How the Nervous System Impacts CEO Decisions: The Two Operating Systems Every Leader Runs On
The word “sympathetic” sounds like exactly what you want in a leader.
Sympathetic. Caring. Attuned.
But in neurology, “sympathetic” means something very different. It means your brain is so activated, so triggered, that it is mobilizing your entire body for a fight.
Your chest tightens. Your thoughts speed up. Patience shortens. You interrupt more. And there is this urgency to make a decision yesterday, which means you are about to bypass the smartest part of your brain.
That is not leadership.
That is survival wearing a suit.
Your nervous system determines whether your prefrontal cortex is online or offline when you make your most consequential calls. The prefrontal cortex handles planning, risk assessment, and relational judgment. Research shows that stress hormones suppress our smart brain and shift processing to the amygdala, where everything becomes fast, reactive, and threat-biased. (Sympathetic, right?!)
With 56% of leaders reporting burnout and 73% of C-level executives working without sufficient rest, most leaders are making their highest-stakes decisions from a biologically compromised state. And they don’t know it.
Your Leadership Has Two Operating Systems
When I explain this to leaders, I never use the clinical terms first. They are too complicated and they sound too far from the boardroom.
What I tell them is this: your nervous system has two primary modes. Both are normal. Both are useful. But they produce very different leadership.
Regulated Mode (Ventral State)
This is the ideal state for leadership. It means there is a live connection between the instinctual part of your brain and the cognitive part. The really smart part. Your brain is integrated. It has a high capacity for difficult interactions.
In leadership, this feels like:
- You can disagree with someone without your body having a threat response.
- You can hear feedback without getting defensive.
- You stay curious. You ask questions.
- You respond instead of react.
Reactive Mode (Sympathetic State)
This is your brain’s mobilization circuit. It fires when your body believes something is at risk. Your reputation. Your performance. Your control. Your belonging.
In leadership, this feels like:
- Your chest tightens. Your thoughts race.
- Patience disappears. You interrupt.
- There is an urgency to solve it now, and that urgency bypasses the part of your brain that could actually solve it well.
From the outside, people experience this type of leadership as intense, controlling, and hard to approach. Even when the leader’s intentions are good, the nervous system is signaling danger. And everyone in the room can feel it.
| Strategic Mode (Ventral) | Reactive Mode (Sympathetic) | |
| Brain state | Prefrontal cortex online. Planning, synthesis, relational judgment. | Amygdala-dominant. Threat detection, binary processing. |
| Decision quality | Nuanced, long-term, integrated | Rushed, short-term, narrowed |
| Risk assessment | Calibrated. Weighs multiple outcomes. | Skewed. Either over-cautious or impulsive. |
| Relational bandwidth | High. Can hold tension without rupturing. | Low. Defensiveness, withdrawal, or control. |
I want you to notice something about this table: none of this is about who you are. It is about what state you are in. It shifts, sometimes multiple times in a single meeting. And that is actually the good news. Because a state can be changed. A personality cannot.
Why Leaders Make Worse Decisions Under Pressure
Most leaders I work with believe they perform better under stress. They wear the pressure like a badge.
The research says otherwise.
A meta-analysis of 51 studies found that acute stress impairs working memory and cognitive flexibility. Those are the exact functions you need to hold competing priorities, integrate new information, and adapt your strategy in real time.
The hormonal sequence matters. Adrenaline fires within seconds of a perceived threat, producing tunnel vision and urgency. Cortisol follows, peaking about 20 minutes later and staying elevated for hours. This combination increases impulsive risk-taking, reduces risk perception, and biases the brain toward “high immediate gains over larger future losses.”
Now, acute stress can sharpen narrow, immediate decisions. That part is real. But it degrades the cognitive functions needed for complex, long-horizon, interpersonal leadership. Strategic synthesis. Relational judgment. Creative problem-solving. All of it gets worse.
You may be faster under pressure. You are measurably worse at leading.
And most leaders do not recognize when they are in it.
56% of leaders hit burnout in 2024, up from 52% the year before. 73% of C-level executives report working without adequate rest. Back-to-back meetings, constant context-switching, compressed decision cycles are neurologically activating conditions. They push the nervous system into reactive mode as a baseline meant for exceptions.
The standard leadership advice? Move fast. Be decisive. Show confidence.
