Gluteus Maximus Muscle Function Origin Insertion Human Anatomy Kenhub
Hey, everyone! It's Matt from Kenhub, andin this tutorial, we will discuss the origin, insertion, innervation, and function of thegluteus maximus. The gluteus maximus muscle builds the mostsuperficial layer of the dorsal gluteal musculature and so forms the surface anatomy of the glutealregion or buttocks. The innervation is supplied by the inferiorgluteal nerve, a branch of the sacral plexus. Numerous vessels and nerves run under thegluteus maximus muscle, including the sciatic nerve, the pudendal nerve, and the superiorgluteal vessels. The muscle originates from the sacrum (dorsalpart), ilium (behind the posterior gluteal
line), the thoracolumbar fascia, and the sacrotuberousligament. Its caudal fibers insert at the gluteal tuberosityof the femur. On the contrary, the cranial fibers go over into the iliotibial tract,a strong fibrous band at the outside of the thigh, inserting at the lateral condyle atthe tibia. The gluteus maximus muscle is the most powerfulextensor and external rotator of the hip. It also supports the stabilization of thehip joint. The contraction of the cranial fibers leads to abduction, whereas the contractionof the caudal fibers causes an adduction. The iliotibial tract enhances the lateralthigh fascia, and thus, relieves the pressure
of the femur. That is also known as tensionband principle. This tutorial is more fun than reading a textbook,righté If you want more tutorials, interactive quizzes, articles, and an atlas of human anatomy,click on the â€œTake me to Kenhubâ€� button. It is time to say goodbye to your old textbooksand say hello to your new anatomy learning partner, Kenhub! See you there! kenhub .