Lower Extremity OIIA's Flashcards
Origin: Gluteus maximus
-Ilium
-Posterior gluteal line
-Dorsal surface of sacrum & coccyx
-Sacrotuberous ligament
Insertion: Gluteus maximus
-IT band
-Gluteal tuberosity
Innervation: Gluteus maximus
Inferior gluteal nerve (L5-S2)
Action: Gluteus maximus
Extension and external rotation of hip
Origin: Gluteus medius
Between anterior and posterior gluteal lines
Insertion: Gluteus medius
Lateral surface of greater trochanter
Innervation: Gluteus medius
Superior gluteal nerve (L4-S1)
Action: Gluteus medius
-Abduction of femur
-Keeps pelvis level when ipsilateral limb is weight bearing
-Internal rotation
Origin: Gluteus minimus
Between inferior and anterior gluteal lines
Insertion: Gluteus minimus
Antero-lateral aspect of the greater trochanter
Innervation: Gluteus minimus
Superior gluteal nerve (L4-S1)
Action: Gluteus minimus
-Abduction of femur
-Internal rotation
-Keeps pelvis level when ipsilateral limb is weight bearing
Origin: Tensor fascia lata (TFL)
ASIS
Insertion: Tensor fascia lata (TFL)
IT band
Innervation: Tensor fascia lata (TFL)
Superior gluteal nerve (L4-S1)
Action: Tensor fascia lata (TFL)
-Abduction
-Internal rotation
-Stabilizes the knee
Origin: Piriformis
Anterior surface of sacrum between S1-S4
Insertion: Piriformis
Superior border of greater trochanter
Innervation: Piriformis
Spinal nerves L5-S2
Action: Piriformis
-External rotation of extended thigh
-Abduction of flexed thigh
-Steadies femoral head in acetabulum
Origin: Obturator internus
Inner surface of the obturator foramen
Insertion: Obturator internus
Medial surface of the greater trochanter
Innervation: Obturator internus
Spinal nerves L5-S2
Action: Obturator internus
-External rotates extended hip
-Abducts flexed thigh
-Steadies femoral head in acetabulum
Origin: Obturator externus
External surface of obturator foramen
Insertion: Obturator externus
Trochanteric fossa of femur
Innervation: Obturator externus
Obturator nerve (L3, L4)
Action: Obturator externus
-External rotation of extended hip
-Abduction of flexed thigh
Origin: Superior & inferior gemellus
-Superior: ischial spine
-Inferior: ischial tuberosity
Insertion: Superior & inferior gemellus
Medial surface of greater trochanter
Innervation: Superior & inferior gemellus
Spinal nerves L5-S1
Action: Superior & inferior gemellus
-External rotation of extended thigh
-Abducts flexed thigh
-Stabilizes the hip
Origin: Quadratus femoris
Lateral border of ischial tuberosity
Insertion: Quadratus femoris
Intertrochanteric crest of the femur
Innervation: Quadratus femoris
Spinal nerves L5-S1
Action: Quadratus femoris
Externally rotates the hip
Origin: Psoas major
Sides of T12-L5 & intervertebral discs
Insertion: Psoas major
Lesser trochanter
Innervation: Psoas major
Spinal nerves L1-S3
Action: Psoas major
Flexes thigh and trunk
Origin: Iliacus
Iliac fossa
Insertion: Iliacus
Lesser trochanter
Innervation: Iliacus
Femoral nerve (L2-L3)
Action: Iliacus
Flexes thigh and trunk
Origin: Sartorius
ASIS
Insertion: Sartorius
Medial superior shaft of tibia- Pes Anserinus
Innervation: Sartorius
Femoral nerve (L2, L3)
Action: Sartorius
Flexes the thigh and flexes the leg
Origin: Rectus femoris
AIIS
Insertion: Rectus femoris
Quadriceps tendon
Innervation: Rectus femoris
Femoral nerve (L2, L3)
Action: Rectus femoris
Extends the leg and flexes the hip
Origin: Vastus lateralis
Greater trochanter
Insertion: Vastus lateralis
Quadriceps tendon
Innervation: Vastus lateralis
Femoral nerve (L2-L4)
Action: Vastus lateralis
Extends the leg
Origin: Vastus medialis
Intertrochanteric line and linea aspera
Insertion: Vastus medialis
Quadriceps tendon
Innervation: Vastus medialis
Femoral nerve (L2-L4)