The “Decisive vs. Reactive” Trap
Our world prizes the leader who makes quick choices and plows forward. That is what gets rewarded. And in some ways, that metric for leadership is pushing people deeper into their sympathetic nervous system.
We are a society that thinks in extremes.
Either you are quick and decisive, or you are stuck in analysis paralysis. Black or white. Fast or frozen.
But there is a messy middle. And that middle is where the best leadership lives.
You can be decisive. You can be assured. You can have confidence. But the best confidence comes from having heard the whole problem. From having understood. From having asked some questions before you moved.
This is the part I want every leader reading this to hear:
We want to be quick and decisive with our thinking brain, not with our survival brain operating out of fight or flight.
One produces clarity. The other produces speed that feels like strength but costs you the room.
How Your State Spreads Through the Company
When a leader is operating from their sympathetic nervous system, their team is going to feel the same thing. And they will feel it fast.
Our emotions are contagious. We have these things called mirror neurons in our brains, and they are constantly scanning the space, the atmosphere, the culture for safety. They are very sensitive to anything that feels off.
If a team member walks into the room and the leader is anxious, angry, or on a quick decisive tear, the staff’s brain will see it and feel it. Blood pressure rises. Muscles tighten. The staff starts to mirror what the leader is exhibiting.
A longitudinal study of over 5,000 employees found that manager stress creates measurable increases in employee stress levels. Those effects persist for a full year after the initial transmission.
Emotion runs both directions. But because the leader sets the tone, the leader’s impact on a team is exponentially higher than that of the team to the leader.
Which means how you come into the room is setting the regulatory temperature for everyone in it.
This is capacity work. Not strategy work. Not skill work. Capacity work that builds regulation to strategize and execute skillfully.
A dysregulated workplace feels like:
- Constant “missing the mark.” Goals are unclear or shifting.
- Filtered communication. People stop telling you what you need to hear.
- Defensive patterns. Feedback becomes a threat instead of data.
A regulated workplace feels different:
- Curiosity over defense. “How can I equip you?” instead of “Why did you fail?”
- Neuro-safety. People bring hard truths without fearing relational death.
- Decisions made in hours that used to take months.
This works both ways. Just like anxiety is contagious, regulation is contagious, too. When the leader brings a state of calm, operating from their thinking brain instead of their feeling brain, that becomes the new tone for the room.
What Regulated Leadership Actually Looks Like
People hear about emotional intelligence, about listening, about being the “regulated one.” And I think a lot of leaders hear that and wonder: does that mean I have to be soft? Passive? Do I have to slow that far down?
Absolutely not.
Having the capacity to sit in the discomfort of the challenges we face every day requires a level of strength that most people don’t have.
Ventral authority looks like this:
A leader who is strong enough to not be overwhelmed by the problem at hand. Who can hold it in one hand while considering all the options in the other.
A sympathetic leader needs to solve it right now because they don’t have the capacity to just hold it for a second.
That is not strength. That is a nervous system that has run out of gas.
- Sympathetic “decisiveness” = reactive, urgent, unable to tolerate ambiguity
- Regulated decisiveness = holds the problem, accesses the full brain, moves with clarity
Regulated leadership is integrated leadership. It acknowledges the urgency of an issue but accesses the smart part of the brain to make a logical, information-based decision. Not an emotional one.
How to Build Regulatory Capacity (You Cannot Do It Alone)
Leaders go to conferences. They go to leadership development. They learn that they need to be the regulated one. They need to set the tone.
And if you are a leader reading this, you are probably thinking: Yeah, I know. But how?
I will tell you the part that surprises most leaders: you need somebody else to come in and be the regulator for you so that you can then be that for others.
We can never do for others that which we have not experienced ourselves.
Our brains can only develop capacity in this area when we have experienced regulation from someone else first. That is not weakness. It is neuroscience. We are expecting leaders to produce regulation out of thin air, and that is not how brains work.
This is the capacity-building piece. This is the Brave Restoration work.
I worked with a team where the anxiety level was through the roof. The leader was a high-performing “everything needed to be done yesterday” driver. Their management team was in fight or flight constantly. One manager withdrew and froze. Another got hyped up trying to meet impossible expectations.
Nobody was working in the smart part of their brain. Decisions that should have taken an hour were dragging on for months.
After several months of capacity-building together, I showed up to their management meeting. The leader came in regulated. Calm. Present. For the next two hours, they hammered through a list of items that had been stalled for months. Clarity. Intention. Movement.
