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Muscles: Articularis Genus.

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Anatomy & Physiology: Muscles—Articularis Genus.

Structure.

  • Origin: anterior distal femoral shaft.
  • Insertion: knee joint capsule.

Function.

  • Concentric action: tense and pull knee joint capsule proximally.
  • Reverse mover action:
  • Eccentric action: controls/restrains/decelerates distal movement of knee joint capsule.
  • Isometric action: stabilization of the knee.
  • Innervation: femoral nerve.
  • Arterial supply: deep femoral artery.

Clinical Significance.

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Vastus Intermedius.

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Anatomy & Physiology: Muscles—Vastus Intermedius.

Structure.

  • Origin: anterior and lateral surfaces of femur.
  • Insertion: base of patella, tibial tuberosity.

Function.

  • Concentric action: accelerate knee extension.
  • Reverse mover action: thigh extension.
  • Eccentric action: decelerates knee flexion.
  • Isometric action: stabilization of the knee.
  • Innervation: femoral nerve.
  • Arterial supply: deep femoral artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Vastus Medialis.

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Anatomy & Physiology: Muscles—Vastus Medialis.

Structure.

  • Origin: linea aspera of femur.
  • Insertion: base of patella, tibial tuberosity.

Function.

  • Concentric action: accelerate knee extension.
  • Reverse mover action: thigh extension.
  • Eccentric action: decelerates knee flexion.
  • Isometric action: stabilization of the knee.
  • Innervation: femoral nerve.
  • Arterial supply: femoral artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Vastus Lateralis.

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Anatomy & Physiology: Muscles—Vastus Lateralis.

Structure.

  • Origin: greater trochanter and linea aspera of femur.
  • Insertion: patella via quadriceps tendon and tibial tuberosity via patellar ligament.

Function.

  • Concentric action: accelerate knee flexion.
  • Reverse mover action: thigh extension.
  • Eccentric action: decelerates knee extension.
  • Isometric action: stabilization of the knee.
  • Innervation: femoral nerve.
  • Arterial supply: femoral artery, popliteal artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Rectus Femoris.

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Anatomy & Physiology: Muscles—Rectus Femoris.

Structure.

  • Origin: anteroinferior iliac spine of the pelvis.
  • Insertion: base of patella, tibial tuberosity.

Function.

  • Concentric action: accelerate knee extension and hip flexion.
  • Reverse mover action: thigh extension and anterior pelvic tilt.
  • Eccentric action: decelerates knee flexion and hip extension.
  • Isometric action: stabilization of the knee and lumbo-pelvic hip complex.
  • Innervation: femoral nerve.
  • Arterial supply: femoral artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Quadratus Femoris.

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Anatomy & Physiology: Muscles—Quadratus Femoris.

Structure.

  • Origin: ischial tuberosity.
  • Insertion: superior to mid-portion of intertrochanteric crest (quadrate tubercle) on posterior femur.
  • Of deep lateral rotator group.

Function.

  • Concentric action: lateral rotation.
  • Reverse mover action: contralateral rotation of pelvis.
  • Eccentric action: decelerates internal/medial rotation.
  • Isometric action: stabilization hip and sacroiliac joints.
  • Innervation: nerve to quadratus femoris.
  • Arterial supply: inferior gluteal artery, obturator artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Obturator Externus.

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Anatomy & Physiology: Muscles—Obturator Externus.

Structure.

  • Origin: inner surface of obturator membrane.
  • Insertion: deep depression inferior to greater tochanter (trochanteric fossa) of femur.
  • Of deep lateral rotator group.

Function.

  • Concentric action: accelerates abduction, and external/lateral rotation.
  • Reverse mover action: contralateral rotation of pelvis.
  • Eccentric action: decelerates adduction and internal/medial rotation.
  • Isometric action: stabilization hip and sacroiliac joints.
  • Innervation: obturator nerve.
  • Arterial supply: obturator artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Inferior Gemellus.

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Anatomy & Physiology: Muscles—Inferior Gemellus.

Structure.

  • Origin: ischial tuberosity.
  • Insertion: medial surface of greater trochanter of femur.
  • Of deep lateral rotator group.

Function.

  • Concentric action: lateral rotation, hip abduction.
  • Reverse mover action: contralateral rotation of pelvis.
  • Eccentric action: decelerates adduction and internal/medial rotation.
  • Isometric action: stabilization hip and sacroiliac joints.
  • Innervation: nerve to quadratus femoris.
  • Arterial supply: inferior gluteal artery and obturator artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Obturator Internus.

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Anatomy & Physiology: Muscles—Obturator Internus.

Structure.

  • Origin: inner surface of obturator foramen pubis, and ischium.
  • Insertion: medial surface of greater trochanter of femur.
  • Of deep lateral rotator group.

Function.

  • Concentric action: accelerates abduction, and external/lateral rotation.
  • Reverse mover action: contralateral rotation of pelvis.
  • Eccentric action: decelerates adduction and internal/medial rotation.
  • Isometric action: stabilization hip and sacroiliac joints.
  • Innervation: nerve to obturator internus.
  • Arterial supply: superior and inferior gluteal arteries; obturator artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.

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Muscles: Superior Gemellus.

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Anatomy & Physiology: Muscles—Superior Gemellus.

Structure.

  • Origin: ischial spine.
  • Insertion: medial surface of greater trochanter of femur.
  • Of deep lateral rotator group.

Function.

  • Concentric action: lateral rotation, hip abduction.
  • Reverse mover action: contralateral rotation of pelvis.
  • Eccentric action: decelerates adduction and internal/medial rotation.
  • Isometric action: stabilization hip and sacroiliac joints.
  • Innervation: nerve to obturator internus.
  • Arterial supply: inferior gluteal artery.

Clinical Significance.

More.

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.