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Information about Sartorius Muscle

Sartorius muscle
Muscles of lower extremity. (Rectus femoris removed to reveal the vastus intermedius.)
Latinmusculus sartorius
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.

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

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.
 •  • [ e]
Muscles of lower limbs
ILIAC REGION/ILIOPSOASpsoas major - psoas minor - iliacus
BUTTOCKSgluteals: (maximus, medius, minimus) - tensor fasciae latae
lateral rotator group: piriformis - obturator externus - obturator internus - inferior gemellus - superior gemellus - quadratus femoris
THIGHanterior compartment: sartorius - quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) - articularis genu
medial compartment/adductor: gracilis - pectineus - adductor brevis - adductor longus - adductor magnus
posterior compartment/hamstring: biceps femoris - semitendinosus, semimembranosus
LEGanterior compartment: tibialis anterior - extensor hallucis longus - extensor digitorum longus - fibularis tertius
posterior compartment: superficial - calf/triceps surae (gastrocnemius, soleus) - plantaris deep - popliteus - tarsal tunnel (flexor hallucis longus - flexor digitorum longus - tibialis posterior)
lateral compartment: fibularis muscles (longus - brevis)
FOOTdorsal - extensor digitorum brevis - extensor hallucis brevis
plantar first layer - abductor hallucis - flexor digitorum brevis - abductor digiti minimi
plantar second layer - quadratus plantae - lumbrical muscle
plantar third layer - flexor hallucis brevis - adductor hallucis - flexor digiti minimi brevis
plantar fourth layer - dorsal interossei - plantar interossei
The Rectus femoris muscle is one of the four quadriceps muscles of the human body. (The others are the vastus medialis, the vastus intermedius (deep to the rectus femoris), and the vastus lateralis.
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The Vastus intermedius (Crureus) arises from the front and lateral surfaces of the body of the femur in its upper two-thirds and from the lower part of the lateral intermuscular septum.
..... Click the link for more information.
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
..... Click the link for more information.
bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
..... Click the link for more information.
The anterior superior iliac spine (ASIS) is an important landmark of surface anatomy. It refers to the anterior extremity of the iliac crest of the pelvis, which provides attachment for the inguinal ligament and the sartorius muscle.
..... Click the link for more information.
bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
..... Click the link for more information.
tibia is the larger of the two bones in the leg below the knee in vertebrates.

In humans

The tibia or shin bone, in human anatomy, is found medial (towards the middle) and anterior (towards the front) to the other such bone, the fibula.
..... Click the link for more information.
The pes anserinus ("goose's foot") is the insertion of the conjoined tendons of three muscles onto the anteromedial proximal tibia bone (from anterior to posterior):[1]
  • sartorius
  • gracilis
  • semitendinosus

..... Click the link for more information.
Arteries are muscular blood vessels that carry blood away from the heart.[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

The circulatory system is extremely important for sustaining life.
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The femoral artery is a large artery in the muscles of the thigh.

Structure

The femoral artery is a continuation of the external iliac artery, which comes from the abdominal aorta.
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  • Accessory nerve
  • Accessory obturator nerve
  • Alderman's nerve
  • Anococcygeal nerve
  • Ansa cervicalis
  • Anterior interosseous nerve
  • Anterior superior alveolar nerve
  • Aortic plexus
  • Auerbach's plexus
  • Auriculotemporal nerve
  • Axillary nerve

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The femoral nerve, the largest branch of the lumbar plexus, arises from the dorsal divisions of the second, third, and fourth lumbar nerves. It descends through the fibers of the Psoas major, emerging from the muscle at the lower part of its lateral border, and passes down between
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. [1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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flexion is a position that is made possible by the joint angle decreasing. The skeletal (bones, cartilage, and ligaments) and muscular (muscles and tendons) systems work together to move the joint into a "flexed" position.
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In human anatomy, the knee is the lower extremity joint connecting the femur and the tibia. Since in humans the knee supports nearly the entire weight of the body, it is the joint most vulnerable both to acute injury and to the development of osteoarthritis.
..... Click the link for more information.
flexion is a position that is made possible by the joint angle decreasing. The skeletal (bones, cartilage, and ligaments) and muscular (muscles and tendons) systems work together to move the joint into a "flexed" position.
..... Click the link for more information.
A leg is the part of an animal's body that supports the rest of the animal above the ground between the ankle and the hip and is used for locomotion. The end of the leg furthest from the animal's body is often either modified or attached to another structure that is
..... Click the link for more information.
Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
..... Click the link for more information.
In humans the thigh is the area between the pelvis and buttocks and the knee. Anatomically, it is part of the lower limb.

The single bone in the thigh is called the femur.
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The femoral triangle (of Scarpa) is an anatomical region of the upper inner human thigh.

Boundaries

It is bounded by:
  • (superiorly) the inguinal ligament
  • (medially) the adductor longus muscle border) (medial border)

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The anterior superior iliac spine (ASIS) is an important landmark of surface anatomy. It refers to the anterior extremity of the iliac crest of the pelvis, which provides attachment for the inguinal ligament and the sartorius muscle.
..... Click the link for more information.
In humans the thigh is the area between the pelvis and buttocks and the knee. Anatomically, it is part of the lower limb.

The single bone in the thigh is called the femur.
..... Click the link for more information.
In human anatomy, the knee is the lower extremity joint connecting the femur and the tibia. Since in humans the knee supports nearly the entire weight of the body, it is the joint most vulnerable both to acute injury and to the development of osteoarthritis.
..... Click the link for more information.
Medial condyle can refer to:
  • Medial condyle of tibia
  • Medial condyle of femur

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The Gracilis (Latin: slender) is the most superficial muscle on the medial side of the thigh. It is thin and flattened, broad above, narrow and tapering below. It arises by a thin aponeurosis from the anterior margins of the lower half of the symphysis pubis and the upper
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The semitendinosus is a muscle in the back of the thigh; it is one of the hamstrings.

Structure

The semitendinosus, remarkable for the great length of its tendon of insertion, is situated at the posterior and medial aspect of the thigh.
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The pes anserinus ("goose's foot") is the insertion of the conjoined tendons of three muscles onto the anteromedial proximal tibia bone (from anterior to posterior):[1]
  • sartorius
  • gracilis
  • semitendinosus

..... Click the link for more information.
tibia is the larger of the two bones in the leg below the knee in vertebrates.

In humans

The tibia or shin bone, in human anatomy, is found medial (towards the middle) and anterior (towards the front) to the other such bone, the fibula.
..... Click the link for more information.
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
..... Click the link for more information.


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