Download Knee O`s I`s A`s

Psoas
 O- by fleshy slips from
transverse proccesses,
bodies and discs of
lumbar vertebra and T12
 I- lesser trochanter of
femur
 A- Prime mover of hip
flexion, flexes thigh on
trunk when pelvis is
fixed, lateral rotates
thigh, flexes knee
Sartorius
 O- anterior superior iliac
spine
 I- Winds around medial
aspect of knee and
inserts into the medial
aspect of the proximal
tibia
 A- flexes and laterally
rotates thigh, flexes knee
Rectus Femoris
 O- Anterior inferior iliac
spine and superior spine
of the acetabulum
 I- Patella and tibial
tuberoisity
 A- extends knee and
flexes thigh and the hip
Vastus Lateralis
 O- greater trochanter,
intertrochanteric line,
linia aspera
 I- patealla and tibial
tuberosity
 A- extends knee
Vastus Medialis
 O- linia aspera,
intertrochanteric line
 I- patella and tibial
tuberosity
 A- extends knee, inferior
fibers stabilize patella
Vastus Intermedius
 O- anterior and lateral
surface of proximal
femur
 I- patella and tibial
tuberosity
 A- extends knee
Tensor Fascia Latae
 O- Anterior aspect of
iliac crest and anterior
superior iliac spine
 I- iliotibial tract
 A- flexes and abducts
thigh, rotates thigh
medially
Gluteus Maxiumus
 O- dorsal ilium, sacrum
and coccyx
 I- Gluetal tuberosity of
femur, iliotibial tract
 A- major extensor of
thigh
Biceps Femoris
 O- ishial tuberosity,
linea aspera and distal
femur
 I- Passes downward and
inserts into the head of
the fibula and lateral
condyle of tibia
 A- extends thigh and
flexes knee, laterally
rotates leg
Semitendinosis
 O- ishial tuberosity
 I- medial aspect of upper
tibial shaft
 A- extends thigh and
flexes knee, medially
rotates leg
Semimembranosis
 O- ishial tuberosity
 I- medial condyle of tibia
 A- extends thigh and
flexes knee, medially
rotates leg