MSK - Anterior Thigh Muscles (Knee Extensors) Flashcards by Beth Elliott | Brainscape

Q

What are the four knee extensor muscles that make up the Quadriceps Femoris?

A

Rectus Femoris
Vastus Lateralis
Vastus Intermedius
Vastus Medialis

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Q

What are the origins of the Rectus Femoris?

A

Anterior Inferior Iliac Spine

- Superior to Acetabulum

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Q

Where does the Rectus Femoris insert?

A

Patella via the quadriceps tendon

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Q

What is the innvervation of the Rectus Femoris?

A

Femoral Nerve (L3, L4)

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Q

What are the actions of the Rectus Femoris?

A

Flexion of the leg at the hip joint

- Extension of the leg at the knee joint

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Q

What are the origins of the Vastus Lateralis?

A

Greater Trochanter
Intertrochanteric Crest
Linea Aspera of Femur

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Q

Where does the Vastus Lateralis insert?

A

Patella via the quadriceps tendon

- Tibial tuberosity via patellar ligament

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Q

What is the innervation of the Vastus Lateralis?

A

Femoral Nerve (L2-L4)

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Q

What is the action of the Vastus Lateralis?

A

Extension of the leg at the knee joint

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Q

What is the origin of the Vastus Intermedius?

A

Anteriolateral aspect of the femoral shaft

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Q

Where does the Vastus Intermedius insert?

A

Patella via the quadriceps tendon

- Tibial tuberosity via patellar ligament

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Q

What is the innervation of the Vastus Intermedius?

A

Femoral Nerve (L2-L4)

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Q

What is the action of the Vastus Intermedius?

A

Extension of the leg at the knee joint

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Q

What is the origin of the Vastus Medialis?

A

Linea Aspera

- Intertrochanteric Line of femur

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Q

Where does the Vastus Medialis insert?

A

Patella via the quadriceps tendon

- Tibial tuberosity via patellar ligament

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Q

What is the innervation of the Vastus Medialis?

A

Femoral Nerve (L2-L4)

Q

What are the actions of the Vastus Medialis?

A

Extension of the leg at the knee joint