Anterior and Medial Thigh Flashcards
What is the function of the anterior compartment of the thigh?
- Flex hip
- Extend knee
What is the function of the medial compartment of the thigh?
Adduct hip
What is the function of the posterior compartment of the thigh?
- Extend hip
- Flex knee
Identify the features of the femur.
What is this muscle?
Iliacus
What is the origin of the iliacus?
- Iliac crest
- Iliac fossa
- Ala of sacrum
- Anterior sacroiliac ligament
What is the insertion of the iliacus?
- Psoas tendon
- Lesser trochanter of femur
What innervates the iliacus?
Femoral nerve (L2,3)
What is the function of the iliacus?
Hip flexion
What is this muscle?
Psoas major
What is the origin of the psoas major?
- T12-L5 IV discs
- Lumbar transverse processes
What is the insertion of the psoas major?
Lesser trochanter of femur
What innervates the psoas major?
Anterior rami L1-3
What is the function of the psoas major?
Hip flexion
What is this muscle?
Pectineus
What is the origin of the pectineus?
Superior ramus of pubis
What is the insertion of the pectineus?
Pectineal line of femur
What is the innervation of the pectineus?
Femoral nerve (L2,3)
What is the function of the pectineus?
- Adduct and flex hip
- Assist with medial rotation
What is this muscle?
Sartorius
What is the origin of the sartorius
Anterior superior iliac spine
What is the insertion of the sartorius?
Superior part of medial surface of tibia
What innervates the sartorius?
Femoral nerve (L2,3)
What is the function of sartorius?
- Flex, abduct, and laterally rotate hip
- Flex knee
What are these muscles?
What is the common insertion of the quadriceps?
- Quadriceps tendon
- Tibial tuberosity via patellar ligament
What is the origin of the rectus femoris?
- AIIS
- Ilium above acetabulum
What is the origin of the vastus lateralis?
- Greater trochanter of femur
- Lateral linea aspera
What is the origin of the vastus medialis?
- Intertrochanteric line
- Medial linea aspera
What is the origin of the vastus intermedius?
Anterior and lateral shaft of femur
What is the innervation of the quadriceps muscles?
Femoral nerve (L2,3,4)
What is the function of the quadriceps?
- Knee extension
- Rectus femoris flexes hip
What is this muscle?
Gracilis
What is the origin of the gracilis?
Body and inferior ramus of pubis
What is the insertion of the gracilis?
Superior medial surface of tibia
What is the innervation of the gracilis?
Obturator nerve (L2,3)
What is the function of the gracilis?
- Adducts hip
- Flexes knee
What is this muscle?
Adductor longus
What is the origin of the adductor longus?
Body of pubis
What is the insertion of the adductor longus?
Middle 1/3 linea aspera
What is the innervation of the adductor longus?
Obturator nerve (L2-4)
What is the function of the adductor longus?
Adducts thigh
What is this muscle?
Adductor brevis
What is the origin of the adductor brevis
Body and inferior ramus of pubis
What is the insertion of the adductor brevis?
- Pectineal line
- Proximal linea aspera
What innervates the adductor brevis?
Obturator nerve (L2-4)
What is the function of the adductor brevis?
Adducts thigh
What is this muscle?
Adductor magnus
What is the origin of the adductor magnus?
- Ischiopubic ramus
- Ischial tuberosity
What is the insertion of the adductor magnus?
- Linea aspera
- Medial supracondylar line
- Adductor tubercle
What is the innervation of the adductor magnus?
Obturator nerve
(hamstring part = tibial division of sciatic nerve)
What is the function of adductor magnus
Adducts thigh
What is this muscle?
Obturator externus
What is the origin of the obturator externus?
- Margin of obturator foramen
- Obturator membrane
What is the insertion of the obturator externus?
Trochanteric fossa
What is the innervation of the obturator externus?
Obturator nerve (L3,4)
What is the function of the obturator externus?
Laterally rotates thigh
What are the boundaries of the adductor canal?
- Sartorius
- Vastus medialis
- Adductor longus
What passes through the adductor hiatus to reach the popliteal fossa?
Femoral vessels
What passes between the sartorius and gracilis?
Saphenous nerve