Poor prefrontal development is mainly manifested by the following symptoms: 1. Patients with poor prefrontal development may experience mental retardation or memory loss. Some patients also have symptoms of mental excitability, manifesting as euphoria and unrestricted behavioral activities.2. Patients may also have focal seizures or epileptic status, and some patients may easily forget.3. If the central parietal lobule of the prefrontal lobe is damaged, patients may also have weakness of both lower limbs with urinary and fecal dysfunction, and some patients may also have hemiplegia of one limb or unstable walking, walking wobbly, etc. Ataxia, some patients with damage to the left prefrontal lobe will have motor aphasia and slurred speech.