Anterior and Medial Thigh Flashcards
What are the muscles of the anterior thigh?
Pectineus
Iliopsoas
Sartorius
Quadriceps Femoris
What are the muscles of the medial thigh?
Adductor Longus/Brevis/Magnus
Gracilis
Pectineus
Obturator Externus
Which muscles make up quadriceps femoris?
Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius
Which nerve innervates muscles of the anterior thigh?
Femoral nerve
Where does iliopsoas insert?
Lesser trochanter of femur
What action does iliopsoas contribute to?
Flexion at hip
Where does sartorius originate?
ASIS
Where does sartorius insert?
Tibia: superior aspect of medial surface
Which actions does sartorius contribute to?
Flex, Abduct, and Laterally Rotate Thigh at Hip Joint
Flex at Knee
Which nerve innervates sartorius?
Femoral nerve
Where does rectus femoris originate?
AIIS
Where does rectus femoris insert?
Base of patella
Tibial tuberosity via Patellar ligament
Which actions does rectus femoris contribute to?
Flexion at hip
Extension of leg at knee
Where does vastus lateralis originate?
Greater trochanter
Lateral lip of linea aspera
Where does vastus lateralis insert?
Base of patella
Tibial tuberosity via patellar ligament
Where does vastus medialis originate?
Intertrochanteric line
Medial lip of linea aspera
Where does vastus medialis insert?
Base of patella
Tibial tuberosity via Patellar ligament
Which action do vastus lateralis and vastus medialis contribute to?
Extension of leg at knee
Where does vastus intermedius originate?
Anterior and lateral surfaces of femur
Where does vastus intermedius insert?
Base of Patella
Tibial tuberosity via patellar ligament
Which action does vastus intermedius contribute to?
Extension of leg at knee
Which 3 muscles insert at the superior aspect of medial surface of the tibia?
Sartorius
Semitendinosus
Gracilis
Where does the tensor of vastus intermedius insert?
Medial aspect of patellar base
for tracking of patella
Where is femoral nerve in relation to bony landmarks when it crosses under the inguinal ligament?
Halfway between AIIS and pubic bone
What are the 2 ‘fringe’ muscles of the medial thigh?
Pectineus
Adductor Magnus
Where does pectineus originate?
On pubic bone
Where does pectineus insert?
At pectineal line (inserts on posterior aspect of proximal femur)
Which actions does pectineus contribute to?
Adduction of thigh at hip
Flexion of thigh at hip
Medial rotation at hip
What nerves innervate pectineus?
Femoral nerve
Obturator nerve
Where do adductor longus and adductor brevis lie in relation to each other?
Adductor longus is superficial to adductor brevis
Where do adductor longus and brevis originate?
Pubic bone
Where do adductor longus and brevis insert?
Linea aspera of femur
What action do adductor longus and brevis contribute to?
Adduction of thigh
What nerve innervates adductor longus and brevis?
Obturator nerve
What are the 2 portions of adductor magnus?
Adductor portion
Hamstring portion
Where does the adductor portion of adductor magnus originate and insert?
Pubic Bone/Ramus of Ischium –> Linea aspera of femur
Which actions does the adductor portion of adductor magnus contribute to?
Adduction of thigh
Flexion of thigh
What is the adductor portion of adductor magnus innervated by?
Obturator nerve
Where does the hamstring portion of adductor magnus originate and insert?
Ischial tuberosity –> Adductor tubercle of femur
What actions does the hamstring portion of adductor magnus contribute to?
Adduction of thigh
Extension of thigh
What is the hamstring portion of adductor magnus innervated by?
Sciatic nerve (tibial division)
Where does gracilis originate?
Pubic bone
Where does gracilis insert?
Tibia: superior aspect of medial surface
Which actions does gracilis contribute to?
Adduction of thigh
Flexion at knee
Medial rotation of leg
Which nerve is gracilis innervated by?
Obturator nerve
Where does obturator externus originate?
Obturator Membrane
Margins of Obturator Foramen
Where does obturator externus insert?
Trochanteric fossa of femur
Which actions does obturator externus contribute to?
Lateral rotation at hip joint
Stabilization of hip joint
What is obturator externus innervated by?
Obturator nerve
What are the two branches of the obturator nerve?
Posterior branch and anterior branch
Which muscle do the branches of the obturator nerve go around?
Adductor brevis
What are the boundaries of the femoral triangle?
Inguinal ligament
Sartorius
Adductor Longus
What is contained in the femoral triangle?
Femoral nerve, artery, and vein
What muscles make up the floor of the femoral triangle?
Iliopsoas
Pectineus
