Kinesiology Lower Extremities

sacroiliac joint

pseudo gliding joint that connects the sacrum to the ilium

pelvic symphysis

amphiarthrotic joint (fibrocartilage ring) that connects the two pubic bones

acetabulofemoral joint

ball and socket joint formed by the femoral head and acetabulum

adductor brevis

movement: adduction

location: medial, shortest adductor, deep

adductor longus

movement: adduction

location: medial, longesdt; inserts anterior pubis; inserts femur

adductor magnus

movement: adduction

location: medial; largest?; orgin pubis; inserts femur

tensor fascia latae

movement: abduction (prime action), hip flexion

location: lateral; on IT band; orgin iliac crest; insert tibia

gluteus medius

movement: abduction, internal rotation

location: lateral; orginates illium; inserts femur

gluteus minimus

movement: abduction, internal rotation

location: originates ilium; inserts femur, deeper

gluteus maximus

movement: hip extension, hip external rotation

location: posterior; origin ilium; insert femur

bicep femoris

movement: hip extension, knee flexion, external rotation

location: posterior; hamstring (most lateral); two heads at origin and two heads insert on fibula

semiteninosus

movement: hip extension, knee flexion, internal rotation

location: posterior; hamstring (most medial); originate hip bone; insert tibia

semimembranous

movement: hip extension, knee flexion, internal rotation

location: posterior; hamstring (middle); origin hip bone; inserts tibia

iliopsoas

movement: hip flexion

location: anterior, originates vertebrate + inner ilium; inserts on lesser trochanter of femur

sartorious

movement: knee flexion, external rotation as it flexes

location: anterior; strap shape; origin iliac spine, inserts tibia

rectus femoris

movement: hip flexion, knee extension

location: anterior; quadriceps; crosses hip/origin illiac spine; inserts patella and tibia

pectineus

movement: hip flexion, hip adduction

location: anteromedial; origin pubic bone; inserts femur

knee joint type

hinge

patella femoral joint

gliding

vastus intermedialis

movement: knee extension

location: deep in the middle, only crosses knee; orgin femur and inserts tibia

vastus lateralis

movement: knee extension

location: anterior + most lateral; rotate medial to isolate; originate femur + insert tibia

vastus medialis   (VMO)

movement: knee extension

location: superomedial; roate lateral to isolate; orgin femur + insert tibia

popliteus

movement: knee flexion; internal rotation in flexion

location: right behing knee; origin femur + insert tibia