Gluteal region Flashcards
Origin of gluteus maximus?
Gluteal surface of ilium, thoracolumbar fascia, dorsal surface of sacrum, lateral margin of coccyx, sacrotuberous ligament
Insertion of gluteus maximus?
Upper fibers: posterior part of iliotibial tract
Lower fibers: gluteal tuberosity of femur
Action of gluteus maximus?
Upper fibers: extension, external rotation, abduction of the hip joint
Lower fibers: adduction of the hip joint
Innervation of gluteus maximus?
Inferior gluteal nerve (L5-S2)
Origin of gluteus medius?
Gluteal surface of ilium (between the anterior and posterior gluteal lines)
Insertion of gluteus medius?
Lateral surface of the greater trochanter
Action of gluteus medius?
Abduction + internal rotation of hip joint, pelvic stabilisation
Innervation of gluteus medius?
Superior gluteal nerve (L4-S1)
Origin of gluteus minimus?
Gluteal surface of ilium (between inferior and anterior gluteal line)
Insertion of gluteus minimus?
Anterolateral aspect of the greater trochanter
Action of gluteus minimus?
Abduction + internal rotation of the hip joint, pelvic stabilisation
Innervation of gluteus minimus?
Superior gluteal nerve (L4-S1)
Origin of tensor fasciae latae?
Anterior superior iliac spine (ASIS) and outer lip of the iliac crest
Insertion of tensor fasciae latae?
Lateral condyle of tibia (via iliotibial tract)
Action of tensor fasciae latae?
Internal rotation (weak abduction) at hip joint, external rotation (weak flexion + extension) at knee joint, stabilises hip and knee joint
Innervation of tensor fasciae latae?
Superior gluteal nerve (L4-S1)
Origin of piriformis?
Anterior surface of the sacrum, gluteal surface of ilium (near posterior inferior iliac spine), sacrotuberous ligament
Insertion of piriformis?
Apex of the greater trochanter of the femur
Action of piriformis?
External rotation + abduction of hip joint, stabilises head of femur in acetabulum
Innervation of piriformis?
Direct branches from the sacral plexus (L5-S1) and the ventral rami of S1-S2
Origin of obturator internus?
Posterior surface of the obturator membrane, bony boundaries of the obturator foramen
Insertion of obturator internus?
Medial surface of the greater trochanter above the trochanteric fossa
Action of obturator internus?
External rotation of extended thigh, abduction of flexed thigh, stabilisation of hip joint
Innervation of obturator internus?
Obturator internus nerve (L5-S2)
Origin of gemellus superior?
Ischial spine
Insertion of gemellus superior?
Medial surface of the greater trochanter (via the tendon of obturator internus)
Action of gemellus superior?
Thigh external rotation, abduction of thigh from flexed hip, stabilises head of femur in acetabulum
Innervation of gemellus superior?
Obturator internus nerve (L5-S2)
Origin of gemellus inferior?
Ischial tuberosity
Insertion of gemellus inferior?
Medial surface of the greater trochanter of femur (via the obturator internus tendon)
Action of gemellus inferior?
External rotation + abduction (from flexed hip) at hip joint, stabilises head of femur in acetabulum
Innervation of gemellus inferior?
Quadratus femoris nerve (L4-S1)
Origin of quadriceps femoris?
Ischial tuberosity
Insertion of quadriceps femoris?
Intertrochanteric crest of femur
Action of quadriceps femoris?
External rotation + assisting abduction in hip joint, stabilises head of femur in acetabulum
Innervation of quadriceps femoris?
Quadratus femoris nerve (L4-S1)