Origins
What is the origin of the iliacus?
Illiac fossa
What is the insertion of the psoas major?
Lesser Trochanter
What nerve innervates the gracilis?
obturator nerve
What is the action of the rectus femoris?
flex the hip
extend the knee
What 3 bones make up the pelvis?
illium, ischium, pubis
What is the origin of the TFL?
What is the insertion of the sartorius?
proximal, medial shaft of the tibia at pes anserinus tendon
What nerve innervates the gluteus medius?
superior gluteal nerve
What is the action of the gemellus inferior?
laterally rotate the hip
What type of joint is the femoroacetabular joint, how many DoF does it have, and what are the osteokinematic motions?
ball and socket joint
3 DoF
flexion/extension, abduction/adduction, internal/external rotation
What is the origin of the obturator internus?
Obturator membrane and inferior surface of obturator foramen
What is the insertion of the gluteus minimus?
Anterior aspect of greater trochanter
what nerve innervates the pectineus?
femoral and obturator nerves
What is the action of the adductor longus?
adduct the hip
medially rotate the hip
assist to flex the hip
What are the 3 main bursa of the hip?
trochanteric bursa
ischial bursa
gluteofemoral bursa
What is the origin of the adductor magnus?
Inferior ramus of the pubis, ramus of the ischium and ischial tuberosity
What is the insertion of the adductor brevis?
pectineal line and medial lip of linea aspera
What nerve innervates the biceps femoris?
long head: sciatic nerve (tibial branch)
short head: sciatic nerve (fibular branch)
What is the action of the psoas minor?
assist to create lordotic curvature in the lumbar spine
tilt pelvis posteriorly
Why is the ligamentum teres important to the hip joint? (what is its function)
brings blood to the head of the femur
increases stability of the hip joint by preventing IR and ER forces when the hip is flexed more than 90 degrees
What is the origin of the gluteus maximus?
Coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments
What is the insertion of the obturator externus?
Trochanteric fossa of femur
What nerve innervates the piriformis?
sacral plexus
What is the action of the semimembranosus?
flex the knee
medially rotate the flexed knee
extend the hip
assist to medially rotate the hip
tilt the pelvis posteriorly
Lunate surface: articulates with the femoral head making 3/4 of a circle
transverse acetabular ligament: completes the circle with articular cartilage