- Stabilizes hip joint - Flexes hip

- Iliac crest; iliac fossa; - ala of the sacrum; - anterior sacroiliac ligaments

- Flexes hip - Stabilizes hip joint

- Flexes, abducts, and laterally rotates hip - Flexes knee joint - Medially rotates tibia when knee flexed

Anterior and Medial Thigh Muscles Flashcards by Katie Lohrman

Psoas Major

Origin

-Sides of T12-L5 vertebrae and intervertebral discs;

transverse processes of all lumbar vertebrae

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Psoas Major

Insertion

-Lesser trochanter of femur

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Psoas Major

Innervation

-Anterior rami of lumbar nerves (L1, L2, L3)

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Psoas Major

Action

Stabilizes hip joint

- Flexes hip

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Psoas Minor

Origin

-Sides of T12-L1 vertebrae and intervertebral discs

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Psoas Minor

Insertion

-Pectineal line and iliopectineal eminence of

pelvic bone

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Psoas Minor

Innervation

-Anterior rami of lumbar nerves (L1, L2)

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Psoas Minor

Action

-Weakly flexes lumbar spine

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Iliacus

Origin

Iliac crest; iliac fossa;
ala of the sacrum;
anterior sacroiliac ligaments

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Iliacus

Insertion

-Tendon of psoas major; lesser trochanter and femur distal to it

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Iliacus

Innervation

-Femoral nerve (L2, L3)

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Iliacus

Action

Flexes hip

- Stabilizes hip joint

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Sartorius

Origin

-Anterior superior iliac spine (ASIS)

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Sartorius

Insertion

-Superior and medial surface of tibia (pes anserine)

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Sartorius

Innervation

-Femoral nerve (L2, L3)

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Sartorius

Action

Flexes, abducts, and laterally rotates hip
Flexes knee joint
Medially rotates tibia when knee flexed

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Rectus Femoris

Origin

-Anterior inferior iliac spine (AIIS) and ilium superior

to acetabulum

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Rectus Femoris

Insertion

To patella via quadriceps tendons

- indirectly via patellar ligament to tibial tuberosity

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Rectus Femoris

Innervation

-Femoral nerve (L2, L3, L4)

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Rectus Femoris

Action

Extends knee joint
Steadies hip joint
Helps iliopsoas flex hip

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Vastus Lateralis

Origin

-Greater trochanter and lateral lip of linea aspera of

femur

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Vastus Lateralis

Insertion

-To patella via quadriceps
tendons
-indirectly via patellar ligament to tibialtuberosity

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Vastus Lateralis

Innervation

-Femoral nerve (L2, L3, L4)

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Vastus Lateralis

Action

-Extends knee joint

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Vastus Medialis | Origin

-Intertrochanteric line and the medial lip of linea aspera of femur

Vastus Medialis | Insertion

- To patella via quadriceps tendons | - indirectly via patellar ligament to tibial tuberosity

Vastus Medialis | Innervation

-Femoral nerve (L2, L3, L4)

Vastus Medialis | Action

-Extends knee joint

Vastus Intermedius | Origin

-Anterior and lateral surfaces of shaft of femur

Vastus Intermedius | Insertion

- To patella via quadriceps tendons | - indirectly via patellar ligament to tibial tuberosity

Vastus Intermedius | Innervaiton

-Femoral nerve (L2, L3, L4)

Vastus Intermedius | Action

-Extends knee joint

Pectineus | Origin

-Superior ramus of pubis

Pectineus | Insertion

-Pectineal line of femur

Pectineus | Innervation

- Femoral nerve (L2, L3) | - may receive branch fromthe obturator nerve

Pectineus | Action

-Adducts, flexes, medially rotates hip joint

Tensor Fascia Latae | Origin

-Anterior superior iliac spine (ASIS); anterior part | of iliac crest

Tensor Fascia Latae | Insertion

-Iliotibial tract, which attaches to lateral condyle | of tibia

Tensor Fascia Latae | Innervation

-Superior gluteal nerve (L5, S1)

Tensor Fascia Latae | Action

-Abducts and medially rotates hip joint

Adductor Longus | Origin

-Body of pubis inferior to pubic crest

Adductor Longus | Insertion

-Middle third of linea aspera of femur

Adductor Longus | Innervation

-Obturator nerve, branch of the anterior division (L2, | L3, L4)

Adductor Longus | Action

-Adducts hip joint

Adductor Brevis | Origin

-Body and inferior ramus of pubis

Adductor Brevis | Insertion

-Pectineal line and proximal part of linea aspera

Adductor Brevis | Innervation

-Obturator nerve, branch of the anterior division (L2, | L3, L4)

Adductor Brevis | Action

-Adducts and weakly flexes hip joint

Adductor Mangus | Origin

-Adductor part: inferior ramus of pubis and ramus of ishium -Hamstrings part: ischialtuberosity

Adductor Mangus | Insertion

-Adductor part: gluteal tuberosity, linea aspera, and medial supracondylar line of femur -Hamstring part: adductor tubercle of femur

Adductor Mangus | Innervation

-Adductor part: obturator nerve (L2, L3, L4), branches of posterior division -Hamstring part: tibial division of sciatic nerve (L4)

Adductor Mangus | Action

- Adducts hip joint - Adductor part flexes hip - Hamstring part extends hip

Gracilis | Origin

-Body and inferior ramus of pubis

Gracilis | Insertion

-Superior and medial surface of tibia (pes anserine)

Gracilis | Innervation

-Obturator nerve (L2, L3)

Gracilis | Action

- Adducts hip joint - Flexes knee joint - Medially rotates tibia

Obturator Externus | Origin

-Anterior surface of obturator membrane and | surrounding bones

Obturator Externus | Insertion

-Trochanteric fossa of femur

Obturator Externus | Innervation

-Obturator nerve (L3, L4)

Obturator Externus | Action

- Laterally rotates hip | - Steadies head of femur in acetabulum