1/15
4 groups
Muscles of the Psoas Group
Psoas Major, iliacus
Psoas Major
Origin - Bodies and Transverse Processes of Lumbar Vertebrae
Insertion - Lesser trochanter of femur
Action - flexes the thigh at the hip
Innervation - Lumbar ventral rami of spinal nerves

Iliacus
Origin - Iliac fossa
Insertion - Lesser trochanter of femur
Action - flexes thigh at the hip
Innervation - Femoral nerve
Muscles of the Gluteal Group
Gluteus maximus, medius, minimums, and Tensor fasciae latae
Gluteus Maximus
Origin - Posterior ilium, sacrum, sacrotuberous ligament, coccyx
insertion - iliotibial tract and gluteal tuberosity of femur
Action - extends thigh at hip lateral rotation of the thigh at hip
Innervation - Inferior gluteal nerve

Gluteus medius
Origin - lateral surface of ilium
Insertion - greater trochanter of femur
Action - abducts thigh at hip
Innervation - Superior gluteal nerve

Gluteus minimus
Origin - lateral surface of ilium
Insertion - Grater trochanter of femur
Action - Abducts and medially rotates thigh at hip
Innervation - Superior gluteal nerve

Tensor Fasciae Latae
Origin - iliac crest and anterior superior iliac spine
Insertion - iliotibial tract
Action - abducts and flexes thigh at hip
Innervation - superior gluteal nerve

Muscles of the Abductor/Lateral Rotator Group
Piriformis
Piriformis
Origin - Anterior surface of sacrum
Insertion - Greater trochanter of femur
Action - laterally rotates thigh at hip
Innervation - Nerve to the Piriformis

Muscles of the Medial Compartment of the Thigh (Adductor Group)
Pectineus, Adductor longus, Adductor Brevis, Adductor magnus, Gracilis
Pectineus
Origin - Superior ramus of pubic bone
Insertion - Posterior femur just inferior to lesser trochanter
Action - adducts and flexes thigh at hip
Innervation - Obturator nerve and femoral nerve

Adductor Longus
Origin - anterior pubic bone near pubic symphysis
Insertion - Linea Aspera
Action - Adducts thigh at hip
Innervation - Obturator Nerve

Adductor Brevis
Origin - anterior pubic bone and inferior ramus of pubic bone
Insertion - Proximal Linea aspera
Action - adducts thigh at hip
Innervation - Obturator Nerve

Adductor Magnus
Origin - Inferior ramus of pubic bone ischial ramus and ischial tuberosity
Insertion - Linea Apera, posterior femur/adductor tubercle
Action - Adducts thigh at hip, extends thigh at hip
Innervation - Obturator nerve, Sciatic nerve

Gracilis
Origin - inferior ramus of pubic bone
Insertion - Medial surface of proximal tibia
Action - adducts thigh at hip and flexes leg at knee
Innervation - obturator nerve
