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Anatomy
Anatomy
Sartorius
Evidence-grounded — sourced from Fysiqal's fitness knowledge graph· 1 min read
hiphip-flexorsartoriustwo-joint-musclelongest-muscle
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In one line
The longest muscle in the body; a 2-joint hip flexor and adductor that also flexes and laterally rotates the knee.
Detail
The sartorius is the longest muscle of the body and a 2-joint muscle. Its name comes from the Latin "sartor," meaning "tailor." It is a hip flexor and adductor as well as a knee flexor and lateral rotator. It is given as an example of a fusiform muscle, which produces a small force of contraction because of its small cross-section but allows for speed of contraction. (Sartorius and gracilis are also noted as weak knee flexors.)
Key facts
- Longest muscle in the body; 2-joint muscle.
- "Sartorius" = Latin "sartor" = tailor.
- Functions: hip flexor and adductor; knee flexor and lateral rotator.
- A fusiform muscle (small cross-section, small force, speed of contraction).
Connections
- hip-flexors — a primary hip flexor.
- muscle-fiber-arrangement — example of a fusiform muscle.
SourceReference manual
p.64p.256p.720
Cited authorities in source: Yessis (1992); Ellison (1991).
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.
Explore related topics
Atlas Connections
Hamstrings
Three 2-joint muscles — biceps femoris, semitendinosus, semimembranosus — that flex the knee (primary) and extend the hip (secondary); knee-flexion ROM 125°.Hip Flexors
The 4 major hip flexors — iliopsoas, rectus femoris, tensor fascia lata, sartorius — plus secondary flexors.Muscle Fiber Arrangements (Penniform vs. Fusiform)
The two major fiber arrangements — penniform (greater cross-section, more force) and fusiform (parallel fibers, speed but less force).