ATH301_10

Card Set Information

Author:
itzlinds
ID:
248879
Filename:
ATH301_10
Updated:
2013-11-24 21:31:42
Tags:
muscles acting knee
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Description:
muscles acting on the knee
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  1. biceps femoris:

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee flexion
    • external tibial rotation
    • long head: hip extension, hip external rotation

    • origin
    • long head: iscial tuberosity, sacrotuberous ligament
    • short head: lateral lip of the linea aspera, upper 2/3rds of the supracondylar line

    • insertion
    • lateral fibular head
    • lateral tibial condyle

    • innervation
    • long head: tibial
    • short head: common peroneal

    • root
    • long head: S1, S2, S3
    • short head: L5, S1, S2
  2. gastrocnemius

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • assists in knee flexion
    • ankle plantarflexion

    • origin
    • medial head: posterior surface of the medial femoral condyle; adjacent portion of the femur and knee capsule
    • lateral head: posterior surface of the lateral femoral condyle; adjacent portion of the femur and knee capsule

    • insertion
    • to the calcaneus via the achilles tendon

    • innervation
    • tibial

    • root
    • S1
    • S2
  3. gracillis

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee flexion
    • internal tibial rotation
    • hip adduction

    • origin
    • symphysis pubis
    • inferior ramus of the pubic bone

    • insertion
    • proximal portion of the anteor-medial tibial flare

    • innervation
    • obturator (posterior)

    • root
    • L3, L4
  4. popliteus

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • open chain: internal tibial rotation, knee flexion
    • closed chain: external femoral rotation, knee flexion

    • origin
    • lateral femoral condyle
    • oblique popliteal ligament

    • insertion
    • posterior tibia superior to the soleal line
    • fascia covering the soleus

    • innervation
    • tibial

    • root
    • L4, L5, S1
  5. rectus femoris

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee extension
    • hip flexion

    • origin
    • anterior inferior iliac spine
    • groove located superior to the acetabulum

    • insertion
    • to the tibial tubercle via the patella and patellar ligament

    • innervation
    • femoral

    • root
    • L2, L3, L4
  6. sartorius

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee flexion
    • internal tibial rotation
    • hip flexion
    • hip abduction
    • hip external rotation

    • origin
    • anterior superior iliac spine

    • insertion
    • proximal protion of the antero-medial tibial flare

    • innervation
    • femoral

    • root
    • L2, L3
  7. semimembranosus

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee flexion
    • internal tibial rotation
    • hip extension
    • hip internal rotation

    • origin
    • ischial tuberosity

    • insertion
    • posteromedial portion of the tibia's medial condyle

    • innervation
    • tibial

    • root
    • L5, S1
  8. semitendinosus

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee flexion
    • internal tibial rotation
    • hip extension
    • hip internal rotation

    • origin
    • ischial tuberosity

    • insertion
    • medial portion of the tibial flare

    • innervation
    • tibial

    • root
    • L5, S1, S2
  9. vastus intermedius

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee extension

    • origin
    • anterolateral portion of the upper 2/3rds of the femur
    • lower one half of the linea aspera

    • insertion
    • to the tibial tubercle via the patella and patellar ligament

    • innveration
    • femoral

    • root
    • L2, L3, L4
  10. vastus lateralis

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee extension

    • origin
    • proximal interochanteric line
    • greater trochanter
    • gluteal tuberosity
    • upper 1/2 of the linea aspera

    • insertion
    • to the tibial tubercle via the patella and the patellar ligament

    • innervation
    • femoral

    • root
    • L2, L3, L4
  11. vastus medialis

    action:
    origin:
    insertion:
    innervation:
    root:
    • action
    • knee extension
    • oblique portion: patellar stabilization

    • origin
    • longus portion: distal 1/2 of the intertrochanteric line; medial protion of the liean aspera
    • oblique portion: tendons from adductor longus and adductor magnus

    • insertion
    • to the tibial tubercle via the patella and the patellar ligament

    • innervation
    • femoral

    • root
    • L2, L3, L4

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