An immovable joint is called what?

An immovable joint is called what?

• A. Synarthrosis
• B. Amphiarthrosis
• C. Diarthrosis
• D. Syndesmosis

Answer: (A)

An immovable joint is described by the functional category synarthrosis. These joints are tightly bound, usually by fibrous tissue, so there is essentially no detectable movement between the bones. Classic examples include the sutures of the skull and the teeth in their sockets (gomphosis). In contrast, amphiarthroses allow only slight movement, such as the joints between the vertebrae or the pubic symphysis, while diarthroses are freely movable and include most synovial joints like the knee and elbow. Syndesmosis refers to a specific fibrous joint held together by ligaments, which typically permits little to some movement but is a distinct type of joint rather than the general term for immobility.

An immovable joint is described by the functional category synarthrosis. These joints are tightly bound, usually by fibrous tissue, so there is essentially no detectable movement between the bones. Classic examples include the sutures of the skull and the teeth in their sockets (gomphosis).

In contrast, amphiarthroses allow only slight movement, such as the joints between the vertebrae or the pubic symphysis, while diarthroses are freely movable and include most synovial joints like the knee and elbow. Syndesmosis refers to a specific fibrous joint held together by ligaments, which typically permits little to some movement but is a distinct type of joint rather than the general term for immobility.