MUSCLES OF LOWER EXTREMITY Flashcards
What are the 3 compartments of the thigh
Anterior (Hip flexors / knee extensors), Medial (Hip adductors), Posterior (Hip extensors / knee flexors)
Which muscles make up the anterior compartment of the thigh?
Iliopsoas, Sartorius, Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius
Which muscles make up the medial compartment of the thigh?
Pectineus, Gracilis, Adductor Longus, Adductor Brevis, Adductor Magnus (Adductor portion), Adductor Magnus (Hamstring portion)
Which muscles make up the posterior compartment of the thigh?
Semimembranosus, Semitendinosus, Biceps Femoris (Long Head and Short Head)
Where does the iliopsoas originate and insert? Action? Innervation? Blood Supply?
Origin: Iliac fossa and transverse processes of lumbar spine
Insertion: Lesser trochanter
Action: Hip flexion
Innervation: Femoral nerve (iliacus), Anterior rami L1-L3 (psoas)
Blood Supply: Medial femoral circumflex artery (iliacus), Iliolumbar artery (psoas)
Where does the sartorius originate and insert? Action? Innervation? Blood Supply?
Origin: ASIS
Insertion: Anterior/medial surface of tibia (pes anserinus)
Action: Hip flexion, abduction, external rotation, knee flexion
Innervation: Femoral nerve
Blood Supply: Femoral artery
Where does the rectus femoris originate and insert? Action? Innervation? Blood Supply?
Origin: AIIS
Insertion: Tibial tuberosity
Action: Knee extension
Innervation: Femoral artery
Blood Supply: Femoral nerve
Where does the vastus lateralis originate and insert? Action? Innervation? Blood Supply?
Origin: Intertrochanteric line, lateral lip of linea aspera
Insertion: Tibial tuberosity
Action: Knee extension
Innervation: Femoral nerve
Blood Supply: Femoral artery
Where does the vastus medialis originate and insert? Action? Innervation? Blood Supply?
Origin: Intertrochanteric line, Medial lip of linea aspera
Insertion: Tibial tuberosity
Action: Knee extension
Innervation: Femoral nerve
Blood Supply: Femoral artery
Where does the vastus intermedius originate and insert? Action? Innervation? Blood Supply?
Origin: Anterior/lateral surface of the femur
Insertion: Tibial tuberosity
Action: Knee extension
Innervation: Femoral nerve
Blood Supply: Femoral artery
Where does the pectineus originate and insert? Action? Innervation? Blood supply?
Origin: Pectineal line of superior pubic ramus (superior to obturator foramen)
Insertion: Pectineal line of femur (inferior to lesser trochanter)
Action: Adduction and Flexion
Innervation: Femoral nerve
Blood Supply: Obturator artery
Where does the adductor longus originate and insert? Action? Innervation? Blood Supply?
Origin: Superior pubic ramus
Insertion: Inferior linea aspera of femur
Action: Adduction and flexion
Innervation: Obturator nerve
Blood supply: Deep femoral artery
Where does the adductor brevis originate and insert? Action? Innervation? Blood Supply?
Origin: Inferior pubic ramus
Insertion: Superior linea aspera of femur
Action: Adduction and flexion
Innervation: Obturator nerve
Blood supply: Deep femoral artery
Where does the gracilis originate and insert? Action? Innervation? Blood Supply?
Origin: Pubic symphysis
Insertion: Pes anserinus
Action: Hip adduction and knee flexion
Innervation: Obturator nerve
Blood Supply: Obturator artery
Where do the two parts of the adductor magnus originate and insert?
Origin:
- Inferior pubic ramus (adductor portion)
- Ischial tuberosity (hamstring portion)
Insertion:
- Linea aspera (adductor portion)
- Adductor tubercle (hamstring portion)
Action:
- Adduction and Flexion (adductor portion)
- Adduction and Extension (hamstring portion)
Innervation:
- Obturator nerve (adductor portion)
- Sciatic nerve (hamstring portion)
Blood Supply:
- Deep femoral artery (both adductor and hamstring)
