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Pivot joint, in vertebrate anatomy, a freely moveable joint that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament. Learn more about pivot joints in this article.
Pivot joints are one of six types of synovial joints along with plane joints, ellipsoid joints, hinge joint s, ball and socket joints and saddle joints. Pivot joints got their name primarily for the movement they allow – pivoting (i.e. a shaft/axis upon and about which something rotates).
In animal anatomy, a pivot joint (trochoid joint, rotary joint or lateral ginglymus) is a type of synovial joint whose movement axis is parallel to the long axis of the proximal bone, which typically has a convex articular surface.
Pivot Joint Definition. Pivot joints are joints that permit rotatory movement of bones, around a single axis. Pivot joint is a synovial joint in which the ends of two bones connect. In this joint, a cylinder-shaped bone rotates inside another ligament that forms a ring around the joint.
The meaning of PIVOT JOINT is an anatomical articulation that consists of a bony pivot in a ring of bone and ligament (as that of the dens and atlas) and that permits rotatory movement only —called also trochoid.
Pivot Joint. At a pivot joint, a rounded portion of a bone is enclosed within a ring formed partially by the articulation with another bone and partially by a ligament (see Figure 9.4.3a). The bone rotates within this ring. Since the rotation is around a single axis, pivot joints are functionally classified as a uniaxial diarthrosis type of joint.
A pivot joint is a synovial joint in which the ends of two bones meet—one end being a central bony cylinder, the other end being a ring (or ring-like structure) made of bone and ligament. In some joints, the cylinder rotates inside the ring.
Pivot joints, also known as trochoid joints, are a type of synovial joint that allows for rotational movement around a single axis. They enable a limited range of motion, primarily rotation, and are essential for various body movements and functions.
The atlantoaxial joint, formed by the 1st (atlas) and 2nd (axis) cervical vertebrae, is a pivot joint. The atlantoaxial joint permits side-to-side head motion. Another example is the proximal radioulnar joint.
a synovial joint in which a section of a cylinder of one bone fits into a corresponding cavity on the other, as in the proximal radioulnar joint. Synonym (s): articulatio trochoidea [TA], helicoid ginglymus, lateral ginglymus, rotary joint, rotatory joint, trochoid articulation, trochoid joint.