Anterior and medial thigh Flashcards by Amy Kreider

What is the insertion of iliopsoas?

Lesser trochanter

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What is the innervation of iliopsoas?

Psoas major: direct branches from the lumbar plexus (psoas) (L2-L4)
Iliacus: femoral n. (L2-L4)

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What are the actions of iliopsoas?

Hip joint: flexion and external rotation
Lumbar spine: unilateral contraction (with the femur fixed) bends the trunk laterally to the same side; bilateral contraction raises the trunk from the supine position

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What is the origin of sartorius?

Anterior superior iliac spine

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What is the insertion of sartorius?

Medial to the tibial tuberosity (together with gracilis and semitendinosus)

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What is the innervation of sartorius?

Femoral n. (L2, L3)

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What are the actions of sartorius?

Hip joint: flexion, abduction, and external rotation

Knee joint: flexion and internal rotation

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What is the origin of rectus femoris?

Anterior inferior iliac spine, acetabular roof of hip joint

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What is the insertion of rectus femoris?

Tibial tuberosity (via patellar ligament)

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What is the innervation of rectus femoris?

Femoral n. (L2-L4)

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What are the actions of rectus femoris?

Hip joint: flexion

Knee joint: extension

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What is the origin of vastus medialis?

Linea aspera (medial lip), intertrochanteric line (distal part)

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What is the insertion of vastus medialis?

Both sides of tuberosity on the medial and lateral condyles (via the medial and longitudinal patellar retinacula)

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What is the innervation of vastus medialis?

Femoral n. (L2-L4)

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What are the actions of vastus medialis?

Knee joint: extension

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What is the origin of vastus lateralis?

Linea aspera (lateral lip), greater trochanter (lateral surface)

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What is the insertion of vastus lateralis?

Both sides of tuberosity on the medial and lateral condyles (via the medial and longitudinal patellar retinacula)

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What is the innervation of vastus lateralis?

Femoral n. (L2-L4)

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What are the actions of vastus lateralis?

Knee joint: extension

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What is the origin of vastus intermedius?

Femoral shaft (anterior side)

What is the insertion of vastus intermedius?

Tibial tuberosity (via patellar ligament)

What is the innervation of vastus intermedius?

Femoral n. (L2-L4)

What are the actions of vastus intermedius?

Knee joint: extension

What is the origin of pectineus?

Pecten pubis

What is the insertion of pectineus?

Femur (pectineal line and the proximal linea aspera)

What is the innervation of pectineus?

Femoral n., obturator n. (L2, L3)

What are the actions of pectineus?

Hip joint: adduction, external rotation, and slight flexion | Stabilizes the pelvis in the coronal and sagittal planes

What is the origin of obturator externus?

Outer surface of the obturator membrane and its bony boundaries

What is the insertion of obturator externus?

Trochanteric fossa of the femur

What is the innervation of obturator externus?

Obturaotr n. (L3, L4)

What are the actions of obturator externus?

Hip joint: adduction and external rotation | Stabilizes the pelvis in the sagittal plane

What is the origin of adductor longus?

Superior pubic ramus and anterior side of the pubic symphysis

What is the insertion of adductor longus?

Femur (linea aspera, medial lip in the middle third of the femur)

What is the innervation of adductor longus?

Obturator n. (L2-L4)

What are the actions of adductor longus?

Hip joint: adduction and flexion (up to 70 degrees); extension (past 80 degrees of flexion) Stabilizes the pelvis in the coronal and sagittal planes

What is the origin of adductor brevis?

Inferior pubic ramus

What is the insertion of adductor brevis?

Femur (linea aspera, medial lip in the proximal one third of the femur); pectineal line

What is the innervation of adductor brevis?

Obturator n. (L2, L3)

What are the actions of adductor brevis?

Hip joint: adduction and flexion (up to 70 degrees); extension (past 80 degrees of flexion) Stabilizes the pelvis in the coronal and sagittal planes

What is the origin of adductor magnus?

Inferior pubic ramus, ischial ramus, and ischial tuberosity

What is the insertion of adductor magnus?

``` Deep part ("fleshy insertion"): medial lip of the linea aspera Superficial part ("tendinous insertion"): adductor tubercle of the femur ```

What is the innervation of adductor magnus?

Deep part: obturator n. (L2-L4) | Superficial part: Tibial n. (L4)

What are the actions of adductor magnus?

Hip joint: adduction, extension, and slight flexion (the tendinous insertion is also active in internal rotation) Stabilizes the pelvis in the coronal and sagittal plane

What is the origin of gracilis?

Inferior pubic ramus below the pubic symphysis

What is the insertion of gracilis?

Tibia (medial border of the tuberosity, along with the tendons of sartorius and semitendinosus)

What is the innervation of gracilis?

Obturator n. (L2, L3)

What are the actions of gracilis?

Hip joint: adduction and flexion | Knee joint: flexion and internal rotation

What is the origin of iliopsoas?

Psoas major: Superficial: T12-L4 and associated intervertebral disks (lateral surfaces) Deep: L1-L5 vertebrae (transverse processes) Iliacus: iliac fossa