Concertina movement is the method by which a snake or other organism anchors itself with sections of itself and pulls or pushes with other sections to move in the direction it wants to go. To spring forward a snake may require a rough surface to thrust back against.

For several decades different types of snake locomotion have been categorized as one of four major modes: rectilinear, lateral undulation, sidewinding, and concertina. Recent empirical work shows that the scheme of four modes of snake locomotion is overly conservative.

2020年12月15日 · While other snake movement methods work great on flat, horizontal surfaces, the concertina motion is how snakes manage to climb. The grip of its scales when it braces itself is strong enough to hold onto a vertical surface.

Concertina locomotion is used in crawling through tunnels or narrow passages and in climbing. In concertina locomotion, blocks of muscles are activated simultaneously, and unilaterally, in regions of bending and of static contact with the sides of a tunnel.

Concertina locomotion is used when there is not enough frictional resistance along the locomotor surface for serpentine locomotion. After the body is thrown into a series of tight, sinuous loops, forming a frictional anchor, the head slowly extends forward until the body is…

When a grass snake moves over a relatively smooth and uniform surface its mode of progression tends to be irregular, and serpentine movement is replaced either by side-winding, or by concertina movement, or a combination of the two.

concertina movement — a principle of table construction in which hinged sections of the frame, ordinarily folded inward out of sight, can be pulled into line with the parts of the frame ordinarily seen to permit the addition of leaves. Also called concertina action.

2020年4月9日 · For several decades different types of snake locomotion have been categorized as one of four major modes: rectilinear, lateral undulation, sidewinding, and concertina. Recent empirical work shows that the scheme of four modes of snake locomotion is overly conservative.

2025年1月5日 · One of these is known as “concertina” locomotion, because the snake in action resembles the opening and closing of an accordion or a concertina. First the tail and the posteriormost part of the body are securely anchored, and then the head and the rest of the body are extended as far forward as possible from that secure base.

Snakes move through crevices using sequential folding and unfolding of their bodies in the manner of an accor-dion orconcertina. In this combined experimental and theoretical investigation, we elucidate this effective means of moving through channels.