Anterior thigh Flashcards
(14 cards)
Muscles of anterior thigh
Iliacus Rectus femoris Vastus lateralis Vastus intermedius Vastus medialis Sartorius Pectineus
Most functions of anterior thigh muscles
Extend knee
flex hip
Sartorius
Origin: Anterior superior iliac spine
Inserts: pes anserinus (medial tibia)
Function: UNUSUAL knee flexor, hip: flexor, lateral rotator, weak abductor
Innervation: Femoral nerve `
Common innervation of anterior muscles:
Femoral nerve
Pectineus
Origin: pectineal line on anterior pelvis (pubis)
Insert: pectinal line of femur (inferior to lesser trochanter)
Function: Hip flexor, adductor
Innervation: femoral nerve with some obturator
Iliacus
Origin: Iliac fossa
Insert: lesser trochanter
Function: flexor of thigh at hip
Innervation: femoral nerve
Quadricep femoris muscles
4 rectus femoris vastus medialis vastus intermedius vastus lateralis Extend leg at knee
Vastus Lateralis
Origin: Greater trochanter
Insertion: patella via quadriceps tendon then to tibial tuberosity (patellar ligament)
Action: Extends knee, stabilises patella
Innervation: femoral nerve
Vastus medialis specific function
pulls patella medially to stop it dislocating laterally
stops lateral dislocation of patellofemoral joint
Rectus femoris
Origin: Anterior inferior iliac spine
Insert: Patella (via quadriceps tendon)
Function: flex thigh at hip, extend knee
Innervation; femoral nerve
ONLY QUAD MUSCLE TO CROSS HIP AND KNEE
Vastus Intermedius
Origin: Anterior and lateral femoral shaft
Insertion: patella (via quadriceps ligament)
Action: Extend the knee joint, stabilise patella
Innervation: femoral nerve
Vastus Medialis
Origin: Intertrochanteric line. Linea aspera
Insertion: patella (via quadriceps tendon)
Actions: Extend the knee joint and stabilise patella
Innervation: Femoral nerve
Iliopsoas
Psoas major and iliacus
Psoas major
Origin: lumbar vertebrae
Insert: Lesser trochanter
Action: Flexes thigh at hip
Innervation: Anterior rami (L1-3)
