The knee Flashcards
Rectus Femoris
O: AIIS and rim of the acetabulum
I: attaches to the patella
A: hip flexion, knee extension
Vastus Lateralis
O: a broad aponeurosis from the posterior and lateral surfaces of the femur
I: Lateral border of the patella and the lateral retinaculum
A: Knee extension
Vastus Intermedius
O: anterior and lateral surfaces of the femur
I: Superior border of the patella and fuses with tendons of the other vast mm and directly to the jt capsule
A: Knee extension
Vastus Medialis
O: medial and superior aspects of the femur
I: The medial and superior border of the patella, medial patellar retinaculum
A: Knee extension
Sartorius
O: ASIS
I: medial tibia, near the tibial crest
A: hip flexion, knee flexion, and internal tibial rotation
Biceps Femoris
O: Long head: ischial tuberosity Short head: lower part of the femur
I: Head of the fibula, lateral condyle of the femur
A: Hip extension and ER, Knee flexion and tibial ER
Semitendonosis
O: ischial tuberosity
I: medial aspect of the tibia near the gracilis
A: Hip extension and IR, knee flexion and tibial IR
Semimembranosis
O; ischial tuberosity
I: medial plateau of the tibia
A: hip extension and IR, Knee flexion and tibial IR
Gracilis
O: anterior and inferior to the pubic symphysis
I: pro part of medial surface of the tibia just superior to the semitendonosis tendon in the “pes anserine” group
A: Hip adduction, assists in hip flexion from an extended position, also capable of flexing and internally rotating the knee
Gastrocnemius
O: 2 heads, one above each femoral condyle
I: broad aponeurosis to the achilles
A: Knee flexion and ankle plantar flexion
Plantaris
O: above the lat femoral condyle
I: into the achilles tendon
A: Knee flexion and ankle planter flexion
Popliteus
O: a strong tendon from the lateral femoral condyle
I: proximal, posterior portion of the tibia in a wide spread connection
A: Flexion and IR of the knee. Also unlocking of the knee
