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Sartorius Muscle Anatomy: Origin, Insertion, Action, Innervation

Sartorius Muscle Anatomy Study

Sartorius Muscle Anatomy
Origin: Inferior portion of the anterior superior iliac spine
Insertion: Upper medial surface of tibial shaft at the tibial flare
Action: Assists with hip flexion, knee flexion, medial rotation of the knee, lateral rotation of the hip
Innervation: Anterior division of the femoral nerve (L3- 4)
Blood Supply: Branches from the femoral artery

Synergist:  Iliopsoas, Pectineus, Tensor fasciae latae, Adductor brevis.


 

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

 For information about symptoms and pain see: Sartorius Muscle: Hip, Upper Thigh and Knee Pain


Recommended Anatomy Study Aids

Musculoskeletal Anatomy Flashcards

Musculoskeletal 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!

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.
basic_clinical_massa


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.

 

 

 

References:

The Trigger Point Therapy Workbook – Claire Davies, Amber Davies, and David G. Simons

Basic Clinical Massage Therapy: Integrating Anatomy and Treatment – James H. Clay and David M. Pounds

Trigger Point Therapy for Myofascial Pain – Donna Finando and Steven Finando

Massage Therapy Principles and Practice – Susan Salvo

Theory & Practice of Therapeutic Massage – Mark Beck

 

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