Which of the following is NOT a characteristic of synarthrodial joints?

Synarthrodial joints are defined by their lack of movement, which is a key characteristic that distinguishes them from other types of joints. These joints are typically connected by dense connective tissue or cartilage, and they are known for being immovable or allowing only very minimal movement.

The reason "allow for significant movement" is not a characteristic of synarthrodial joints is that these joints are specifically designed to maintain stability and support. For instance, joints like the sutures in the skull are synarthrodial and provide protection for the brain by not allowing movement. In contrast, joints that allow significant movement, such as synovial (diarthrodial) joints, are designed to facilitate a wide range of motion, which is fundamentally different from the role of synarthrodial joints.

In summary, the defining trait of synarthrodial joints revolves around their lack of movement, which is why the option related to significant movement does not align with their characteristics.