Flexor hallucis brevis muscle
| Flexor hallucis brevis muscle |
|---|
|
| Sole muscles of man |
| origin |
| v. a. Os cuneiform intermedium |
| approach |
| Basic phalanx of the big toe (both heads) and medial sesamoid bone (for the medial head) or lateral sesamoid bone (for the lateral head) of the big toe |
| function |
| Flexion (plantar flexion) of the big toe |
| Innervation |
| Branches of the tibial nerve : medial plantar nerve (for the medial head) and lateral plantar nerve (for the lateral head) |
| Spinal segments |
| S1, S2 |
The flexor hallucis brevis muscle ( Latin for “short big toe flexor ”) is a skeletal muscle in the area of the underside of the foot skeleton. It is divided into a lateral (outer) and a medial (inner) muscle belly.
origin
The origin lies essentially in the area of the middle sphenoid bone ( Os cuneiforme intermedium ). In addition, the muscle also arises from the following structures:
- Inner sphenoid bone (os cuneiforme mediale)
- External sphenoid bone (os cuneiforme laterale)
- Long sole ligament ( ligamentum plantare longum )
- Plantar calcaneocuboid ligament
- Posterior tibial tendon (tibialis posterior muscle)
approach
The flexor hallucis brevis muscle is divided into a lateral and a medial muscle belly:
- The lateral part attaches to the lateral sesamoid bone of the capsule of the metatarsophalangeal joint and the base of the metacarpus of the great toe.
- The medial part starts at the medial sesamoid bone of the capsule of the metatarsophalangeal joint and the base of the metacarpus of the great toe.
function
The flexor hallucis brevis muscle bends the big toe in the metatarsophalangeal joint (joint close to the body).