Podcast
Questions and Answers
What is the main function of the quadriceps femoris group of muscles?
What is the main function of the quadriceps femoris group of muscles?
- Flex the thigh at the hip
- Flex the leg at the knee joint
- Extend the leg at the knee joint and flex the thigh at the hip (correct)
- Extend the thigh at the hip
Which muscle is known as the 'tailor muscle'?
Which muscle is known as the 'tailor muscle'?
- Vastus medialis
- Semimembranosus
- Sartorius (correct)
- Rectus femoris
Where does the Vastus lateralis muscle originate from?
Where does the Vastus lateralis muscle originate from?
- Anterior inferior iliac spine
- Greater trochanter & line aspera of femur (correct)
- Anterior & lateral surface of the body of the femur
- Ischial tuberosity
Which muscle group commonly flexes the leg at the knee joint and extends the thigh at the hip?
Which muscle group commonly flexes the leg at the knee joint and extends the thigh at the hip?
What is the insertion point for Semitendinosus muscle?
What is the insertion point for Semitendinosus muscle?
Which muscle flexes the knee when standing up, taking a step, or kicking a ball?
Which muscle flexes the knee when standing up, taking a step, or kicking a ball?
Which muscle is the great extensor muscle of the leg?
Which muscle is the great extensor muscle of the leg?
What is the insertion point for Biceps femoris muscle?
What is the insertion point for Biceps femoris muscle?
Which muscle is responsible for helping us sit cross-legged?
Which muscle is responsible for helping us sit cross-legged?
What is the origin point for Semimembranosus muscle?
What is the origin point for Semimembranosus muscle?
Which muscle group flexes the thigh at the hip joint?
Which muscle group flexes the thigh at the hip joint?
Where does Vastus lateralis insert?
Where does Vastus lateralis insert?
Which muscle is the longest in the body?
Which muscle is the longest in the body?
What is the function of the quadriceps femoris group of muscles?
What is the function of the quadriceps femoris group of muscles?
Which muscle acts with the iliopsoas to flex the hip while the leg is off the ground?
Which muscle acts with the iliopsoas to flex the hip while the leg is off the ground?
Where does Semitendinosus muscle insert?
Where does Semitendinosus muscle insert?
Which muscle group commonly flexes the thigh at the hip joint and extends the leg at the knee joint?
Which muscle group commonly flexes the thigh at the hip joint and extends the leg at the knee joint?
What is the origin point for Biceps femoris muscle?
What is the origin point for Biceps femoris muscle?
Study Notes
Anterior Extensor Muscles (Quadriceps Femoris group)
- Rectus femoris is a superficial muscle that originates from the anterior inferior iliac spine and inserts into the tibial tuberosity.
- Vastus lateralis originates from the greater trochanter and linea aspera of the femur and inserts into the tibial tuberosity.
- Vastus medialis originates from the linea aspera of the femur and inserts into the tibial tuberosity.
- Vastus intermedius originates from the anterior and lateral surface of the body of the femur and inserts into the tibial tuberosity.
- All four muscles extend the leg at the knee joint and flex the thigh at the hip.
- The quadriceps femoris is the great extensor muscle of the leg, extending the knee when standing up, taking a step, or kicking a ball.
- It is important in running, as it acts with the iliopsoas to flex the hip while the leg is off the ground.
Sartorius Muscle
- Nicknamed the tailor muscle because it helps us sit cross-legged.
- It is the longest muscle in the body.
Posterior Flexor Muscles (Hamstringis Femoris group)
- Biceps femoris has a long head originating from the ischial tuberosity and a short head originating from the linea aspera of the femur, and inserts into the head and lateral condyle of the fibula.
- Semimembranosus originates from the ischial tuberosity and inserts into the medial condyle of the tibia.
- Semitendinosus originates from the ischial tuberosity and inserts into the shaft of the tibia.
- The posterior group of muscles commonly flexes the leg at the knee joint and extends the thigh at the hip.
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Description
Test your knowledge on the anatomy of the quadriceps femoris group, including rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. Learn about the origin, insertion, and functions of these muscles in the leg and thigh.
