Gluteal region muscles Flashcards
Gluteus Maximus Distal attachment
Most fibers end in iliotibial tract, which inserts into lateral condyle of tibia; some fibers insert on gluteal tuberosity of femur
Gluteus Maximus proximal attachment
Ilium posterior to posterior gluteal line; dorsal surface of sacrum and coccyx; and 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 its lateral rotation; steadies thigh and assists in rising from sitting
Gluteus Medius proximal attachment
External surface of ilium between anterior and posterior gluteal lines
Gluteus Medius Distal attachment
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 action
Abduct and anterior portions medially rotate hip joint; keep pelvis level when opposite limb is elevated
Gluteus minimus Proximal attachment
External surface of ilium between anterior and inferior gluteal lines
Gluteus minimus distal attachment
Anterior surface of greater trochanter of femur
Gluteus minimus innervation
Superior gluteal nerve L4, L5, S1
Tensor Fasciae Latae Proximal attachment
Anterior superior iliac spine; anterior part of iliac crest
Tensor Fasciae Latae distal attachment
Iliotibial tract, which attaches to lateral condyle of tibia (Gerdy tubercle)
Tensor Fasciae Latae innervation
Superior Gluteal nerve L4, L5, S1
Tensor Fasciae Latae actions
Flexes hip joint, acts with gluteus maximus to stabilize the extended knee joint
Piriformis proximal attachment
Anterior surface of 2nd-4th sacral segments, superior margin of greater sciatic notch and sacrotuberous ligament
Piriformis distal attachment
Superior border of greater trochanter of femur
Piriformis innervation
Branches of anterior rami S1, S2
Piriformis action
Laterally rotate extended hip joint; abduct flexed hip joint; steady femoral head in acetabulum (Stabilizes hip joint)
Obturator internus action
Laterally rotate extended hip joint; abduct flexed hip joint; steady femoral head in acetabulum (Stabilizes hip joint)
Gemelli superior and inferior action
Laterally rotate extended hip joint; abduct flexed hip joint; steady femoral head in acetabulum (Stabilizes hip joint)
Obturator internus proximal attachment
pelvic surface of ilium and ischium, obturator membrane
Obturator internus distal attachment
Medial surface of greater trochanter (trochanteric fossa) of femur
