Anterior Thigh Flashcards
What are the two muscle categories in the anterior thigh?
Hip flexors (5) Knee extensors/Quadriceps (4)
What are the 5 hip flexors of the anterior thigh?
Psoas major, Psoas minor, iliacus, pectineus, sartorius
What is the origin and insertion of the Psoas major muscle?
Origin T12-L5 transverse processes
Insertion Lesser trochanter of femur
What is the origin and insertion of the Psoas minor muscle?
Origin T12-L1 vertebral bodies
Insertion pectineal line and iliopubic eminence
The Psoas muscles are innervated…
Directly by ventral rami L1-L3
What is the origin and insertion of the iliacus muscle?
Origin iliac crest, iliac fossa and sacrum
Insertion lesser trochanter of femur
What is the innervation of the iliacus, pectineus and sartorius muscles?
Femoral nerve
What is the origin and insertion of the pectineus muscle?
Origin pubis
Insertion pectineal line of femur
What is the origin and insertion of the sartorius muscle?
Origin ASIS
Insertion pes anserinus (medial tibia)
The pes anserinus receives 3 tendons from which 3 muscles? State the compartment they derive from and their innervation.
Sartorius - anterior thigh - femoral nerve
Gracilis - medial thigh - obturator nerve
Semitendinosus- posterior thigh - sciatic (tibial) nerve
Name the 4 knee extensors
Quadriceps: Rectus femoris, vastus lateralis, vastus intermedius and vastus medialis
What is the innervation of the quadriceps muscles?
Femoral nerve (L2-L4)
What are the common insertions of the quadriceps muscles?
The patella and tibial tuberosity (via the quadriceps tendon and patella tendon respectively)
What is the origin of the rectus femoris muscle?
AIIS
What is the origin of the vastus lateralis muscle?
Greater trochanter of femur, linea aspera and gluteal tuberosity of femur
