Helical dynamic processes and structures can, for example, be observed in vortexes, mussels and snail shells. But we also encounter this concept within the human organism. Also, the arrangement and function of the muscles used as a basis for walking straight represent this principle. The French physiotherapists S. Piret and M. Beziers developed the principles for the concept. The physician Dr.
The basis of the three-dimensional, helical screw-type connection is caused by the mutual rotation of two poles. This self-explanatory principle at a first glance proves to be a complex, three-dimensional structural and functional principle for the human body when observed more closely.
Here, the muscles determine the direction of movement. Thus, walking functions as a principle of counter-rotation of the pelvis and upper body, i. Here, the chest is screw-connected in an opposing direction and pendular movement of the arm results. Also, swimming movement for crawl follows this principle and equally all throwing and impact movements. The helical screw-type connection of the human foot probably arose during the course of the development from primates to human beings, i.
To this end, the arch of the foot was formed. Thanks to the helical structure, it is elastic and at the same time stable when stressed and adapts to unevenness of the ground and various pressure situations to which the foot is subjected when walking.
So, whilst the back of the foot is stable, the metatarsal and the arch of the foot are mobile, enabling them to ensure the necessary balance inward and outward rotation. The elastic forefoot cushions the weight when walking. Functional influences include, for example, the hallux valgus, skew and splayfoot also with fallen arches , inflammation of the plantar fascia tendon layers of the sole of the foot and heel spur, but also hammer and claw toes and pressure sores on the feet resulting from their deformation.
