Muscles crossing the Hip & Knee Joints Flashcards
Iliopsoas - iliacus (PM)
O: iliac fossa and crest
I: femur
PM for thigh flexion
Iliopsoas - psoas major (PM)
O: lumbar vertebrae and T12
I: femur
PM for thigh flexion
Sartorius
O: iliac spine
I: tibia
flexion, abduction, and lateral rotation
Psoas minor
O: lumbar vertebrae
I: pubic bone
Gluteus maximus
O: dorsal ilium, sacrum, and coccyx
I: femur and iliotibial tract
thigh extension (most effective when thigh is flexed), lateral rotation, and abduction
Gluteus medius
O: ilium
I: femur
thigh abduction and medial rotation
Gluteus minimus
O: ilium
I: femur
also thigh abduction and medial rotation
Piriformis
O: sacrum
I: femur
thigh lateral rotation and abduction
Obturator externus
O: margins of obturator foramen
I: femur
Obturator internus
O: obturator foramen
I: greater trochanter of femur
also lateral rotation and abduction
Gemellus superior and inferior
O: ischial spine (superior)
I: femur
also lateral rotation and abduction
Quadratus femoris
I: femur
thigh lateral rotation
Rectus femoris
quadriceps femoris
O: iliac spine
I: patella and tibial tuberosity
leg extension, and thigh flexion at hip
Vastus lateralis
quadriceps femoris
O: linea aspera on femur
I: also patella and tibial tuberosity
leg extension and stabilizer
Vastus medialis
quadriceps femoris
O: also linea aspera on femur
I: also patella and tibial tuberosity
leg extension
Vastus intermedius
quadriceps femoris
O: femur shaft
I: also patella and tibial tuberosity
leg extension
Tensor fascia lata
O: iliac crest
I: iliotibial tract
stabilizer
Biceps femoris
hamstrings - PM
O: ischial tuberosity (long head), and femur (short head)
I: fibula and tibia
PM for thigh extension and knee flexion
Semitendinosus
hamstrings - PM
O: also ischial tuberosity
I: tibia
PM for thigh extension and knee flexion
Semimembranosus
hamstrings - PM
O: also ischial tuberosity
I: also tibia
PM: thigh extension and knee flexion
Adductor magnus
O: ischial and pubic rami
I: femur
adduction, medial rotation, and flexion of thigh -> anterior part
thigh extension -> posterior part
Adductor longus
O: pubis
I: linea aspera on femur
also adduction, medial rotation, and flexion of thigh
Adductor brevis
O: pubic ramus
I: also linea aspera on femur
also adduction, medial rotation, and flexion of thigh
Pectineus
O: pubis
I: femur
also adduction, medial rotation, and flexion of thigh
Gracilis
O: pubis
I: tibia
adduction, medial rotation, and flexion of LEG
