Knee Flashcards
Where does the abdominal aorta bifurcate?
L3/L4
What is the path of the sciatic nerve?
-comes underneath piriformis and has two branches: tibial nerve and common peroneal nerve
What are the boundaries of the femoral triangle?
- inguinal ligament
- sartorius muscle
- adductor longu muscle
What is the adductor canal?
tunnel in middle third of thigh from apex of femoral triangle to opening in adductor magnus
What is in the femoral triangle?
femoral nerve femoral artery femoral vein lymphatics NAVL
Femoral nerve:
L2-L4
anterior cutaneous nerve branches
motor nerves to muscles of anterior compartment
saphenous nerve
Saphenous nerve is
medial cutaneous nerve
Nerves of thigh
- obturator (L2-L4)
- sciatic (L4-S3)
- femoral (L2-L4)
Obturator nerve (L2-L4) posterior branch
- obturator branch
- adductor brevis
- adductor portion of adductor magnus
Obturator nerve (L2-L4) anterior branch
- adductor longus
- gracilus
- adductor brevis
- cutaneous branches to skin on medial thigh
Sciatic nerve branches
tibial nerve
common fibular nerve
Tibial nerve
biceps femoris (long head)
- semitendinosus
- semimembranosus
Common fibular nerve
-biceps femoris (short head)
Pectineus orgin
pecten pubis and pectineal surface of pubis
Pectineus insertion
pectineal line of femur
Pectineus action
adducts the thigh and flexes the hip joint
if top muscle is tight=lateral tilt
Pectineus innervation
femoral but may receive innervation from obturator nerve
Adductor Brevis origin
Anterior surface of inferior pubic ramus, inferior to origin of adductor longus
Adductor Brevis insertion
Pectineal line and superior part of medial lip of linea aspera
Adductor brevis action
Adducts and flexes the thigh, and helps to laterally rotate the thigh
Adductor brevis innervation
Anterior or posterior division of obturator nerve (L2, L3, L4)
Adductor Longus origin
Anterior surface of body of pubis, just lateral to pubic symphysis
Adductor Longus Insertion
Middle third of linea aspera, between the more medial adductor magnus and brevis insertions and the more lateral origin of the vastus medialis
Adductor longus action
Adducts and flexes the thigh, and helps to laterally rotate the hip joint
Adductor longus innervation
anterior division of obturator nerve (L2,L3,L4)
Adductor magnus origin
Inferior pubic ramus, ischial ramus, and inferolateral area of ischial tuberosity
Adductor magnus insertion
Gluteal tuberosity of femur, medial lip of linea aspera, medial supracondylar ridge, and adductor tubercle
Adductor magnus action
Powerful thigh adductor; superior horizontal fibers also help flex the thigh, while vertical fibers help extend the thigh
Adductor magnus innervation
Posterior division of obturator nerve innervates most of the adductor magnus; vertical or hamstring portion innervated by tibial nerve (L2, L3, L4
What leaves through the adductor hiatus?
femoral nerve and femoral artery
When the femoral vessels enter ______, they are called ______.
popliteal fossa, poplital vessels
Gracilis origin
Inferior margin of pubic symphysis, inferior ramus of pubis, and adjacent ramus of ischium
Gracilis insertion
Medial surface of tibial shaft, just posterior to sartorius
Gracilis action
Flexes the knee, adducts the thigh, and helps to medially rotate the tibia on the femur
Gracilis innervation
anterior division of obturator nerve
Sartorius origin
anterior superior iliac spine
Sartorius insertion
superior aspect of the medial surface of the tibial shaft near the tibial tuberosity
Sartorius action
flexes and laterally rotates the hip joint and flexes the knee
Sartorius innervation
femoral nerve (L2,L3,L4)
Tensor Fascia Lata origin
anterior superior iliac spine, outer lip of anterior iliac crest and fascia lata
Tensor Fascia Lata insertion
iliotibial band
Tensor Fascia Lata innervation
superior gluteal nerve
What muscles are innervated by superior gluteal nerve?
gluteus med, and glut min, tensor fascia lata
Rectus Femoris origin
Straight head from anterior inferior iliac spine; reflected head from groove just above acetabulum
Rectus Femoris insertion
Base of patella to form the more central portion of the quadriceps femoris tendon
Rectus Femoris action
extends the knee
Rectus Femoris innervation
muscular branches of femoral nerve
Vastus Intermedius origin
Superior 2/3 of anterior and lateral surfaces of femur; also from lateral intermuscular septum of thigh
Vastus Intermedius insertion
Lateral border of patella; also forms the deep portion of the quadriceps tendon
Vastus Intermedius action
extends the knee
Vastus Intermedius innervation
muscular branches of femoral nerve
Vastus medialis origin
Inferior portion of intertrochanteric line, spiral line, medial lip of linea aspera, superior part of medial supracondylar ridge of femur, and medial intermuscular septum
Vastus medialis insertion
Medial base and border of patella; also forms the medial patellar retinaculum and medial side of quadriceps femoris tendon
Vastus medialis action
extends the knee
Vastus medialis innervation
muscular branches of femoral nerve
Vastus Lateralis origin
Superior portion of intertrochanteric line, anterior and inferior borders of greater trochanter, superior portion of lateral lip of linea aspera, and lateral portion of gluteal tuberosity of femur
Vastus Lateralis insertion
Lateral base and border of patella; also forms the lateral patellar retinaculum and lateral side of quadriceps femoris tendon
Vastus Lateralis action
extends the knee
Vastus Lateralis innervation
muscular branches of femoral nerve
Hamstring origin
Common tendon with semitendinosus from superior medial quadrant of the posterior portion of the ischial tuberosity
Hamstring insertion
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle
Hamstring action
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint
Hamstring innervation
tibial nerve (L5,S1,S2)
Biceps Femoris origin
Lateral lip of linea aspera, lateral supracondylar ridge of femur, and lateral intermuscular septum of thigh
Biceps Femoris insertion
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle
Biceps Femoris action
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint
Biceps Femoris innervation
common peroneal nerve
Semimembranosus origin
Superior lateral quadrant of the ischial tuberosity
Semimembranosus insertion
Posterior surface of the medial tibial condyle
Semimembranosus action
Extends the thigh, flexes the knee, and also rotates the tibia medially, especially when the knee is flexed
Semimembranosus innervatin
tibial nerve
Semitendinosus origin
From common tendon with long head of biceps femoris from superior medial quadrant of the posterior portion of the ischial tuberosity
Semitendinosus insertion
Superior aspect of medial portion of tibial shaft
Semitendinosus action
Extends the thigh and flexes the knee, and also rotates the tibia medially, especially when the knee is flexed
Semitendinous innervation
tibial nerve
Pes Anserinus
goose foot
saritorius, semitendonsous and gracilis attach