Muscles of Anterior Thigh Acting at Knee Joint

What is the proximal attachment of the rectus femoris m.?

Anterior inferior iliac spine (AIIS) and ilium superior to acetabulum

What is the distal attachment of the rectus femoris m.?

Via common tendinous (quadriceps tendon) and independent attachments to base of patella; indirectly attaches to tibial tuberosity via patellar ligament

What is the innervation of the rectus femoris m.?

Femoral Nerve (L2, L3, L4)

What is the action of the rectus femoris m.?

Extends knee joint; also stabilizes hip joint and assists iliacus in flexion of hip joint

What is the proximal attachment of the vastus lateralis m.?

Greater trochanter and lateral lip of linea aspea of femur

What is the distal attachment of the vastus lateralis m.?

Via common tendinous (quadriceps tendon) and independent attachments to base of patella; indirectly attaches to tibial tuberosity via patellar ligament; tibia and patella via aponeurosis

What is the innervation of the vastus lateralis m.?

Femoral Nerve (L2, L3, L4)

What is the action of the vastus lateralis m.?

Extends knee joint

What is the proximal attachment of the vastus medialis m.?

Intertrochanteric line and medial lip of linea aspea of femur

What is the distal attachment of the vastus medialis m.?

Via common tendinous (quadriceps tendon) and independent attachments to base of patella; indirectly attaches to tibial tuberosity via patellar ligament; tibia and patella via aponeurosis

What is the innervation of the vastus medialis m.?

Femoral Nerve (L2, L3, L4)

What is the action of the vastus medialis m.?

Extends knee joint

What is the proximal attachment of the vastus intermedius m.?

Anterior and lateral surfaces of shaft of femur

What is the distal attachment of the vastus intermedius m.?

Via common tendinous (quadriceps tendon) and independent attachments to base of patella; indirectly attaches to tibial tuberosity via patellar ligament

What is the innervation of the vastus intermedius m.?

Femoral Nerve (L2, L3, L4)

What is the action of the vastus intermedius m.?

Extends knee joint