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Sartorius Muscle Anatomy: Origin, Insertion, Action, Innervation

(Last Updated On: August 10, 2018)
Sartorius origin, insertion, action, innervation

Muscle Anatomy of the Sartorius

Origin: Inferior portion of the anterior superior iliac spine
Insertion: Proximal part of the medial surface of the tibia
Actions: Assists with hip flexion, knee flexion, medial rotation of the knee, lateral rotation of the hip
Innervation: Anterior division of the femoral nerve (L3, L4)
Blood Supply: Branches from the femoral artery

Muscle Anatomy: Sartorius Actions

Primary Actions of the Sartorius

The Sartorius is not a prime mover and does not have a primary action

Secondary Actions of the Sartorius:

1. Assists with flexion of the thigh at the hip

  Agonists:

  •  Psoas Major
  • Iliacus

  Antagonists:

  • Gluteus Maximus
  • Semitendinosus
  • Semimembranosus
  • Biceps Femoris (long head)
  • Adductor Magnus (posterior part)

2. Assists with external rotation of the thigh at hip

  Agonists:

  • Obturator Internus
  • Obturator Externus
  • Gemellus Superior
  • Gemellus Inferior
  • Quadratus Femoris

  Antagonists:

  • Tensor Fasciae Latae
  • Gluteus Minimus (anterior fibers)
  • Gluteus Medius (anterior fibers)

3. Assists with abduction of the thigh at the hip

  Agonists:

  • Gluteus Maximus (upper fibers)
  • Gluteus Medius
  • Gluteus Minimus

  Antagonists:

  • Adductor Longus
  • Adductor Brevis
  • Adductor Magnus

4. Assists with flexion of the knee

  Agonists:

  • Biceps Femoris
  • Semitendinosus
  • Semimembranosus

  Antagonists:

  • Vastus Lateralis
  • Vastus Intermedius
  • Vastus Medialis
  • Rectus Femoris

5. Assists with internal rotation of the knee when flexed

  Agonists:

  • Popliteus
  • Semitendinosus
  • Semimembranosus

  Antagonists: Biceps Femoris

Information about cause and effect of Sartorius pain:

 Sartorius Muscle: Hip, Upper Thigh and Knee Pain

Recommended Anatomy Books:

Anatomy Coloring Book

The Anatomy Coloring Book is one of the best study and reference books for beginning anatomy students. The diagrams are clearly labeled and allow you to see the relationship and placement of the various structures of the body. You will also be surprised how the act of coloring will help with recall. But this is not just a beginners book, it is also great for practitioners and therapists to have on hand to use with clients and patients to use as a visual reference.

Human Muscle Anatomy

The Trail Guide To The Body is another excellent book to help you learn the musculature of the human body. Though the book is geared toward massage therapists and physical therapist assistants, the book with its illustrations and text helps anyone gain a thorough understanding of the human musculoskeletal system and movement. I highly recommend this book for anyone studying anatomy and believe that MTs, PTAs, and teachers of body movements should have this book in their possession. I also highly recommend this book for the lay person who wants to gain understanding of the muscle, skeletal system and how our bodies move. This book will not disappoint!

Basic Clinical Massage Therapy

Out of the scores of books in my office Basic Clinical Massage Therapy is by far the most referenced book in my library. The musculoskeletal system is overlaid on human models allowing you to learn the precise location, origin and insertions of each muscle. The models are pictured in various poses throughout the book which also helps you visualize muscles in motion and their actions relationship with the skeletal structure and other muscles. Though it is written for massage therapists, it is an excellent book for anyone who wants to learn about the muscular system. MT's will benefit from recommended treatments for each muscle.

Muscle Anatomy Flashcards

Musculoskeletal Anatomy Flashcards Are you a student or professional therapist who needs to brush up on the musculoskeletal system? Dr. Joseph E. Muscolino DC has developed a comprehensive set of flashcards that will help develop a mind's picture of exactly where the muscles lie under the skin. A highly recommended study aid for students. Great for non students who want an easy comprehensive anatomy guide.

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