Tibialis posterior
The Fibularis Longus and Fibularis Brevis
fibularis longusflexes and Evert the footFibularis brevis and Fibularis longus
The bottom of the foot is called the plantar surface. Plantar flexing is contracting the muscles of the foot so that the toes move down and the arch increases.
The action of the calcaneal tendon is to allow your soleus and gastrocnemius muscles to (plantar) flex your foot.
Plantar flexion is the act of flexing the muscles of the toe and foot toward the sole. the muscles involved in this process are often stretched which for some, can reduce heel pain and the pain caused by flat feet.
When you walk, there is plantar-flex-ion. So main function of foot is walking. So for planter-flex-ion you need more movement and power to lift the body weight. Power is provided by powerful muscles, those are Gastrocnemius and Sole-us muscles. (Calf muscles.) For Dorsiflexion you do not require much range of movement and power to lift a small body part, that is foot itself only.
The Gastrocnemius and the Soleus flexes the knee and the foot. The Plantaris is an unimportant muscle. Many people do not have it and doctors tend to use this muscle for tendon graphs.
Tibial nerves main function is to plantar flex and invert the foot
Peroneus (fibularis) longus muscle and Peroneus (fibularis) brevis muscle
tibialis anterior
The gastronemius muscle is one of the calf muscles and it plantar flexes the foot or flexes the knee.
Plantar aspect of the foot basically means on the sole of the foot.
The plantar fascia muscles are those located in the foot that control heel movement. One of the easiest exercises is to stand on a low curb with just the toes and raise and lower ones heels above and below the curb.