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The semitendinosusExtensor / Flexor Runs from back of your thigh to inside of knee; extends hip and bends the knee. muscle, often confused with the semimembranosusExtensor / Flexor Deep to semitendinosus; extends hip and flexes knee on the inner thigh muscle, acts in knee flexion and hip extension.
Origin
The semitendinosus muscle originates from the ischial tuberosityRough, thick projection that bears body weight when sitting; major hamstring attachment., a bony prominence in the pelvis. This point of origin is critical to the muscle’s functionality.
Insertion
The muscle inserts onto the proximalCloser to the point of attachment or origin. part of the tibiaShinbone; large, weight-bearing medial bone of the lower leg.. It specifically attaches to the upper part of the medialToward the midline of the body surface of the tibia.
Actions
Knee Flexion
Hip Extension
Medial Rotation of the Leg
Interactive Materials
🩻 Label or Draw on the Thigh
Use the tools below to draw or add text labels directly on the pelvic girdle image. Choose a color, undo/redo strokes, clear your work, or save it when done.
Identify More Muscles
Link to more Muscle Identification
Upper Arm Muscles
Forearm Muscles
Calf Muscles
Anterior Thigh Muscles
Posterior Thigh Muscles
Knee Structures
Chest Muscles
Back Muscles
Abdominal Muscles
Neck Muscles
Head Muscles
List of terms
- semitendinosus
- semimembranosus
- ischial tuberosity
- proximal
- tibia
- medial