The document describes the four layers of muscles in the sole of the foot. The first layer contains four muscles including the abductor hallucis. The second layer contains seven muscles including the flexor hallucis longus and flexor digitorum longus. The third layer contains three muscles. The fourth and deepest layer contains nine muscles including the tibialis posterior, peroneus longus, and interossei muscles. The plantar aponeurosis connects many of the muscles and continues into the deep fascia on the top of the foot.

2. PLANTAR APONEUROSIS
Deep transverse
Metatarsal ligament
Plantar aponeurosis
(Central part)
Continues as
Flexor retinaculum
Continues as
Deep fascia of
dorsum of foot
A
B
D
R
H
A
L
A
B
D
D
I
G
M
I
N
Continues as
Deep fascia of
dorsum of foot

3. FIRST LAYERSole of foot
4 layers
Abd. hallucis
Flex.Dig.Brevis
Abd. Dig. Minimi
3 Muscles

4. SECOND LAYER
Flex.Hal.
Longus
Flex.Dig. Longus
Flex.Dig.
Accessorius
Lumbricals
7 Muscles

5. THIRD LAYER
Flex.Hal.Brevis Flex.Dig.Min.
Brevis
Add. Hallucis
3 Muscles

6. FOURTH LAYER
9 Muscles
Tibialis Posterior
Peroneus Longus
3.Plantar Interossei
4.Dorsal Interossei

7. Flexor Retinaculum
Ext. Hallucis Longus
Tibialis
Posterior
Flex. Dig.
Longus
Flex. Hallucis Longus

8. Tibialis Posterior
Flex.Dig.Longus
Post Tibial art.
Tibial Nerve