Superficial gluteal region Flashcards
Origin of gluteal maximus
Posterior surface of ilium, sacrum and coccyx
Attachment of gluteus maximus
Iliotibial tract and greater trochanter
Action of gluteus maximus
Main thigh extensor,
Assists with lateral rotation
Innervation of gluteus maximus
Inferior gluteal nerve
Origin of gluteal medius
Gluteal (posterior) surface of ilium
Attachment of gluteal medius
Lateral surface of greater trochanter
Action of gluteal medius
Abducts and medially rotates lower limb
During locomotion it secures the pelvis, preventing pelvic drop of the opposite limb
Innervation of gluteal medius
Superior gluteal nerve
Origin of gluteal minimus
Ilium
Attachment of gluteal minimus
Anterior side of greater trochanter
Action of gluteal minimus
Abducts and medially rotates lower limb
During locomotion it secures the pelvis, preventing pelvic drop on opposite limb
Innervation of gluteal minimus
Superior gluteal nerve
Origin of tensor fascia lata
Anterior iliac crest and ASIS
Attachment of tensor fascia lata
Iliotibial tract which itself attaches to the lateral condyle of the tibia
Actions of the tensor fascia lata
Abduction and medial rotation of lower limb
Supportive role in gait cycle
Innervation of tensor fascia lata
Superior gluteal nerve
Muscles of the superficial gluteal regions
Gluteus maximus, gluteus medius, gluteus minimus and tensor fascia lata
How is the pelvis stabilised during locomotion
In standing, gluteus medius and minimus contract when the contralateral leg raised to prevent pelvis dropping on that side
Consequence of superior gluteal nerve damage
Positive trendelenberg sign
How do you test for trendelenberg sign
Ask patient to stand unassisted on each leg in turn
What’s positive trendelenberg sign
Pelvic drop occurs on unsupported leg (uneven level of iliac crests)
