The arch consisting of tarsal and metatarsal bones, as well as tendons and other elastic and folding mechanisms on the sole of the foot protrudes upward. It can be divided into longitudinal arch and transverse arch. The primary function of the arch of the foot is to disperse gravity from the knee joint to the metatarsal bone through the talus, and then introduce it backward to the ankle fracture to ensure the stability of the plantar support point when standing upright.
The primary function of the arch of the foot is to disperse gravity from the knee joint to the metatarsal capitulum through the talus, and guide the ankle fracture backwards to ensure the firmness of the plantar support point when standing upright. When the body bounces or falls from the air and touches the ground, the elasticity of the arch plays a vital role in buffering the swing. When walking, especially when crossing mountains and rivers, the elasticity of the arch can adjust the rhythm between the gravity transmission of the body and the resilience of the road. At the same time, it also has the function of keeping the plantar capillaries and nervous system from being squeezed. The arch of foot is maintained by cuneiform bone, and the elasticity and stretching reflex of tendon make tendon anxious. The latter is the movement element to keep the arch of the foot. For example, tendon or systemic muscle (tendon) injury, congenital subcutaneous tissue hypoplasia or foot bone fracture can all cause arch collapse, leading to flat feet.
The arch of the foot is used to ensure the firmness of the supporting point of the sole when standing upright, transfer the body gravity to the ankle fracture and metatarsal capitulum when walking, and protect the capillaries and nervous system of the sole from being squeezed. The elasticity of arch and tendon and the aggregation of plantar muscles are the dynamic standards to keep the arch and its feet jumping. Jumping to the ground can adjust the rebound of the road surface. If the function of the arch is destroyed, the posture of standing upright, walking and jumping will be endangered.