They may move in a variety of ways in order to speed of the process of the molting occurrence. Contracting their muscles and flinging their bodies, sidewinders create an S-shape that only has two points of contact with the ground; when they push off, they move laterally. This is what prevents the snake from slipping.
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Snake Locomotion, snake locomotion: sidewinding, source: Wikimedia Commons; Author: Jos Reynaldo da Fonseca (2007). The key to snakes' agility - hundreds of vertebrae and ribs - is closely related to the key to their locomotion: ventral scales. Contents, introduction, since snakes lack limbs locomotion is very different to most other vertebrates. The snake extends its head and the front of its body along the vertical surface and then finds a place to grip with its ventral scales. For information on snake physical examinations, see here. Starting at the neck, a snake contracts its muscles, thrusting its body from side to side, creating a series of curves. When a snake uses caterpillar movement, the tops of each curve are lifted above the ground as the ventral scales on the bottoms push against the ground, creating a rippling effect similar to how a caterpillar looks when it walks. There are plenty of videos online that show snakes in the various types of locomotion.
There are several methods of locomotion that a snake may use for moving its body around. If you get a chance you should watch them. This type of movement also transition of Gender Roles from past to present helps when they are underground in a tunnel. They need to be able to get that skin off as it is dry and itchy. Locomotion is produced by different types of movement based on absence or presence of contact between the animal's body and the medium through which the snake is moving. For information on the snake musculoskeletal system, see here. Concertina - The previous methods work well for horizontal surfaces, but snakes climb using the concertina technique. By moving in various directions they can create small tears. They rely on the muscles around the stomach to move them. Muscle activity during concertina locomotion correlated either with lateral flexion towards the side of the active muscle or with the maintenance of static contact with the sides of a tunnel.