinopathy are common causes of groin pain, especially in athletes who perform kicking or twisting movements.
Yes, the pectineus is considered the most anterior muscle of the adductor group, even though it also flexes the hip.
Mild strains often heal within two to four weeks with rest and rehabilitation. Severe tears may take six to eight weeks or longer.
The pectineus receives blood mainly from the medial circumflex femoral artery, with contributions from the obturator artery and femoral artery.
