Sartorius Muscle

Authors
Affiliations

Doctor of Physical Therapy

B.S. in Kinesiology

Doctor of Physical Therapy

B.A. in Neuroscience

Figure 1: Hip and Thigh Muscles

Muscles of the Iliac and Anterior femoral regions2

Muscles of the Iliac and Anterior femoral regions

Cross-section of middle thigh2

Cross-section of middle thigh
Figure 2: Muscles of the gluteal and posterior femoral region
Reading list
  • Ch58 Quadriceps femoris and sartorius muscles
  • Neuman
  • MMT
Muscle Origin Insertion Innervation Action
Sartorius ASIS Pes anserine Femoral n.
L2 - L3
Hip: Flexion, ER, Abduction
Knee: Flexion, IR

Overview

The Sartorius comes from latin sartor meaning “tailor” since it moves the leg into the cross-legged sitting position a tailor would use when sewing ( hip abduction, external rotation, and flexion).

The sartorius is the longest muscle in the body.

The sartorius is a fusiform muscle.

Origin

ASIS

Insertion

Medial to the Tibial Tuberosity via the Pes Anserine tendon

Nerve

Femoral N. (L2, L3)

Action

The sartorius muscle acts primarily as a hip flexor.

  • Hip: Flexion, ER, ABD
  • Knee: Flexion, IR

Palpation

  1. Supine

  2. Ipsilateral foot resting on the opposite knee

  3. Ipsilateral hip in flexion, external rotation and slight abduction.

  4. Place hand along the middle of the medial thigh.

  5. Instruct the patient to contract the sartorius (raise their knee toward the ceiling).

  6. “strum” your fingers across the sartorius

  7. Follow the muscle from its superior-lateral origin distally to its inferior-medial insertion.

  8. Ask the patient to relax

  9. Continue to palpate

Note

Note how the sartorius curves from the ASIS to the medial side of the thigh

Width

  • The sartorius and gracilis are slender muscles, especially when compared to the quadriceps.
  • The muscle belly of the sartorius should be “2 fingers” wide and superficial.

Depth

The sartorius should be superficial since it runs above the quadriceps and other muscles of the thigh.

Position

If you are palpating the sartorius, you will be medial to the vastus medialis muscle belly.

Direction

The sartorius and gracilis both insert on the common tendon of the Pes Anserine, causing it to be difficult to differentiate between these two muscles distally.

The best way to differentiate between these two muscles is to follow the direction of their muscle belly proximally.

  • The sartorius will course superior laterally toward the ASIS
  • The gracilis will course superior-medially towards it origin at the pubic tubercle.

Muscle length test (MLT)

Stretches

References

1.
Betts JG, Blaker W. Anatomy and Physiology. 2nd ed. OpenStax; 2022. https://openstax.org/details/books/anatomy-and-physiology-2e/?Book%20details
2.
Gray H. Anatomy of the Human Body. 20th ed. (Lewis WH, ed.). Lea & Febiger; 1918. https://www.bartleby.com/107/
3.
Donnelly JM, Simons DG, eds. Travell, Simons & Simons’ Myofascial Pain and Dysfunction: The Trigger Point Manual. Third edition. Wolters Kluwer Health; 2019.
4.
Neumann DA, Kelly ER, Kiefer CL, Martens K, Grosz CM. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed. Elsevier; 2017.
5.
Weinstock D. NeuroKinetic Therapy: An Innovative Approach to Manual Muscle Testing. North Atlantic Books; 2010.
6.
Biel A. Trail Guide to the Body: A Hands-on Guide to Locating Muscles, Bones, and More. 6th ed. Books of Discovery; 2019.
7.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.
8.
Jones B. B Project Foundations. b Project; 2025.

Citation

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