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Sartorius

Region

Origin & Insertion

['Origin: ASIS', 'Insertion: Medial proximal tibia (pes anserinus)']

Synergistic Muscles

['TFL', 'Rectus femoris']

Joints

['Hip', 'Knee']

Primary Actions

['Hip flexion', 'Abduction', 'External rotation', 'Knee flexion']

Nerve & Spinal Segment

Femoral nerve

Lumbar plexus; L2–L3

Interesting

Longest muscle in the body. [Moore's]

Reversal of Action

Lift pelvis toward thigh during active hip motion

Common Dysfunctions

Anterior knee pain, tail-wag gait compensation

How to Stretch

Cross-legged seated lean forward.

Trigger Points

How to Strengthen

Diagonal leg lifts and seated hip flexion.

Concentric Action

Flex, abduct, and externally rotate hip

Applications:

Crosses 2 joints; often strained in sports requiring quick direction change

Eccentric Action

Control return from figure-4 position

Isotonic Action

Sliding heel to shin in figure-4 position

Related Conditions

['Patellar maltracking', 'Groin strain']

Isometric Action

Hold cross-legged position

Exercise Ideas

['Hacky sack kicks', 'Figure 4 squats', 'Hip rotation drills']

Related Blogs

Images

Videos

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