Sartorius muscle - wikipedia Sartorius muscle Sartorius muscle Muscles of lower thigh. ( Rectus femoris removed to reveal the vastus intermedius. ) Details Origin Anterior superior iliac spine of the pelvic bone Insertion anteromedial surface of the upper tibia in the pes anserinus Artery femoral artery Nerve femoral nerve ( sometimes from the intermediate cutaneous nerve of thigh ) Actions Flexion, abduction, and lateral rotation of the hip, flexion of the knee Identifiers Latin musculus sartorius Dorlands / Elsevier m_22 / 12547605 TA A04. 7.02. 016 FMA 22353 Anatomical terms of muscle ( edit on Wikidata ) The sartorius muscle ( / sɑːrˈtɔːri. əs / ) 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. Contents 1 Structure 1.1 Nerve supply 1.2 Variation 2 Function 3 Clinical significance 4 History 4.1 Etymology 5 Additional images 6 References 7 External links Structure 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 pes anserinus, where it inserts into the superomedial surface of the tibia. Its upper portion forms the lateral border of the femoral triangle, and the point where it crosses adductor longus marks the apex of the triangle. Deep to sartorius and its fascia is the adductor canal, through which the saphenous nerve, femoral artery and vein, and nerve to vastus medialis pass. Nerve supply Like the other muscles in the anterior compartment of the thigh, sartorius is innervated by the femoral nerve. Variation It may originate from the outer end of the inguinal ligament, the notch of the ilium, the ilio - pectineal line or the pubis. 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 in some people. Function 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 thigh. At the knee, it can flex the leg ; when the knee is flexed, sartorius medially rotates the leg. Turning the foot to look at the sole or sitting cross-legged demonstrates all four actions of the sartorius. Clinical significance One of the many conditions that can disrupt the use of the sartorius is pes anserine bursitis, an inflammatory condition of the medial portion of the knee. This condition usually occurs in athletes from overuse and is characterized by pain, swelling and tenderness. The pes anserinus is made up from the tendons of the gracilis, semitendinosus, and sartorius muscles ; these tendons attach onto the anteromedial proximal tibia. When inflammation of the bursa underlying the tendons occurs they separate from the head of the tibia. History Etymology Sartorius comes from the Latin word sartor, meaning tailor, and it is sometimes called the tailor 's muscle. This name was chosen in reference to the cross-legged position in which tailors once sat. In french, the muscle name itself `` couturier '' comes from this specific position which is referred to as `` sitting as a tailor '' ( in french : `` s'asseoir en tailleur '' ). There are other hypotheses as to the genesis of the name. One is that it refers to the location of the inferior portion of the muscle being 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. Additionally, antique sewing machines required continuous cross body pedaling. This combination of lateral rotation and flexion of the hip and flexion of the knee gave tailors particularly enlarged sartorius muscles. Sartorius is also called as honeymoon muscle. Additional images Muscles of the iliac and anterior femoral regions. Cross-section through the middle of the thigh. The left femoral triangle. Front and medial aspect of right thigh. Sartorius muscle Sartorius muscle Sartorius muscle Sartorius muscle Sartorius muscle Sartorius muscle Muscles of thigh. Cross section. References This article incorporates text in the public domain from the 20th edition of Gray 's Anatomy ( 1918 ) ^ Jump up to : Moore, Keith ; Anne Agur ( 2007 ). Essential Clinical Anatomy. Lippincott Williams & Wilkins. p. 334. ISBN 0 - 7817 - 6274 - X. ^ Jump up to : Moore, Keith L. ; Dalley, Arthur F. ; Agur, A.M.R. ( 2013 - 02 - 13 ). Clinically Oriented Anatomy. Lippincott Williams & Wilkins. pp. 545 -- 546. ISBN 9781451119459. Jump up ^ Scott - Conner, Carol E.H. ; David L. Dawson ( 2003 ). Operative Anatomy. Lippincott Williams & Wilkins. p. 606. ISBN 0 - 7817 - 3529 - 7. Jump up ^ Mosby 's Medical, Nursing & Allied Health Dictionary, Fourth Edition, Mosby - Year Book Inc., 1994, p. 1394 External links Anatomy photo : 14 : st - 0407 at the SUNY Downstate Medical Center Cross section image : pembody / body15a -- Plastination Laboratory at the Medical University of Vienna Cross section image : pelvis / pelvis - e12 - 15 -- Plastination Laboratory at the Medical University of Vienna Muscles of the hip and human leg Iliac region Iliopsoas psoas major / psoas minor iliacus Buttocks Gluteal muscles maximus medius minimus tensor fasciae latae lateral rotator group : quadratus femoris inferior gemellus superior gemellus internal obturator external obturator piriformis Thigh / compartments Anterior sartorius quadriceps rectus femoris vastus lateralis vastus intermedius vastus medialis articularis genus Posterior hamstring biceps femoris semitendinosus semimembranosus Medial pectineus external obturator gracilis adductor longus brevis magnus minimus Fascia Femoral sheath Femoral canal Femoral ring Adductor canal Adductor hiatus Muscular lacuna fascia lata Iliotibial tract Lateral intermuscular septum of thigh Medial intermuscular septum of thigh Cribriform fascia Leg / compartments Anterior tibialis anterior extensor hallucis longus extensor digitorum longus peroneus tertius Posterior superficial triceps surae gastrocnemius soleus accessory soleus Achilles tendon plantaris deep tarsal tunnel flexor hallucis longus flexor digitorum longus tibialis posterior popliteus Lateral peroneus muscles longus brevis Fascia Pes anserinus Intermuscular septa anterior posterior transverse Foot Dorsal extensor hallucis brevis extensor digitorum brevis Plantar 1st layer abductor hallucis flexor digitorum brevis abductor digiti minimi 2nd layer quadratus plantae lumbrical muscle 3rd layer flexor hallucis brevis adductor hallucis flexor digiti minimi brevis 4th layer dorsal interossei plantar interossei Fascia Plantar fascia retinacula Peroneal Inferior extensor Superior extensor Flexor Retrieved from `` https://en.wikipedia.org/w/index.php?title=Sartorius_muscle&oldid=809508994 '' Categories : Wikipedia articles incorporating text from the 20th edition of Gray 's Anatomy ( 1918 ) Hip abductors Hip flexors Hip lateral rotators Knee flexors Thigh muscles Anterior compartment of thigh Muscles of the lower limb Hidden categories : Medicine infobox template using GraySubject or GrayPage Medicine infobox template using Dorlands parameter Talk Contents About Wikipedia Български Català Čeština Deutsch Español فارسی Français Hrvatski Italiano עברית Latina Magyar Nederlands 日本 語 Polski Português Русский Slovenščina Suomi Svenska 中文 Edit links This page was last edited on 9 November 2017, at 15 : 55. 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Question: which is the longest muscle in human body
Answer: sartorius muscle