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Thigh

From Wikipedia, the free encyclopedia
Body part between pelvis and knee; upper leg
For other uses, seeThigh (disambiguation).
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Thigh
A woman's thighs
Cross-section of the thigh showing muscles and bone (latin terminology)
Details
Identifiers
Latinfemur
MeSHD013848
TA98A01.1.00.035
TA2160
FMA24967
Anatomical terminology

Inanatomy, thethigh is the area between thehip (pelvis) and theknee. Anatomically, it is part of thelower limb.[1]

The singlebone in the thigh is called thefemur. This bone is very thick and strong (due to the high proportion ofbone tissue), and forms aball and socket joint at thehip, and a modifiedhinge joint at the knee.[2]

Structure

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Bones

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Main article:Femur

Thefemur is the only bone in the thigh and serves as an attachment site for all thigh muscles. Thehead of the femur articulates with theacetabulum in thepelvic bone forming thehip joint, while thedistal part of the femur articulates with thetibia andpatella forming theknee. By most measures, the femur is the strongest and longest bone in the body.[3]

The femur is categorised as along bone and comprises adiaphysis,the shaft (or body) and twoepiphyses, thelower extremity and theupper extremity of femur, that articulate with adjacent bones in the hip and knee.[4]

Muscular compartments

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Main article:Fascial compartments of thigh

In cross-section, the thigh is divided up into three separate compartments, divided byfascia, each containing muscles. These compartments use the femur as an axis and are separated by toughconnective tissue membranes (orsepta). Each of these compartments has its ownblood andnerve supply, and contains a different group ofmuscles.

Anterior compartment muscles of the thigh includesartorius, and the four muscles that comprise thequadriceps musclesrectus femoris,vastus medialis,vastus intermedius andvastus lateralis.

Posterior compartment muscles of the thigh are thehamstring muscles, which includesemimembranosus,semitendinosus, andbiceps femoris.

Medial compartment muscles arepectineus,adductor magnus,adductor longus andadductor brevis, and alsogracilis.

Because the major muscles of the thigh are the largest muscles of the body, resistance exercises (strength training) of them stimulate blood flow more than any other localized activity.[5]

Blood supply

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Main blood vessels of the thigh.[6]

The arterial supply is by thefemoral artery and theobturator artery. The lymphatic drainage closely follows the arterial supply and drains to the lumbar lymphatic trunks on the corresponding side, which in turn drains to thecisterna chyli.

The deep venous system of the thigh consists of thefemoral vein,common femoral vein,deep femoral vein, the proximal part of thepopliteal vein, and various smaller vessels; these are the site of proximaldeep vein thrombosis. Theperforating veins connect the deep and the superficial system, which consists of thesmall andgreat saphenous veins (the site ofvaricose veins).[7]

Clinical significance

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Thigh weakness can result in a positiveGowers' sign on physical examination.[8]

Thigh injuryresulting from sports, whetheracute or fromoveruse, can mean significant incapacity to perform.Soft tissue injury can encompasssprains,strains,bruising andtendinitis.

Runner's knee (patellofemoral pain) is a direct consequence of the kneecap rubbing against the end of the thigh bone (femur). Tight hamstrings and weak thigh muscles, required to stabilize the knee, increase the risk of developing of runner's knee.[9]

Society and culture

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Thigh gap

Western societies generally tolerate clothing that displays thighs, such asshort shorts andminiskirts.Beachwear and manyathleisure styles often display thighs as well. Professional dress codes may require covering up bare thighs.

ManyIslamic countries disapprove of or prohibit the display of thighs, especially by women.

Strategic covering or display of thighs is used in popular fashion around the world, such asthigh-high boots andzettai ryoiki.

Additional images

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  • Front of thigh muscles from Gray's Anatomy of the human body from 1918.
    Front of thigh muscles from Gray's Anatomy of the human body from 1918.
  • Back thigh muscles of the gluteal and posterior femoral regions from Gray's Anatomy of the human body from 1918.
    Back thigh muscles of the gluteal and posterior femoral regions from Gray's Anatomy of the human body from 1918.
  • Also showing major blood vessels and nerves.
    Also showing major blood vessels and nerves.
  • Cross-section through the middle of the thigh.
    Cross-section through the middle of the thigh.
  • The obturator externus

References

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Look upthigh in Wiktionary, the free dictionary.
Wikimedia Commons has media related toThigh.
  1. ^"thigh" atDorland's Medical Dictionary[dead link]
  2. ^"Thigh".Cambridge Dictionary. Retrieved2021-06-23.
  3. ^"Facts About Bones in Your Skeleton". Hospital for Special Surgery.
  4. ^Bojsen-Møller, Finn; Simonsen, Erik B.; Tranum-Jensen, Jørgen (2001).Bevægeapparatets anatomi [Anatomy of the Locomotive Apparatus] (in Danish) (12th ed.). pp. 239–241.ISBN 978-87-628-0307-7.
  5. ^Cespedes, Andrea."How Important Are Leg Workouts for Muscle Gain?".
  6. ^Amarnath C and Hemant Patel (2023).Comprehensive Textbook of Clinical Radiology – Volume III: Chest and Cardiovascular system.Elsevier Health Sciences. p. 1072.ISBN 9788131263617.
  7. ^"Thigh".The Lecturio Medical Concept Library. Retrieved2021-06-23.
  8. ^Chang, Richard F.; Mubarak, Scott J. (2011-12-28)."Pathomechanics of Gowers' Sign: A Video Analysis of a Spectrum of Gowers' Maneuvers".Clinical Orthopaedics and Related Research.470 (7):1987–1991.doi:10.1007/s11999-011-2210-6.PMC 3369091.PMID 22203329.
  9. ^"Medically Sound: Field, Court, and Course Related Injuries – Sports Injuries".Medically Sound. 2020-08-31. Retrieved2020-11-01.
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