Sartorius muscle
You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.
| Sartorius muscle | |
|---|---|
| Muscles of lower extremity. (Rectus femoris removed to reveal the vastus intermedius.) | |
| Latin | musculus sartorius |
| Gray's | subject #128 470 |
| Origin | superior to the anterior superior iliac spine |
| Insertion | medial side of the upper tibia in the pes anserinus |
| Artery: | femoral artery |
| Nerve: | femoral nerve |
| Action: | Flexion of knee, Flexion of leg |
| Dorlands /Elsevier | m_22/12547605 |
The sartorius muscle is a long thin muscle that runs down the length of the thigh. It is the longest muscle in the human body. Its upper portion forms the lateral border of the femoral triangle.
Origin and insertion
The sartorius muscle arises by tendinous fibres from the anterior superior iliac spine, running obliquely across the upper and anterior part of the thigh in an inferomedial direction.
It descends as far as the medial side of the knee, passing behind the medial condyle of the femur to end in a tendon.
This tendon curves anteriorly to join the tendons of the gracilis and semitendinous muscles which together form the pes anserinus, finally inserting into the proximal part of the tibia on the medial surface of its body.
Etymology
The name sartorius is the Latin word for "sartorial" (i.e. "to do with tailoring", in turn from sartor i.e. "tailor", in turn from sartus i.e. "patched" or "repaired", in turn from sarcio i.e. "to patch", "to repair").
This name was chosen in reference to the cross-legged position in which tailors once sat.
Actions
Assists in flexion, abduction and lateral rotation of hip, and flexion and medial rotation of knee. Looking at the bottom of your foot, like you are checking to see if you stepped in dog poop, demonstrates all 5 actions of sartorius.
Innervation
Situated in the anterior fascial compartment of the thigh, sartorius is innervated via branches of the femoral nerve.
Variations
Slips of origin from the outer end of the inguinal ligament, the notch of the ilium, the ilio-pectineal line or the pubis occur.
The muscle may be split into two parts, and one part may be inserted into the fascia lata, the femur, the ligament of the patella or the tendon of the Semitendinosus.
The tendon of insertion may end in the fascia lata, the capsule of the knee-joint, or the fascia of the leg.
The muscle may be absent[citation needed].
Common Injuries of the Sartorius Muscle
Overextension of the hip may cause a strain of the muscle at its attachment point (the iliac crest).
Additional images
 Bones of the right leg. Anterior surface. |
 Structures surrounding right hip-joint. |
 Muscles of the iliac and anterior femoral regions. |
 Cross-section through the middle of the thigh. |
 Muscles of the gluteal and posterior femoral regions. |
 Femoral sheath laid open to show its three compartments. |
 The left femoral triangle. |
 The lumbar plexus and its branches. |
 Front and medial aspect of right thigh. |
External links
- 208339022 at GPnotebook
- LUC sart
- SUNY Labs 14:st-0407
- Cross section at UV pembody/body15a
- 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. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
de:Musculus sartoriusfr:Sartoriusit:Sartorio nl:Musculus sartorius ja:縫工筋fi:Räätälinlihas
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
