Lower Limb.6 (Muscles,Nerves and vessels of the gluteal region)

Lower Limb.6 (Muscles,Nerves and vessels of the gluteal region)


The two layers, the deep layer and the superficial
layer. ¾ of the gluteus maximus will be inserted into the tract. Therefore, the iliotibial
tract extends from the iliac tubercle to the lateral condyle of the tibia and its upper
part gives insertion to the gluteus maximus posteriorly and anteriorly it splits to give
insertion to the tensor fascia lata. If, we remove the gluteus maximus, then on its “reflection”
we’ll find
the greater trochanter and the sciatic nerve. And, to the greater trochanter, there will
be another gluteal muscle, which is called the gluteus medius. When, we reflect the gluteus
medius, we’ll find the superior gluteal neurovascular bundle, we’ll find branches of the superior
gluteal nerve and vessels. And, very deep to the vessels there will be the gluteus minmus,
which goes also to the greater trochanter. The, gluteus minmus and the gluteus medius
enclose between them the superior gluteal neurovascular bundle. Both, of them arise
from the gluteal surface of the hip bone and both of them are inserted into the greater
trochanter. Therefore, the gluteal muscles are arranged in the form of a 3 layers. The,
first layer is the gluteus maximus, the 2nd & 3rd layer are attached to the greater trochanter.
The, 2nd layer is the gluteus medius, the 3rd layer will be the gluteus minmus. And,
between the gluteus medius and the gluteus minmus, there will be the superior gluteal
neurovascular bundle. All, of the above muscles are supplied by the superior
gluteal nerve, the gluteus medius, the gluteus minmus and the tensor fascia lata. But, the
gluteus maximus is supplied only by the inferior gluteal nerve. So, 2 muscles are supplied
by the superior gluteal nerve, the 3 muscles are: the gluteus medius, the gluteus minmus
and between them pass the superior gluteal nerve and vessels as they supply those muscles
as well as they supply the tensor fascia lata, however the only supplied muscle by the inferior
gluteal nerve is the gluteus maximus. Now, when we go a little lower, we’ll find the
short lateral rotator of the thy of the deep joint. The, short lateral rotator begin (from
above down) by this muscle that passes through the greater sciatic foramen with the sciatic
nerve, this muscle is called the piriformis muscle. Then, the
sciatic nerve crosses 4 lateral rotators below
the piriformis. If, I reflect the sciatic nerve this way! I’ll find the tendon of the
obturator internus muscle. (this is the tendon of the obturator internus muscle crossed by
the sciatic nerve). As, soon as the sciatic nerve comes from the obturator internus, it
crosses the tenon of the biceps with the two gemelli muscles. We, have the gemellus superior
muscle attached to the upper part of
the tendon and we have the inferior gemellus muscle attached to the lower half of the tendon.
When, we go more down, there will be the largest muscle, which is quadrangular in shape. This,
quadrangular muscle is called the quadratus femoris and it extends between the ischial
tuberosity and the greater trochanter and it also crossed by the
sciatic nerve.

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