Week 4 Muscles of the hip and thigh regions. (insertion, origin and action) Flashcards
Gluteus maximus action
- major extensor of hip joint
- lateral rotator,
- abductor (upper fibres)
- tighten iliotibial band (inferior fibre)
- “straightening up from bending position”
Gluteus maximus origin
- Posterior gluteal line and roughened area posterior to it
- iliac crest
- posterior surfaces of sacrum and coccyx
- sacrotuberous ligament
- gluteal aponeurosis
Gluteus maximus insertion
- Iliotibial tract of fascia latae
* Gluteal tuberosity of femur
Gluteus medius action
Major abductor and lateral rotator (posterior fibers) of hip joint
Gluteus medius origin
- Gluteal surface of ilium between anterior and posterior gluteal lines
- Gluteal aponeurosis
Gluteus medius insertion
Lateral surface of greater trochanter of femur
Gluteus minimus action
Major abductor and medial rotator of hip joint
Gluteus minimus origin
Gluteal surface of ilium between anterior and inferior gluteal lines
Gluteus minimus insertion
Anterior surface of greater trochanter of femur
Piriformis actions
- Lateral rotator of extended hip joint
* Abductor of flexed hip joint
Piriformis origin
Anterior surface of sacrum between anterior sacral foramina
Piriformis insertion
Medial side of superior border of greater trochanter
Obturator internus, Superior & Inferior Gemelli actions
- Lateral rotator of hip joint
* Abductor of flexed hip joint
Obturator internus origin
- Pelvic surface of obturator membrane
- Margins of obturator foramen
- Pelvic surface of ilium
Obturator internus insertion
Medial surface of greater trochanter just superior to trochanteric fossa
Superior gemellus origin
External surface of ischial spine
Superior gemellus insertion
Medial surface of greater trochanter just superior to trochanteric fossa
Quadratus femoris action
- Lateral rotator and adductor of hip joint
* Stabilises position of head of femur in acetabulum
Quadratus femoris origin
Lateral surface of body of ischium anterior to tuberosity
Quadratus femoris insertion
Quadrate tubercle of femur and vertical region inferior to it
Obturator externus action
Lateral rotator of hip joint
Obturator externus origin
- External surface of obturator membrane
* External margins of obturator foramen
Obturator externus insertion
Trochanteric fossa of femur
Iliopsoas: Psoas major + Iliacus actions
Flexor and lateral rotator of hip joint
Iliopsoas: Psoas major + Iliacus insertion
Lesser trochanter of femur
Psoas Major origin
Bodies (T12-L5) and transverse processes of lumbar vertebrae and their intervertebral discs
Origin of Iliacus
Iliac fossa
Tensor fascia latae action
Stabilises the knee in extension