Sartorius muscle
| Sartorius muscle |
|---|
|
| anterior thigh muscles |
| origin |
| Pelvis (anterior upper iliac spine, anterior superior iliac spine ) |
| approach |
| Pes anserinus superficialis |
| function |
| Hip joint : flexion, external rotation, abduction. Knee joint : flexion, internal rotation |
| Innervation |
| Femoral nerve |
| Spinal segments |
| L2, L3 |
The sartorius muscle ( Latin for "tailor's muscle ") is one of the anterior skeletal muscles of the thigh . The slender muscle runs from the anterior superior iliac spine on the iliac bone of the pelvis over the front and inside of the thigh to the inside of the tibia , more precisely to the pes anserinus superficialis .
In dogs , the muscle consists of two parts ( pars cranialis and pars caudalis ), in ruminants it has two heads . In animals for slaughter, the muscle is part of the upper shell .
function
The main function of the sartorius muscle is to flex the hip joint . In addition, he flexes the knee joint . It is the only muscle that can flex both in the hip joint and in the knee joint of humans: all other two-jointed hip flexors extend in the knee joint. Although it lies on the front of the thigh and thus on the extensor side, this is made possible by the fact that the insertion is guided through the fascia lata behind the pivot point of the knee joint. In addition, he pulls the thigh outwards ( abduction ) and turns the lower leg inwards. In counteraction by the abductors of the hip joint, it allows simultaneous execution of thigh rotation and flexion of the knee joint and the taking of Schneider's seat , which is its name to the muscle. In this position, the muscle is maximally tense and shortened.
Individual evidence
- ↑ a b Walther Graumann: Compact Textbook Anatomy . tape 2 . Schattauer, Stuttgart 2004, ISBN 978-3-7945-2062-6 , pp. 169-170 .
- ↑ Hermann Bragulla: anatomy of domestic mammals: textbook and color atlas for study and practice . Schattauer, Stuttgart 2009, ISBN 978-3-7945-2650-5 , p. 256 .
- ↑ Franz-Viktor Salomon: muscle tissue . In: Anatomy for veterinary medicine . Enke Stuttgart, 2004, pp. 147-234. ISBN 3-8304-1007-7
- ↑ Michael Schünke: Functional Anatomy - Topography and Function of the Movement System . Georg Thieme, Stuttgart 2000, ISBN 978-3-13-118571-6 , p. 344 .