Gluteal Region- Muscles Flashcards
Piriformis- origin
Anterior surface of sacrum between anterior sacral foramina
Piriformis- insertion
Medial side of superior border of greater trochanter femur
Piriformis- innveration
Nerve to the performs (branches from S1 and S2)
Piriformis- function
Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint
Obturator internus- origin
Anterolateral wall of true pelvis; deep surface of obturator membrane and surrounding bone
Obturator internus- insertion
Medial side of greater trochanter of femur
Obturator internus- innervation
Nerve to obturator internus (L5, S1)
Obturator internus- function
Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint
Gemellus superior- origin
External surface of ischial spine
Gemellus superior- insertion
Along length of superior surface of the obturator internus tendon and into the medial side of greater trochanter of femur with obturator internus tendon
Gemellus superior- innervation
Nerve to obturator internus (L5, S1)
Gemellus superior- function
Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint
Gemellus inferior- origin
Upper aspect of ischial tuberosity
Gemellus inferior- insertion
Along length of superior surface of the obturator interns tendon and into the medial side of greater trochanter of femur with obturator interns tendon
Gemellus inferior- innervation
Nerve to quadratus femoris (L5, S1)
Gemellus inferior- function
Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint
Quadratus femoris- origin
Lateral aspect of the ischium just anterior to the ischial tuberosity
Quadratus femoris- insertion
Quadrate tubercle on the intertrochanteric crest of the proximal femur
Quadratus femoris- innervation
Nerve to quadratus femoris (L5,S1)
Quadratus femoris- function
Laterally rotates femur at hip joint
Gluteus minimus- origin
External surface of ilium between inferior and anterior gluteal lines
Gluteus minimus- insertion
Linear facet on the anterolateral aspect of the greater trochanter
Gluteus minimus- innervation
Superior gluteal nerve (L4, L5, S1)
Gluteus minimus- function
Abducts femur at hip joint; holds pelvis secure over stance leg and prevents pelvic drop on the opposite swing side during walking; medially rotates thigh
Gluteus medius- origin
External surface of the ilium between anterior and posterior gluteal lines
Gluteus medius- insertion
Elongate facet on the lateral surface of the greater trochanter
Gluteus medius- innervation
Superior gluteal nerve (L4, L5, S1)
Gluteus medius- function
Abducts femur at hip joint; holds pelvis secure over stance leg and prevents pelvic drop on the opposite swing side during walking; medially rotates thigh
Gluteus maximus- origin
Fascia covering gluteus medium, external surface of ilium behind posterior gluteal line, fascia of erector spine, dorsal surface of lower sacrum, lateral margin of coccyx, external surface of sacrotuberous ligament
Gluteus maximus- insertion
Posterior aspect of iliotibial tract of fascia lata and gluteal tuberosity of proximal femur
Gluteus maximus- innveration
Inferior gluteal nerve (L5, S1, S2)
Gluteus maximus- function
Powerful extensor of flexed femur at hip joint; lateral stabilizer of hip joint and knee joint; laterally rotates and abducts thigh
Tensor fasciae latae- origin
Lateral aspect of crest of ilium between anterior superior iliac spine and tubercle of the crest
Tensor fasciae latae- insertion
Iliotibial tract of fascia lata
Tensor fasciae latae- innervation
Superior gluteal nerve (L4, L5, S1)
Tensor fasciae latae- function
Stabilizes the knee in extension
