Knee Muscles and Their Functions

The video tutorial covers the muscles involved in moving the knee joint, focusing on flexion and extension. It details the quadriceps as knee extenders, including vastus lateralis, rectus femoris, vastus medialis, and vastus intermedius. The hamstrings, including biceps femoris and semitendinosus, are introduced as knee flexors. Additional muscles like Sartorius and gracilis are also discussed for their role in knee flexion. The tutorial concludes with a summary and a preview of lower limb muscles.

What are the primary actions discussed for the knee joint?

• Flexion and extension

• Abduction and adduction

• Circumduction and rotation

• Flexion and rotation

Which muscle group is responsible for extending the knee?

• Hamstrings

• Calf muscles

• Adductors

• Quadriceps

How many muscles make up the quadriceps group?

• Five

• Four

• Six

• Three

Which quadriceps muscle crosses both the hip and knee joints?

• Vastus lateralis

• Vastus medialis

• Rectus femoris

• Vastus intermedius

Where do all the quadriceps muscles insert?

• On the fibula

• On the femur

• On the tibial tuberosity

• On the patella

Which muscle group is primarily responsible for knee flexion?

• Hamstrings

• Adductors

• Calf muscles

• Quadriceps

What additional action do the hamstring muscles perform besides knee flexion?

• Hip flexion

• Ankle dorsiflexion

• Hip extension

• Ankle plantarflexion

Which muscle is known as the 'BFF' of the hamstrings?

• Biceps femoris

• Semitendinosus

• Semimembranosus

• Gracilis

Which muscle, besides the hamstrings, also contributes to knee flexion?

• Rectus femoris

• Vastus medialis

• Vastus lateralis

• Sartorius

Which adductor muscle also assists in knee flexion?

• Gracilis

• Adductor brevis

• Pectineus

• Adductor longus