Muscles Of Gluteal And Posterior Thigh Flashcards
Gluteus Maximus insertion
Most fibers end in ilio tibial tract which inserts into lateral condyle of tibia
Some fibers insert on gluteal tuberosity of femur
Gluteus Maximus origin
Ilium posterior to posterior gluteal line
Dorsal surface of sacrum and coccyx
Sacrotuberous ligament
Gluteus Maximus innervation
Inferior gluteal nerve
L5, s1, s2
Gluteus Maximus action
Extends hip joint between flexed and standing positions and assists in lateral rotation
Steadies thigh and assists in rising from sitting position
Gluteus medius origin
External surface of ilium between anterior and posterior gluteal lines
Gluteus medius insertion
Lateral surface of greater trochanter of femur
Gluteus medius innervation
Superior gluteal nerve
L4, l5, s1
Gluteus medius action
Abduct and anterior portions medially rotate hip joint
Keep pelvis level when opposite limb is elevated
Gluteus minimus origin
External surface of ilium between anterior and inferior gluteal lines
Gluteus minimus insertion
Anterior surface of greater trochanter of femur
Gluteus minimus innervation
Superior gluteal nerve l4, l5, s1
Gluteus minimus action
Abduct and anterior portions medially rotate hip joint
Keep pelvis level when opposite limb is elevated
Tensor fasciae latae origin
Anterior superior iliac spine
Anterior part of iliac crest
Tensor fasciae latae insertion
Ilio tibial tract which attaches to lateral condyle of tibia
Gerdy tubercle
Tensor fasciae latae innervation
Superior gluteal nerve l4, l5, s1
Tensor Fasciae latae action
Flexes hip joint
Acts with gluteus Maximus to stabilize the extended knee joint
Semi tendinous origin
Ischial tuberosity
Semitendinosus insertion
Medial surface of superior part of tibia
Semitendinosus innervation
Tibial division of sciatic nerve
L5, s1, s2
Semitendinosus action
Extend hip joint, flex knee joint and rotate the leg medially when knee is flexed
When hip and knee are flexed, can extend trunk
Semimembranosus origin
Ischial tuberosity
Semimembranosus insertion
Posterior part of medial condyle of tibia
Reflected attachment forms oblique popliteal ligament to lateral femoral condyle
Semimembranosus innervation
Tibial division of sciatic nerve l5, s1, s2
Semimembranosus action
Extend hip joint
Flex knee joint and rotate leg medially when knee is flexed
When hip and knee are flexed, can extend trunk
Biceps femoris origin
Long head: ischial tuberosity
Short head: linea aspera and lateral supracondylar line of femur
Biceps femoris insertion
Lateral side of head of fibula ; tendon is split at this site by fibulae collateral ligament of knee
Biceps femoris innervation
Long head: tibial division of sciatic nerve l5, s1 s2
Short head: common fibulae division of sciatic nerve l5, s1, s2
Biceps femoris action
Flexes knee joint and rotates it laterally when knee is flexed
Extends hip joint like when starting to walk
Piriformis origin
Anterior surface of 2nd to 4th sacral segments
Superior margin of greater sciatic notch and sacrotuberous ligament
Piriformis insertion
Superior border of greater trochanter of femur
Piriformis innervation
Branches of anterior rami of s1, s2
Piriformis action
Laterally rotate extended hip joint
Abduct flexed hip joint
Steady femoral head in acetabulum (stabilizes hip joint)
Obturator internus origin
Pelvic surface of ilium and ischium
Obturator membrane
Obturator internus insertion
Medial surface of greater trochanter (trochanteric fossa) of femur
Obturator internus innervation
Nerve to obturator internus
L5, s1
Obturator internus action
Laterally rotate extended hip joint
Abduct flexed hip joint
Steady femoral head in acetabulum (stabilizes hip joint)
Superior gemelli origin
Ischial spine
Inferior gemelli origin
Ischial tuberosity
Superior gemelli insertion
Medial surface of greater trochanter (trochanteric fossa) of femur
Inferior gemelli insertion
Medial surface of greater trochanter (trochanteric fossa) of femur
Superior gemelli innervation
Nerve to obturator internus l5, s1
Inferior gemelli innervation
Nerve to quadratus femoris
L5, s1
Superior gemelli action
Laterally rotate extended hip joint
Abduct flexed hip joint
Steady femoral head in acetabulum (stabilizes hip joint)
Inferior gemelli action
Laterally rotate extended hip joint
Abduct flexed hip joint
Steady femoral head in acetabulum ( stabilizes hip joint)
Quadratus femoris origin
Lateral border of ischial tuberosity
Quadratus femoris insertion
Quadrate tubercle on intertrochanteric crest of femur and area inferior to it
Quadratus femoris innervation
Nerve to quadratus femoris l5, s1
Quadratus femoris action
Laterally rotates hip joint
Also pulls femoral head into acetabulum to stabilize hip joint/ pelvis
