What is a joint in anatomy?

A joint (also called an articulation or arthrosis) is the junction between two or more bones. Its primary function is to enable movement, though some joints are immovable.

What are the main functional classifications of joints?

Joints are classified functionally based on mobility into three types: Synarthroses (immovable, e.g., cranial sutures), Amphiarthroses (slightly movable, e.g., pubic symphysis), and Diarthroses (freely movable, e.g., synovial joints).

What are the structural classifications of joints?

Structurally, joints are grouped by connective tissue and joint cavity presence: Fibrous joints (bones connected by fibrous tissue, no cavity), Cartilaginous joints (bones joined by cartilage, no cavity), and Synovial joints (bones separated by a fluid-filled cavity, allowing free movement). This classification is most common in clinical practice.

What is the difference between synarthroses and diarthroses?

Synarthroses are immovable joints with no movement, like cranial sutures. In contrast, diarthroses are freely movable joints that permit maximum movement, such as most limb joints.

What is arthritis in relation to joints?

Arthritis is a term for inflammation of the joints, which can affect their function and cause pain or stiffness.

What is a dislocation of a joint?

A dislocation occurs when there is a partial or complete loss of contact between the articulating bones in a joint, often due to injury.

Joints (Articulations) – Classification & Types