FOOT MUSCLES (intrinsic muscles)
The muscles acting on the foot can be divided into extrinsic & intrinsic muscles. = hand
- Extrinsic muscle : muscles that originate outside of a specific region and insert onto structures within that region.
- Intrinsic m : originate & insert onto the same region.
Dorsal compartments :
Planter Compartment :
1st layer :
"AFA"
2nd layer :
Dorsal muscles (intrinsic)
Dorsal muscles (extrinsic)
1st layer :
2nd layer :
3rd layer :
"FAF"
4th layer :
FOOT FASCIA
The fascia of the leg continues down and form a thickened fascia, band of fibers that protects and organize the tendons going down to the foot. these band called Retinaculum.
1. Superior Extensor Retinaculum
2. Inferior Extensor Retinaculum :
form 4 canals for the tendons of the extensor muscles :
- 1st canal → tendons of tibialis anterior
- 2nd canal → Extensor Hallucis longus
- 3rd → Dorsalis Pedis art. / vein & fibular n.
- 4th → Extensor Digitorum Longus
3. Flexor Retinaculum (on the medial side)
forms 4 canals :
- 1st → tendons of tibialis posterior
- 2nd → tendons of flexor digitorum longus
- 3rd → tibialis posterior art. / vein & tibial n.
- 4th → tendons of flexor hallucis longus
4. Superior & inferior fibular Retinaculum (lateral side)
they contain tendons of the fibularis longus & fibularis brevis
- Planter Aponeurosis (Planter side)