Anatomy Unit 1: Newest Muscles

• Popliteus origin


  lateral femoral condyle, lateral meniscus
• popliteus insertion


  posterior tibia
• popliteus nerve


  tibial nerve
• popliteus artery 


  popliteal artery
• popliteus actions


  unlocks knee extension, slight external rotation (CKC), internal rotation (OKC)
• iliopsoas orgin


  Iliac Fossa; L1-L5, T12-L4
• iliopsoas insertion


  Lesser Trochanter
• iliopsoas nerve


  direct branches of lumbar plexus, L1-L3
• iliopsoas artery 


  ilio-lumbar artery
• iliopsoas actions


  hip flexion, external rotation, lateral trunk flexion
• semimembranosus origin


  ischial tuberosity
• semimembranosus insertion


  medial condyle of the tibia, oblique popliteal ligament
• semimembranosus nerve


  tibial division of sciatic nerve
• semimembranosus artery


  perforating branches of the deep femoral artery
• semimembranosus actions


  knee flexion, hip extension, internal rotation
• quadratus femoris origin


  ischial tuberosity (lateral)
• quadratus femoris insertion


  intertrochanteric crest of the femur
• quadratus femoris nerve


  nerve to quadratus femoris
• quadratus femoris artery


  medial circumflex artery
• quadratus femoris actions


  external rotation of the hip
• superior/inferior gemellus origin


  superior: ischial spine

  inferior: ischial tuberosity
• superior/inferior gemellus insertion


  superior: greater trochanter of the femur

  inferior: greater trochanter of the femur
• superior/inferior gemellus nerve


  superior: nerve to obturator internus

  inferior: nerve to quadratus femoris
• superior/inferior gemellus artery


  superior: inferior gluteal nerve, internal pudendal artery

  inferior: medial femoral circumflex artery
• superior/inferior gemellus actions


  external rotation of the hip, hip extension
• obturator internus origin


  internal surface of the obturator membrane
• obturator internus insertion


  greater trochanter of the femur
• obturator internus nerve


  nerve to obturator internus
• obturator internus artery


  obturator artery, internal pudendal artery
• obturator internus actions


  external rotation of the hip, hip extension
• biceps femoris (long/short) origin


  long: ischial tuberosity

  short: middle 1/3 of the femur, lateral aspect of the linea aspera
• biceps femoris (long/short) insertion


  both: head of the fibula
• biceps femoris (long/short) nerve

  long: tibial division of the sciatic nerve

  short: common fibular nerve
• biceps femoris (long/short) artery

  perforating branches of the deep femoral artery
• biceps femoris (long/short) actions

  hip extension, knee flexion, external rotation
• vastus medialis origin


  intertrochanteric line of the femur, medial aspect of line aspera
• vastus medialis insertion


  tibial tuberosity via patellar ligament
• vastus medialis nerve


  femoral nerve
• vastus medialis blood supply

  femoral artery, deep femoral artery
• vastus medialis actions


  knee extension