Emonthebrain

A Dysregulated Nervous System Makes You Dumber - Here’s How to Fix It

19 snips
Mar 30, 2026
Neuroscience of why stress makes your brain less sharp and how an overactive amygdala sidelines the thinking brain. The difference between automatic reacting and mindful responding is explored. How stress warps perception and drives threat-scanning. Practical micro-habits to restore calm, from slowing down and boundary-setting to vagus-nerve humming, presence practice, and joy-driven play.
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INSIGHT

Dysregulation Literally Makes You Dumber

  • A dysregulated nervous system reduces intelligence in real time by increasing amygdala activity and decreasing prefrontal cortex activity.
  • Emily McDonald explains this causes worse focus, memory, impulsivity, and inability to act like your best self during stress.
INSIGHT

Reactions Are Old Automated Programs

  • Reactions are automated programs from past versions of you and equal running old patterns instead of choosing new responses.
  • Emily argues creating a new future requires responding (deliberate action) not reacting (fear-driven autopilot).
ADVICE

Don't Trust Stressed Thinking

  • Treat stress-distorted thoughts as unreliable until you return to calm; only trust decisions when you're at least at neutral.
  • Emily notes stressed brains scan for threat and 'lies' that exaggerate risk even when you logically know things are fine.
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