Gluteal Region and Hip Flashcards
Features of the innominate bone (medial view)
Features of the innominate bone (lateral view)
What forms the greater sciatic foramen?
- Greater sciatic notch
- Sacrotuberous ligament
- Sacrospinous ligament
What forms the lesser sciatic foramen?
- Lesser sciatic notch
- Sacrospinous ligament
- Sacrotuberous ligament
What is this muscle?
Gluteus maximus
What is the origin of the gluteus maximus?
- Sacrum
- Sacrotuberous ligament
- Ilium behind posterior gluteal line
What is the insertion of the gluteus maximus?
- Iliotibial tract (3/4)
- Gluteal tuberosity of femur (1/4)
What innervates the gluteus maximus?
Inferior gluteal nerve (L5 - S1,2)
What is the function of the gluteus maximus?
- Extend hip
- Assist lateral rotation
What is this muscle?
Tensor fasciae latae
What is the origin of the tensor fasciae latae?
- Anterior iliac crest
- Anterior superior iliac spine
What is the insertion of the tensor fasciae latae?
Iliotibial tract
What is the innervation of the tensor fasciae latae?
Superior gluteal nerve (L4,5 - S1)
What is this muscle?
Gluteus medius
What is the origin of the gluteus medius?
Ilium between posterior and anterior gluteal line
What is the insertion of the gluteus medius?
Greater trochanter of femur (lateral surface)
What is the innervation of the gluteus medius?
Superior gluteal nerve (L4,5 S1)
What is the function of the gluteus medius?
Abducts and medially rotates hip
What is this muscle?
Gluteus minimus
What is the origin of the gluteus minimus?
Ilium between anterior and inferior gluteal lines
What is the insertion of the gluteus minimus?
Greater trochanter of femur (anterior surface)
What innervates the gluteus minimus?
Superior gluteal nerves (L4,5 S1)
What is the function of the gluteus medius?
Abducts and medially rotates hip
What is this muscle?
Piriformis
What is the origin of the piriformis?
- Anterior sacrum
- Sacrotuberous ligament
What is the insertion of the piriformis?
Greater trochanter of femur (superior border)
What is the innervation of the piriformis?
Anterior rami S1,2
What is the function of the piriformis?
Laterally rotates hip
What is this muscle?
Obturator internus
What is the origin of the obturator internus?
Pelvic surface of obturator membrane and surrounding bones
What is the insertion of the obturator internus?
Medial side of the greater trochanter
What is the innervation of the obturator internus?
Nerve to obturator internus (L5,S1)
What is the function of the obturator internus?
Lateral rotation of hip
What are these muscles?
- Superior gemelli
- Inferior gemelli
What is the origin of the superior and inferior gemelli?
Superior - Ischial spine
Inferior - Ischial tuberosity
What is the insertion of the superior and inferior gemelli?
Blend with tendon of obturator internus
What is the innervation of the superior and inferior gemelli?
Superior - Nerve to obturator internus
Inferior - Nerve to quadratus femoris
What is the function of the superior and inferior gemelli?
Lateral rotation of hip
What is this muscle?
Quadratus femoris
What is the origin of the quadratus femoris?
Ischial tuberosity
What is the insertion of the quadratus femoris?
Quadrate tubercle on intertrochanteric crest of femur
What innervates the quadratus femoris?
Nerve to quadratus femoris (L5,S1)
What is the function of the quadratus femoris?
Lateral rotation of hips
What is this muscle?
Obturator internus
What is the origin of the obturator externus?
Outer surface of obturator membrane
What is the insertion of the obturator externus?
Trochanteric fossa
What innervates the obturator externus?
Obturator nerve L3,4
What is the function of the obturator externus?
Lateral rotation of hip
What are the nerve roots of the sciatic nerve?
L4,5 S1-3
What does the sciatic nerve branch into?
- Tibial nerve
- Common peroneal nerve
Where does the iliofemoral ligament attach?
AIIS –> Intertrochanteric line
What movements does the iliofemoral ligament limit?
- Extension
- Lateral rotation
- Adduction
- Abduction
Where does the pubofemoral ligament attach?
Iliopubic eminence –> Lower part of intertrochanteric line
What movements does the pubofemoral ligament limit?
- Extension
- Lateral rotation
- Abduction
Where does the ischiofemoral ligament attach?
Posterior aspect of acetabulum –> greater trochanter
What movements does the ischiofemoral ligament limit?
- Extension
- Medial rotation
- Adduction