Anatomy in detail:
3. GLUTEUS MAXIMUS
The left and right gluteus maximus muscles are the largest skeletal muscles of the body, forming the superficial muscle layer of the buttocks.
gluteus maximus keeping it simple
Atttachments of the gluteus maximus.
The gluteus maximus muscles attach to multiple structures, many more than the current standard description covers.
- The ilium of the pelvis. Posterior to the posterior gluteal line (attaching to a narrow, semi-lunar area with a rough surface), and the posterior superior iliac crest.
- The sacrum (posterior inferior edge).
- The coccyx (lateral sides of the posterior surface).
- The aponeurotic fascia of the gluteus medius muscle.
- The sacrotuberous ligament (posterior surface).
- The tuberoiliac ligament (part of the long posterior (dorsal) sacroiliac ligament).
- The thoraco-lumbar fascia. (Through its attachment to the raphe of the thoracolumbar fascia, the gluteus maximus is coupled to the ipsilateral multifidus muscle and to the contralateral latissimus dorsi muscle.)
- The iliotibial tract. Three-quarters of the fibres form a superficial lamina (layer) which narrows and attaches between the two layers of the tensor fascia latae, forming part of the iliotibial tract. (a.k.a. iliotibial band.)
- Gluteal tuberosity of the femur. Via an aponeurosis (thin sheet of strong connective tissue) formed from the deeper muscle fibres. (The gluteus maximus attaches between the attachment sites of the vastus lateralis and adductor magnus).
Gluteus maximus - male and female.
The shape of the gluteus maximus differs between male and female as does the the shape of the pelvic bones, with the female gluteus maximus rounder to span the wider female pelvis as shown in the image below.
The gluteus maximus muscles cover a lot of complicated anatomy in the posterior pelvic region.
For example, many smaller muscles (including the piriformis, gluteus minimus and gluteus medius) and a complex web of connective tissues which are prone to stress and pain when the when the gluteus maximus are not fully utilised.
The gluteus maximus muscles should be fully active, providing stability at the back of the pelvis and connecting the legs to Base-Line support.
Optimising the use of your muscles = Better health.
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