Example of syndesmosis joint is: September 2007
Ans. B: Tibiofibular Joint I. Six types of synol joints are: Hinge Ball-and-socket Pivot Condyloid (angular or ellipsoidal) Plane (gliding) Saddle. - The elbow is an example of a hinge joint. Here, the convex and concave aiculating bones allow movement along one plane, similar to a door. -The shoulder and hip are the only ball-and-socket joints in the body. In this type of joint, one bone has a spherical head that aiculates with a corresponding concavity. This joint frees the joint to move in many directions. - In a pivot joint, one round-shaped aiculating bone fits within a corresponding depression on another bone. This joint allows one bone to rotate against the other. An example is the radioulnar joint (joint of the radius and ulna) in the forearm. - In a condyloid (angular) joint, one bone has an oval aiculating head that rests within an oval concavity. This joint permits angular movement of the bones. The metacarpophalangeal joint (junction between the metacarpals and phalanges) of the hand are examples of condyloid joints - Plane joints have two flat bones joined. The sole movement of the bones is sho gliding motions. An example of this joint is the intearsal joint (junction between the tarsal bones) of the feet. Saddle joint bones have convex and concave surfaces similar to a saddle. This joint allows the joint to move in many directions. The carpometacarpal joint of the thumb is an example saddle joint. II. As their name implies, amphiahrosis joints (slightly movable joints) have limited movement. The two types of amphiahrosis joints are: Syndesmosis (fibrous) Symphysis (cailaginous). - A Syndesmosis joint occurs when two bones join by a section of cailage. The junction between the tibia and fibula is an example. A symphysis joint forms when two bones fuse by a fibrocailage pad. Typical symphysis joints are between the pubic symphysis (pubic bones in the pelvis), and in the veebral column between individual veebrae. Interveebral discs act as weight-bearing shock absorbers for walking, jumping, and lifting. III. An immovable joint is called a synahrosis. The two types of this joint are: Sutures Gomphoses. - Sutures are joined by sho fibers of dense fibrous connective tissue and are in the skull. - The single example of a gomphosis joint is the teeth sitting within their sockets. IV. An example of a bony fusion joint is the fusion of the three bones forming a coxa (hip bone): the ilium, ischium, and pubis.
Tibiotalar joint
Tibiofibular joint
Elbow joint
Carpometacarpal joint