Muscles of the Anterior Fascial
Compartment of Thigh
LEARNING OBJECT IVES
At the end of the lecture, students will be able to:
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Learn the concept of muscles of anterior compartment of thigh.
Know the nerve supply of anterior compartment.
I dea of action of these muscles.
Muscles of the Anterior Fascial
Compartment of Thigh
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Sartorius
Iliacus
Ps o a s
Pectineus
Quadriceps femoris
Sartorius
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ORIGIN:
I mmediately below anterior superior iliac spine.
INSERTION:
Upper medial surface of shaft of tibia.
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NERVE:
Anterior division of f emoral nerve (L3, 4).
ACT ION:
Flexes, abducts, laterally rotates thigh at hip. Flexes, medially
rotates leg at knee.
ILIACUS
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ORIGIN:
I liac f ossa within abdomen.
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INSERT ION:
Lowermost surf ace of lesser trochanter of f emur.
NERVE:
Femoral nerve in abdomen (L2,3).
ACT ION:
Flexes medially rotates hip.
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PSOAS MAJOR
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ORIGIN:
Transverse processes of L1-5, bodies of T12-L5 and intervertebral
discs below bodies of T12-L4.
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INSERT ION:
Middle surf ace of lesser trochanter of f emur.
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NERVE:
Anterior primary rami of L1,2.
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ACT ION:
Flexes and laterally rotates hip joint.
PECTINEUS
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ORIGIN:
Pectineal line of pubis and narrow area of superior pubic ramus
below it.
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INSERT ION:
A vertical line between spiral line and gluteal crest below lesser
trochanter of f emur.
NERVE:
Anterior division of f emoral nerve (L2, 3). Occasional twig f rom
obturator nerve (anterior division - L2,3).
ACT ION:
Flexes, adducts and medially rotates hip joint.
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RECTUS FEMORIS
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ORIGIN:
Straight head: anterior inf erior iliac spine. Ref lected head: ilium
above acetabulum.
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INSERT ION:
Quadriceps tendon to patella , via ligamentum patellae into tubercle
of tibia.
NERVE:
Posterior division of f emoral nerve (L3, 4).
ACT ION:
Extends leg at knee. Flexes thigh at hip.
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VASTUS LATERALI S
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ORIGIN:
Upper intertrochanteric line, base of greater trochanter, lateral linea
aspera, lateral supracondylar ridge and lateral intermuscular
septum.
INSERT ION:
Lateral quadriceps tendon to patella, via ligamentum patellae into
tubercle of tibia.
NERVE:
Posterior division of f emoral nerve (L3,4).
ACT ION:
Extends knee.
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VASTUS MEDIALIS
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ORIGIN:
Lower intertrochanteric line, spiral line, medial linea aspera and
medial intermuscular septum.
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INSERT ION:
Medial quadriceps tendon to patella and directly into medial patella,
via ligamentum patellae into tubercle of tibia.
NERVE:
Posterior division of f emoral nerve.
ACT ION:
Extends knee. Stabilizes patella
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VASTUS INTERMEDIALIS
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ORIGIN:
Anterior and lateral shaf t of f emur.
INSERT ION:
Quadriceps tendon to patella, via ligamentum patellae into tubercle
of tibia.
NERVE:
Posterior division of f emoral nerve (L3, 4).
ACT ION:
Extends knee.
ARTICULARI S GENU
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ORIGIN:
Two slips f rom anterior f emur below vastus intermedialius.
INSERT ION:
Apex of suprapatellar bursa.
NERVE:
Posterior division of f emoral nerve (L3, 4).
ACT ION:
Retracts bursa as knee extends.
THANKYOU