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Muscle Group 11

Muscles That Move the Thigh

QuestionAnswer
QUADRICEPS Rectus femoris Origin: Ilium (iliac spine) Insertion: Patella & tibia via the patellar ligament Action: Extends leg at knee & flexes thigh at hip
QUADRICEPS Vastus lateralis Origin: Femur (greater trochanter) Insertion: Patella & tibia via the patellar ligament Action: Extends leg at knee
QUADRICEPS Vastus medialis Origin: Femur (medial surface) Insertion: Patella & tibia via the patellar ligament Action: Extends leg at knee; Stabilizes patella
QUADRICEPS Vastus intermedius Origin: Femur (anterior & lateral surface) Insertion: Patella & tibia via the patellar ligament Action: Extends leg at knee
HAMSTRINGS Biceps femoris (2 heads) Origin: Long head - Ischium (ischial tuberosity); Short head - Femur (linea aspera) Insertion: Tibia (lateral condyle); Fibula (head) Action: Flexes & rotates leg laterally; Extends thigh
HAMSTRINGS Semitendinosus Origin: Ischium (ischial tuberosity) Insertion: Tibia (upper medial surface of shaft) Action: Flexes & rotates leg medially; Extends thigh
HAMSTRINGS Semimembranosus Origin: Ischium (ischial tuberosity) Insertion: Tibia (medial condyle) Action: Flexes & rotates leg medially; Extends thigh
Created by: michael.itonaga