What primarily characterizes DCS Type 2?

Diving Decompression Sickness (DCS) is categorized into two types based on the symptoms and the areas of the body affected. DCS Type 2 is primarily characterized by the formation of nitrogen bubbles in neurological tissues. This type of DCS can result in serious neurological symptoms, such as paralysis, seizures, or loss of consciousness, as these bubbles can disrupt blood flow and proper function of the nervous system.

The involvement of neurological tissues is critical in understanding why DCS Type 2 is distinct from Type 1, which typically affects the musculoskeletal system and involves joint pain and tenderness due to bubble formation in the muscles and joints. This distinction is important for diagnosis and treatment, emphasizing the need for immediate medical attention when neurological symptoms are present, as they indicate a more severe form of decompression sickness.

Therefore, the correct answer highlights the primary characteristic of DCS Type 2, which is the involvement of nitrogen bubbles in the neurological system, leading to potential life-threatening complications.