Musculus fibularis tertius
| Peroneus tertius muscle |
|---|
|
| anterior lower leg muscles of man |
| origin |
| lower outer third of the fibula , interosseous membrane |
| approach |
| Base of the 5th metatarsal |
| function |
| Dorsiflexion and pronation of the ankle |
| Innervation |
| Deep peroneal nerve |
| Spinal segments |
| L5, S1 |
The peron (a) eus tertius muscle ( Latin for "third fibula muscle "), also called fibularis tertius muscle , is a skeletal muscle of the lower leg . It is a splitting off of the extensor digitorum longus muscle , the tendon of which reaches the outer edge of the foot .
In the predators , the muscle is completely absent. In the horse it is purely sinewy ( Tendo femorotarseus ) and part of the tension saw construction .
function
The peronaeus tertius muscle is involved in the dorsiflexion of the ankle . So it causes the "pulling up" of the foot. It also supports the lifting of the outer edge of the foot ( pronation ).
In animals - with the exception of predators and horses - it acts as a flexor of the ankle and auxiliary extensor of the knee.
Varieties
In 10.5% of all cases the peronaeus tertius muscle is completely absent in humans.
literature
- Franz-Viktor Salomon: musculoskeletal system . In: Franz-Viktor Salomon et al. (Ed.): Anatomy for veterinary medicine . Enke, Stuttgart 2004, ISBN 3-8304-1007-7 , pp. 22-234.
Individual evidence
- ^ Joshi et al .: Morphology of peroneus tertius muscle. Clinical anatomy, 2005, accessed April 11, 2013 .