Which joint type is typically immovable and found in the skull?

Which joint type is typically immovable and found in the skull?

• A. fibrous joints
• B. cartilaginous joints
• C. synovial joints
• D. hinge joints

Answer: (A)

Fibrous joints are the joints that hold the skull bones together. They are made of dense connective tissue, have no joint cavity, and allow very little movement. In the skull, the sutures are fibrous joints that lock the bones firmly in place to protect the brain. As we grow, some sutures gradually fuse, making the skull even more rigid. In infants, fontanelles are present where sutures aren’t yet fused, allowing some flexibility for birth and growth, but they eventually ossify and movement remains minimal. Cartilaginous joints involve cartilage and usually allow slight movement. Synovial joints are movable and have a joint cavity, with hinge joints being a type of synovial joint that can bend and straighten.

Fibrous joints are the joints that hold the skull bones together. They are made of dense connective tissue, have no joint cavity, and allow very little movement. In the skull, the sutures are fibrous joints that lock the bones firmly in place to protect the brain. As we grow, some sutures gradually fuse, making the skull even more rigid. In infants, fontanelles are present where sutures aren’t yet fused, allowing some flexibility for birth and growth, but they eventually ossify and movement remains minimal.

Cartilaginous joints involve cartilage and usually allow slight movement. Synovial joints are movable and have a joint cavity, with hinge joints being a type of synovial joint that can bend and straighten.