The normal anatomical structure of the entire lumbar vertebral body and the posterior pedicle, vertebral plate, etc. are interconnected to form a complete spinal canal, and the main purpose is to protect the spinal cord and nerves inside. If there is occult spina bifida in this area, it means that the entire vertebral plate or pedicle area is not fully developed and is surrounded by corresponding structures such as muscles or soft tissues, which will weaken the protection of the spinal cord compared to the normal bony structure and will gradually worsen over time, possibly leading to symptoms of nerve damage, such as bedwetting and other related problems.