The sartorius is the muscle of the anterior compartment of the thigh and is the longest muscle in the body.
ORIGIN: anterior superior iliac spine(ASIS)
INSERTION: upper part of medial surface of tibia.
MNEMONIC: A SIS sits on the table(tibia).
NERVE SUPPLY: Femoral nerve.
ACTIONS: Abductor, lateral rotator of thigh and flexor of leg.
The best way to remember the action is to imagine a person sitting in the palthi posture as shown in the image below.
-Ariba Ali, Anuja Mandavkar