Gemellus superior muscle
| Gemellus superior muscle |
|---|
|
| Scheme of the deep hip muscles |
| origin |
| Sciatic spine |
| approach |
| Femur ( trochanteric fossa ) |
| function |
| Outward rotation of the thigh |
| Innervation |
| Sacral plexus |
| Spinal segments |
| L4-S1 |
The musculus gemellus superior ( Latin for "upper twin muscle ") is one of the skeletal muscles of the thigh in the area of the hip. It arises on the ischial spine ( spina ischiadica ) of the ischium . The musculus gemellus superior lies directly above its "twin", the musculus gemellus inferior . It is a very narrow muscle and attaches itself from above to the end tendon of the obturator internus muscle and starts in the trochanteric fossa of the thigh bone.
In most quadruped mammals , the two twin muscles are fused together to form a single muscle, but from a comparative anatomical point of view, they are referred to in the plural form - Musculi gemelli . In cats , as in primates, both muscles are separate.
function
The musculus gemellus superior acts on the hip joint , where it causes an external rotation (Rotatio externa) around the longitudinal axis, an adduction and a stretching (extension, also called retroversion).
Individual evidence
- ↑ Ulrike Bommas-Ebert, Philipp Teubner, Rainer Voß: short textbook anatomy: and embryology . 3. Edition. Georg Thieme Verlag, Stuttgart 2011, ISBN 978-3-13-151793-7 , p. 210.
- ^ Franz-Viktor Salomon et al .: Anatomy for veterinary medicine . 3. Edition. Enke, Stuttgart 2015, ISBN 978-3-8304-1288-5 , pp. 234-235 .