| Pectineus | |
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| The pectineus and nearby muscles | |
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| Structures passing behind the inguinal ligament. (Pectineus visible at bottom right.) | |
| Latin | musculus pectineus |
| Gray's | subject #128 472 |
| Origin | pubis - superior pubic ramus |
| Insertion | Lesser trochanter, linea aspera |
| Artery | Obturator artery |
| Nerve | Femoral nerve, sometimes obturator nerve |
| Actions | Thigh - flexion, adduction, medial rotation |
The pectineus muscle is a flat, quadrangular muscle, situated at the anterior part of the upper and medial aspect of the thigh.
It can be classified in the medial compartment of thigh[1] (when the function is emphasized) or the anterior compartment of thigh (when the nerve is emphasized).[2]
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Action
It is one of the muscles primarily responsible for hip flexion. It also adducts and medially rotates the thigh.
The pectineus muscle is the anterior most adductor of the hip.
Innervation
Innervation is by the femoral nerve (L2 and L3) and occasionally (20% of the population) a branch of the obturator nerve called the accessory obturator nerve.
Origin and insertion
It arises from the pectineal line of the pubis and to a slight extent from the surface of bone in front of it, between the iliopectineal eminence and tubercle of the pubis, and from the fascia covering the anterior surface of the muscle; the fibers pass downward, backward, and lateralward, to be inserted into the pectineal line of the femur which leads from the lesser trochanter to the linea aspera.
Additional images
 Right hip bone. External surface. |
 Structures surrounding right hip-joint. |
 Muscles of the iliac and anterior femoral regions. |
 Deep muscles of the medial femoral region. |
 The left femoral triangle. |
 The lumbar plexus and its branches. |
References
- ^ Ellis, Harold; Susan Standring; Gray, Henry David (2005). Gray's anatomy: the anatomical basis of clinical practice. St. Louis, Mo: Elsevier Churchill Livingstone. p. 518. ISBN 0-443-07168-3.
- ^ medialthigh at The Anatomy Lesson by Wesley Norman (Georgetown University)
External links
- -1301610416 at GPnotebook
- LUC pect
- SUNY Figs 12:02-05 - "Muscles of the anterior (extensor) compartment of the thigh."
- SUNY Figs 12:03-04 - "Deep muscles of the anterior thigh."
- Cross section at UV pelvis/pelvis-e12-15
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated.
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