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Date:** โค โ[[2025-04-05-Satใ๐ง Brain Network - DMN vs TPNใ]]โ
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### ๐ง 1. What is the **Default Mode Network (DMN)** ้ป่ฎคๆจกๅผ็ฝ็ป?
- The DMN is a network of brain regions active **when the mind is at rest**, not focused on external tasks.
- It includes the **medial prefrontal cortex (mPFC)**, **posterior cingulate cortex (PCC)**, and **angular gyrus**.
- Responsible for:
- Daydreaming, mind-wandering
- Internal monologue & self-referential thought
- Rumination & future simulation
- Autobiographical memory
**โ ๏ธ Hyperactivity of DMN is linked to:**
- Anxiety & depression
- ADHD
- Intrusive thoughts & overthinking
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### ๐ง 2. What is the **Task Positive Network (TPN)** ไปปๅกๆง่ก็ฝ็ป?
- TPN is a brain network activated during **goal-directed, externally focused tasks**.
- It involves the **dorsolateral prefrontal cortex (DLPFC)**, **intraparietal sulcus**, and **supplementary motor areas**.
- Responsible for:
- Attention control
- Decision making
- Planning & working memory
- Executive function
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### ๐ DMN vs TPN Comparison
| **Aspect** | **DMN (้ป่ฎคๆจกๅผ็ฝ็ป)** | **TPN (ไปปๅกๆง่ก็ฝ็ป)** |
|-----------------------------|------------------------------------------|------------------------------------------|
| State | Resting / Passive | Active / Task-focused |
| Thought type | Introspective, emotional, narrative | Analytical, goal-directed |
| Common activity | Daydreaming, rumination, imagination | Solving problems, focused attention |
| Hyperactivity linked to | Anxiety, depression, ADHD | โ |
| Balance mechanism | Ideally toggles between DMN & TPN | TPN suppresses DMN during deep focus |
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### ๐ง How to Regulate DMN Overactivity
- ๐งโโ๏ธ **Meditation** โ trains the brain to observe thoughts without attachment
- ๐ **Exercise** โ boosts executive function and reduces rumination
- ๐ฏ **Deep work (flow state)** โ fully engages TPN and "quiets" DMN
- โ๏ธ **Journaling / Cognitive therapy** โ externalizes and organizes inner chatter
- โ **Limit social media / multitasking** โ overstimulates DMN
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### ๐ฌ Research Notes
- fMRI shows inverse relationship between DMN & TPN: as one goes up, the other goes down.
- People with ADHD show **increased DMN activity even during task performance**.
- Regular mindfulness practice can **reduce DMN dominance** and enhance task switching.
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### ๐ก Summary
> "The key to mental clarity is learning when to rest the DMN and ignite the TPN."
- The brain naturally toggles between DMN and TPN.
- A **healthy balance** is essential for creativity, productivity, and emotional regulation.
- **Overactive DMN = mental noise**. Activating TPN can rewire focus & resilience.