Understanding Your Nervous System with Bilateral Stimulation, the Vagus Nerve, and Polyvagal Theory

The way your mind and body are connected is fascinating, and it’s key to understanding why we feel the way we do, especially when life gets hard. If you’ve been dealing with stress, anxiety, or simply trying to feel more balanced, this is for you.

Today, I want to talk about how bilateral stimulation, the vagus nerve, and something called polyvagal theory all connect to improve your mental health. Don’t worry if those terms sound a little scientific. My goal is to explain them in ways that make sense, with a side of practicality and even some humor. Because hey, sometimes you just need to laugh through the chaos, right?

The Vagus Nerve – Your Built-In Wellness Ally

First, let me introduce you to the vagus nerve. This unsung hero runs from your brainstem all the way down to your abdomen, branching out to touch your heart, lungs, and digestive organs. It’s basically your body’s built-in stress manager. When it’s active, you’ll feel calmer, more present, and more in control. Think of it as the opposite of that “fight or flight” reaction you probably know well.

When stress takes over (hello, traffic jams, deadlines, or toddler tantrums), your body revs up into fight-or-flight mode, and this is where the vagus nerve steps in to help you tap the brakes. Engaging the vagus nerve—what’s called improving “vagal tone”—is critical for managing stress and calming your nervous system.

Research backs this up. A study published in Frontiers in Psychiatry (2018) found that good vagal tone is linked to better emotional regulation, less anxiety, and healthier stress responses. Essentially, when we learn how to engage the vagus nerve, we give ourselves the power to feel more grounded, both physically and emotionally.

Polyvagal Theory – Breaking Down Your Stress Responses

Now, polyvagal theory, created by Dr. Stephen Porges, takes this a step further. Polyvagal theory explains how different parts of the vagus nerve guide how we respond to stress. Think of it as your body’s three settings:

1. Safe and Social Mode: This is the gold standard we’re aiming for. When your ventral vagus nerve is in charge, you feel relaxed, open to connection, and able to think clearly. Picture yourself catching a Cubs game with friends on a sunny Chicago afternoon—this is where you’re at when life feels pretty good.

2. Fight or Flight Mode: This kicks in when your body senses danger. Your sympathetic nervous system speeds everything up—heart rate, breathing, adrenaline. It’s useful if a pigeon suddenly swoops near your face (it is Chicago, after all), but it’s not great if you’re stuck here every time you make a mistake at work or replay an argument in your head for hours.

3. Shutdown Mode: When stress overwhelms your system, you might flip into this “freeze” state. It’s your body’s way of powering down when it thinks there’s no way out of the stress. Ever spent a day binge-watching Netflix under a blanket because everything feels “too much”? You might’ve gone into this dorsal vagal state.

Dr. Porges’ theory gives us a framework for understanding that these responses aren’t wrong or bad; they’re your body’s way of protecting you. The goal is learning how to move back into that safe-and-social mode when stress takes over.

Bilateral Stimulation – A Tool for Unsticking Your Brain

Now, here’s where bilateral stimulation comes in. Bilateral stimulation, or BLS, is a key part of EMDR therapy, something I often use with clients who have experienced trauma or are feeling “stuck” emotionally. During EMDR therapy, clients follow side-to-side eye movements or hear alternating sounds while revisiting distressing memories. It helps the brain process and “unstick” those memories so they don’t feel as overwhelming anymore.

Even if you’re not in formal therapy, BLS is a powerful tool for anyone wanting to calm their nervous system and improve their focus. It essentially gives your brain a nudge, redirecting its attention and helping balance the nervous system. One study published in The Journal of EMDR Practice and Research (2018) found that bilateral stimulation can reduce distress from negative memories while increasing relaxation and positive emotions.

The Mind Circuit app harnesses this power in a user-friendly way, combining bilateral stimulation with positive affirmations. Think of it as having a therapist-approved resource in your back pocket. When life throws chaos your way, apps like Mind Circuit can help you shift into a healthier mental and emotional space from the comfort of your living room.

How It Plays Out in Daily Life

To better explain how all of this interconnects, I want to share two scenarios—one simple, one a little funny.

A Simple Example

Imagine Maria. She’s been feeling overwhelmed for weeks—work stress, family responsibilities—it’s all piling up. Last week, during a particularly tough day, she started noticing her heart racing and her mind spiraling into “what if” worst-case scenarios. Maria decided to pause and use the Mind Circuit app for ten minutes before bed. She followed along with a bilateral stimulation meditation paired with affirmations about resilience. Her body started to relax, her thoughts slowed down, and for the first time in days, she fell asleep easily.

That’s the power of blending BLS and emotional regulation.

A Funny Example

Now for Nicole, who I bet we can all relate to. Nicole is notorious for getting flustered under pressure—like the time she showed up to a client meeting wearing mismatched shoes. (Seriously. One brown, one black.) Her mind went into full panic mode—“What’s wrong with me? Will they notice? Am I losing it??”

Nicole excused herself to the restroom, opened the Mind Circuit app on her phone, and chose a two-minute affirmation session with bilateral stimulation. The alternating tones helped calm her system while she focused on a simple mantra—“It’s okay to laugh at myself.” By the time she walked back into the meeting, she was smiling and even cracked a joke about her mismatched loafers. Crisis averted.

Why This Matters

These examples might seem simple, but they highlight something profound. Whether you’re managing stress, working through trauma, or just looking to feel more centered, tools like bilateral stimulation and vagus nerve activation offer paths to healing. They’re not about erasing difficult moments—they’re about helping your nervous system feel safe enough to process and move forward.

What I love about polyvagal theory and BLS is that they empower us to become more attuned to our bodies. When you notice your heart racing during a tense meeting or when you’re stuck replaying a conflict with your partner, you don’t have to just stay there. You can use tools like breathing exercises, apps like Mind Circuit, or even a simple belly laugh to pull yourself back into that safe-and-social space where you feel grounded.

Putting It All Together

If you’re ready to put this into practice, start here:

1. Engage Your Vagus Nerve: Incorporate activities like deep breathing, humming, or splashing cold water on your face into your daily routine.
2. Try Bilateral Stimulation: Download a tool like the Mind Circuit app to guide you through BLS exercises paired with affirmations.
3. Pay Attention: Notice where you are in your nervous system states throughout the day. Are you tense, calm, or frozen? Learning to recognize these patterns is the first step toward change.

Remember, your nervous system isn’t your enemy—it’s trying to protect you. With the right tools, you can guide it into a healthier space where it supports you, not works against you.

Sources

• van der Kolk, B. (2014). The Body Keeps the Score. Viking.
• Porges, S. W. (2001). “The Polyvagal Theory.” Neurophysiological foundations of emotions, attachment, communication, and self-regulation.
• Schultz, D., & Bryant, R. A. (2018). “The efficacy of bilateral stimulation in EMDR.” The Journal of EMDR Practice and Research.
• Ginsberg, J. P., et al. (2018). “Heart rate variability responses during vagus nerve stimulation.” Frontiers in Psychiatry.