actions second half Flashcards
gluteus maximus
- extends the hip
- laterally rotates the thigh
- upper fibers aid to abduct the thigh
gluteus medius
- abducts and medially rotates thigh
2. Functionally: stabilizes pelvis and prevents free limb from sagging during gait
gluteus minimus
- abducts and medially rotates thigh
tensor fascia lata
- abducts with hip in flexed position
2. rotates & abducts a flexed thigh
piriformis
- medially rotates the thigh when hip is flexed past 90°
2. laterally rotates the thigh when hip is flexed less than 90°
superior gemellus
laterally rotates thigh (femur)
obturator internus
laterally rotates thigh (femur)
inferior gemellus
laterally rotates thigh (femur)
obturator externus
laterally rotates thigh (femur)
quadratus femoris
laterally rotates thigh (femur)
semitendinosus
- extends hip
- flexes knee
- medially rotates the tibia (open chain)
semimembranosus
- extends hip
- flexes knee
- medially rotates the tibia (open chain)
biceps femoris
- flexes knee
- extends hip (long head)
- laterally rotates tibia (open chain)
sartorius
- flexes hip – It does all these together
- flexes knee
- external rotation and abduction of hip
rectus femoris
- extends knee
2. flexes hip
vastus lateralis
extends knee
vastus medialis
extends knee
vastus intermedius
extends knee
iliacus
- flexes hip
2. externally rotates the femur
psoas major
- flexes hip
2. externally rotates the femur