Gluteus minimus muscle
| Glut muscle (a) eus minimus (humans) glut muscle (a) eus profundus (animals) |
|---|
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| Scheme of the deep hip muscles |
| origin |
| Outer surface ( Facies glut (a) ea ) of the iliac bone ( Os ilium ) |
| approach |
| large hillock ( greater trochanter ) of the thigh bone ( femur ) |
| function |
| Humans: inward rotation ( internal rotation ) and spreading movement ( abduction ) of the thigh Animals: stretching ( extension ) and spreading movement |
| Innervation |
| Superior gluteus nerve |
| Spinal segments |
| L4-L5 |
The gluteus minimus muscle ( lat. For "small gluteal muscle") is a skeletal muscle of the lower extremity , more precisely the rear ( dorsal ) layer of the rear hip muscles. It is completely covered by the middle gluteus muscle ( musculus gluteus medius ).
Since it is quite strong in quadruped mammals , it is more aptly referred to here as the deep croup muscle ( Musculus glut (a) eus profundus ).
course
Origin of the gluteus muscle is the surface ( Facies glut (a) ea ) the ilium / iliac wing ( Ala ossis ilium ) of the ilium ( ilium ) between the front and lower Glutäenlinie ( Linea glut (a) ea anterior and Linea glut (a) ea inferior ).
After a transverse course, it is cap-shaped laterally ( laterally ) on the front edge of the large roll hillock ( greater trochanter ) of the thighbone ( femur ).
function
The small gluteal muscle spreads the thigh to the side in the hip joint . When walking and running, it stabilizes the pelvis ( pelvis ) together with the middle gluteal muscle ( musculus gluteus medius ) and prevents it from sinking to the side of the free leg .
The front part of the gluteus muscle also turns the thigh inward and bends it, while the rear part turns the thigh outward and stretches it.
In quadruped mammals, the muscle primarily acts as a hip extensor and abductor .
paralysis
If the small and middle gluteal muscles are paralyzed at the same time, the so-called waddling gait occurs. H. With every step, the pelvis tilts to the side of the free leg ( Trendelenburg symbol ). A typical cause of such paralysis is intramuscular injections .
See also
literature
- Dieter Sasse: Compact textbook anatomy . Volume 2. Schattauer Verlag, 2004, ISBN 978-3-7945-2062-6 , p. 137
- Franz-Viktor Salomon: muscle tissue . In: Anatomy for veterinary medicine . 2nd ext. Edition. Enke Stuttgart, 2008, ISBN 978-3-8304-1075-1 , pp. 147-234