Muscles In The Anterior Compartment Of The Thigh Flashcards
What nerve innervates the anterior muscles of the thigh? What is its nerve root?
Femoral nerve (L2-L4)
What two muscles make up the iliopsoas?
Psoas major and iliacus
What is are the attachments of the iliopsoas muscle of the thigh?
Psoas muscle- originates from the lumbar vertebrae
Iliacus - originates form the iliac fossa of the pelvis
Insert together onto the lesser trochanter of the femur
What is the action of the iliopsoas muscle of the thigh?
Flexes the lower limb at the hip and assists in lateral rotation at the hip
How is the iliopsoas muscle of the thigh innervated?
Psoas major- anterior rami of L1-3
Iliacus- femoral nerve
What 4 muscles make up the quadriceps femoris?
Vastus lateralis
Vastus intermedius
Vastus medialis
Rectus femoris
What is the main function of the quadriceps femoris?
Extension of the knee
How is the quadricep femoris attached to the tibia indirectly?
All the muscles unite proximal to the knee and distally attach to the patella via the Patella tendon. The patella attaches to the tibia by the patella ligament.
What is the attachment of the vastus lateralis of the quadricep femoris in the thigh?
Originates from the greater trochanter and the lateral lip of linea aspera
Attached to the patella via the patella tendon
What is the attachment of the vastus intermedius of the quadriceps femoris of the thigh?
Originates from the anterior and lateral surfaces of the femoral shaft
Attached to the patella via the patella tendon
What is the attachment for the vastus medialis of the quadriceps femoris of the thigh?
Originates from the intertrochanteric line and medial lip of the linea aspera
Attached to the patella via the patella tendon
What is the attachment of the rectus femoris of the quadriceps femoris of the thigh?
Originates from the ilium (just superior to the acetabulum)
Runs straight down leg and attaches to the patella by the quadriceps femoris tendon
What is the action of the vastus lateralis of the quadriceps femoris of the thigh?
Extends the knee joint and stabilised the patella
What is the action of the vastus intermedius of the quadriceps femoris of the thigh?
Extends the knee joint and stabilised the patella
What is the action of the vastus medialis of the quadriceps femoris of the thigh? What makes it so good at its function?
Extends the knee joint and stabilised the patella, particularly due to its horizontal fibres at the distal end