What are the three main joint types in the body?
1) Synarthroses or immovable joints. There are four subtypes: sutures such as the union of the skull bones, gomphosis as the union of the root of a tooth to the jaw, schindylesis where a thin plate is received into a cleft or fissure such as the rostrum of the sphenoid into the perpendicular plate of the ethmoid, and synchondroses where a temporary form of cartilage forms a joint with adjoining bone, such as the growth plates of growing children. Synchondroses generally disappear before adulthood. 2) Amphiarthroses are divided into two subtypes and allow slight movement. A symphysis is two bones connected by flattened disks of fibrocartilage, such as the symphysis between the right and left pubic bones or the right and left lower jawbone. A syndesmosis is two bones connected by an interosseous ligament, such as the joint between the distal tibia and fibula. 3) Diarthrodial joints are the most common also termed synovial joints. The contiguous joint surfaces are covered by cartilage, of
Probably the first three here are what you are after, though there appear to be four main types. What are the different types of joints? There are many types of joints, including joints that do not move in adults, such as the suture joints in the skull. Joints that do not move are called “fixed.” Other joints may move a little, such as the vertebrae. Examples of mobile joints include the following: ball-and-socket joints Ball-and-socket joints, such as the shoulder and hip joints, allow backward, forward, sideways, and rotating movements. hinge joints Hinge joints, such as in the fingers, knees, elbows, and toes, allow only bending and straightening movements. pivot joints Pivot joints, such as the neck joints, allow limited rotating movements.
Functional classification Joints can also be classified functionally, by the degree of mobility they allow: * synarthrosis – permits little or no mobility. Most synarthrosis joints are fibrous joints. * amphiarthrosis – permits slight mobility. Most amphiarthrosis joints are cartilaginous joints. * diarthrosis – permits a variety of movements. All diarthrosis joints are synovial joints, and the terms “diarthrosis” and “synovial joint” are considered equivalent by Terminologia Anatomica. There are six types of synovial joints. (1) Gliding joints (or planar joints). A gliding joint (arthrodial joint, plane articulation) is a synovial joint which admits of only gliding movement. (2) Hinge joints. In the hinge joint (ginglymus), the articular surfaces are moulded to each other in such a manner as to permit motion only in one plane, forward and backward, the extent of motion at the same time being considerable. (3) Pivot joints. Pivot joint (trochoid joint, rotary joint): Where the movement
