vastus medialis
Post on 09-Jan-2016
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vastus medialis
• ORIGIN- intertronchanteric line of femur; medial aspect of linea aspera
• INSERTION- common quadriceps tendon into patella, tibial tuberosity via patellar ligament
• ACTION- extends the calf at the knee
• BLOOD- muscular branches of profunda femoris artery; saphenous branch of descending genicular artery
• NERVE- femoral nerve, (L2), L3, 4
vastus medialis
iliacus
• ORIGIN- inner surface of upper iliac fossa; anterior inferior iliac spine; anterior capsule of hip joint
• INSERTION- iliopsas tendon to the lesser trochanter of the femur; medial aspect of the linea aspera
• ACTION- powerfully flexes the thigh at the hip; external rotation of the femur
• BLOOD- iliolumbar artery; deep circumflex iliac artery
• NERVE- femoral nerve, L2, 3, 4
iliacus
psoas major
• ORIGIN- vertebral bodies of T12-L4 and the intervening intervertebral discs; transverse processes of L1-L4
• INSERTION- iliopsoas tendon to the lesser trochanter of the femur; medial aspect of the linea aspera
• ACTION- flexes the thigh at the hip; external rotation of the femur
• BLOOD- iliolumbar artery; lumbar artery; subcostal artery
• NERVE- ventral rami, L1, 2, 3, 4
psoas major
pectineus
• ORIGIN- pictineal line of the pubis; superior pubic ramus
• INSERTION- the pectineal line of the femur
• ACTION- flexes the thigh at the hip; adducts thigh at the hip; medially rotates thigh at the hip
• BLOOD- muscular branches of medial femoral circumflex artery
• NERVE- A: femoral nerve, L3, 4 or B: obturator nerve, L2, 3, 4 or A&B: femoral L3, 4 and accessory obturator L3, 4
pectineus
gastrocnemius
• ORIGIN- medial head: just above medial condyle of femur; lateral head: just above lateral condyle of femur
• INSERTION- calcaneus via lateral portion of calcaneal tendon
• ACTION- plantarflexes the foot at the ankle; flexes the calf at the knee; stablilizes ankle and knee when standing
• BLOOD- sural branches of popliteal artery; muscular branches of peroneal artery; posterior tibial artery
• NERVE- tibial nerve, S1, 2
gastrocnemius
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