[Screenshot_20251212-223742_Pixel 启动器] 
thinking silently...

Here's a thinking process that leads to the detailed explanation of the catastrophic consequences of excitotoxicity in a 7-year-old brain:

1.  **Analyze the User's Request:**
    *   **Core Subject:** The consequences of massive cell death (excitotoxicity) in a 7-year-old developing brain due to lack of sleep/synaptic downscaling.
   ...