Lower limb- muscle Flashcards
What is the action of the rectus femoris muscle?
• Knee extension
• Hip flexion
The rectus femoris is one of the quadriceps muscles.
Where does the rectus femoris muscle originate?
Anterior inferior iliac spine
This is the bony prominence located at the front of the pelvis.
Where does the rectus femoris muscle insert?
Superior aspect of patella and patellar tendon to tibial tuberosity
This insertion is crucial for its function in knee extension.
What is the action of the vastus lateralis muscle?
Knee extension
The vastus lateralis is part of the quadriceps group.
Where does the vastus lateralis muscle originate?
• Anterior and inferior borders of greater trochanter
• Gluteal tuberosity
• Linea aspera of femur
These origins provide a strong base for knee extension.
Where does the vastus lateralis muscle insert?
Lateral border of patella, patellar tendon to tibial tuberosity
This insertion aids in knee stabilization.
What is the action of the vastus medialis muscle?
Knee extension
The vastus medialis is also part of the quadriceps group.
Where does the vastus medialis muscle originate?
Linea aspera of femur (femoral shaft)
The origin is crucial for its function in stabilizing the patella.
Where does the vastus medialis muscle insert?
Medial border of patella, patellar tendon to tibial tuberosity
This insertion supports knee extension and stabilization.
What are the hamstrings comprised of?
• Biceps femoris
• Semitendinosus
• Semimembranosus
These muscles are located on the posterior side of the thigh.
What is the primary action of the hamstrings?
• Flex the knee joint
• Extend the hip joint
These actions are essential for movements like walking and running.
What is the action of the biceps femoris muscle?
• Flexes knee
• Extends hip
• Leg lateral rotation
The biceps femoris has two heads contributing to its function.
Where does the biceps femoris muscle originate?
• Long head - ischial tuberosity
• Short head - lower half of linea aspera of the femur
The two heads provide strength and flexibility.
Where does the biceps femoris muscle insert?
Head of fibula
This insertion allows for effective knee flexion.
What is the action of the semitendinosus muscle?
• Flexes knee
• Extends hip
• Leg medial rotation
The semitendinosus is important for stabilizing the knee.
Where does the semitendinosus muscle originate?
Ischial tuberosity common with biceps femoris
This shared origin contributes to the hamstring’s overall function.
Where does the semitendinosus muscle insert?
Medial aspect of the tibia
Its insertion aids in knee flexion and medial rotation.
What is the action of the semimembranosus muscle?
• Flexes knee
• Extends hip
• Leg medial rotation
The semimembranosus is deep to the semitendinosus.
Where does the semimembranosus muscle originate?
Ischial tuberosity deep to semitendinosus
This location helps in its function and muscle arrangement.
Where does the semimembranosus muscle insert?
Medial tibial of condyle
This insertion plays a role in knee flexion and stability.