The next time they met without me? They all reported it didn’t go well.
And they were curious. Why?
Because they were still in process. Sometimes, having another person in the room to provide that steady presence while you are still building your own capacity is exactly what is needed. Leaders are people too. They are carrying more than anyone. And we are not providing them with the resources to grow this part of themselves. We are just expecting them to have it.
Over time, as the team had more and more experiences of this new way of interacting, their brains started to get the update. The meetings became productive even without me.
That is the rewiring. It only happens through repeated experience. Not through reading about it. Not through willpower. Through the body learning a new way to be in a room with other people.
THE ASK: What is your body doing right now as you read this? Is your chest tight? Are your thoughts already racing to the next thing on your list? That is data. It is telling you which operating system you are running on.
THE DO: Before your next high-stakes meeting, take 90 seconds. Feel your feet on the floor. Notice your breath without changing it. You are not being soft. You are bringing your smartest brain online.
A Note on the Science
The framework I use draws from polyvagal theory, developed by Dr. Stephen Porges. I want to be honest with you: polyvagal theory is actively debated in the scientific community. A 2026 paper co-signed by 39 researchers challenged several of its core biological claims.
I use this framework as a practical leadership lens, not as rigid anatomical dogma.
The phenomena it points to are well-established across mainstream neuroscience. Stress hormones suppress strategic thinking. Heart rate variability correlates with cognitive flexibility. Emotional states are contagious through mirror neuron systems. None of that changes regardless of where the polyvagal debate lands.
The framework may be imperfect. The leadership reality it describes is not.
FAQ: The Nervous System and Executive Decision-Making
Why do leaders make bad decisions under pressure? Stress hormones like cortisol and adrenaline suppress the prefrontal cortex, the brain region responsible for strategic thinking, impulse control, and integrating long-term consequences. The brain shifts to amygdala-driven processing that is fast, reactive, and biased toward immediate threat resolution rather than optimal outcomes.
What is the difference between ventral and sympathetic states in leadership? Ventral, or Strategic Mode, means the brain is regulated, integrated, and operating with full prefrontal capacity. Calm focus, long-term thinking, nuanced risk assessment. Sympathetic, or Reactive Mode, means the nervous system has detected a threat and shifted to survival processing. Short-term focus, binary thinking, narrowed empathy, and urgency.
How does a CEO’s nervous system state affect their team? Through emotional contagion. Mirror neurons cause team members to automatically mirror a leader’s physiological state. Leader-to-team transmission is asymmetric, meaning the leader’s state has an exponentially larger effect on the room than any individual team member. Research shows manager stress elevates employee stress for up to a year.
Can nervous system regulation be learned? Yes, but not through knowledge alone. The brain develops regulatory capacity through repeated experiences of co-regulation, which means being in the presence of someone who is already regulated. This is why bringing in an external regulator during the capacity-building phase is so effective. Over time, the brain rewires and the leader can sustain regulation independently.
References
- Laborde, S. et al. (2022). “Heart rate variability and executive functioning: A meta-analysis.” Cortex. PubMed: 36030561
- Shields, G. et al. (2016). “The effects of acute stress on core executive functions.” Neuroscience & Biobehavioral Reviews. PMC5003767
- Arnsten, A. (2024). “Stress hormones and prefrontal cortex functioning.” Neuroscience & Biobehavioral Reviews. PMC11061251
- Superhuman (2025). “Executive Burnout Statistics.” blog.superhuman.com
- Sentry (2025). “C-Suite Index: Executives More Stressed in 2025.” sentry.com
- Rae Francisco Consulting (2025). “Emotional Contagion: Leadership Stress Transmission.” raefrancisconsulting.com
- Leadership Circle (2025). “Polyvagal Theory and Leadership.” leadershipcircle.com
- Colgate, R. & Colgate, D. (2025). “Integrating Polyvagal Theory with the Coaching Leadership Style.” MDPI.
- Saffron Sage Living (2026). “The HRV Benchmark: Why the Best CEOs Are Training Their Nervous Systems.” saffronsageliving.com
Julia Lefevre is the founder of Brave Restoration and a Regulated Leadership coach who works with executives and their teams to build the nervous system capacity that strategic leadership requires. She helps leaders move from reactive to regulated. Not through theory, but through experience.