You may have heard the phrase, “What fires together wires together.” It’s a simple yet powerful way to describe a foundational principle in neuroscience known as Hebb’s Law. The concept originated from psychologist Donald Hebb in 1949 and helps us understand the relationship between experiential learning, memory, and healing trauma in the brain and nervous system.
What is Hebb’s Law?
Hebb’s Law states that when two neurons activate at the same time, the connection between them becomes stronger. In other words, neurons that fire together wire together. This process, called long-term potentiation (LTP), is how the brain creates and reinforces patterns, both helpful and harmful.
If you’ve ever practiced a new skill repeatedly, like riding a bike, playing piano, or learning a new language, you’ve experienced Hebb’s Law in action. The more you practice, the easier and more natural it feels over time. That’s your brain and nervous system wiring itself to make that action easily accessible and efficient.
But here’s the thing: the same wiring process also applies to our emotional experiences, relationships, and trauma responses.
How This Applies to Attachment and Trauma
In early life, our brains are highly adaptable and responsive to experiences. If a child consistently experiences pillars of secure attachment such as nurturing, guidance, protection, and attunement from a caregiver, their neural pathways wire nurturing and attunement together with safety and security. If the child continues to experience these types of interactions at least 33% of the time, the child is more likely to develop secure attachment patterns and a healthy ability to connect with others.
However, if a child experiences neglect, dismissiveness, criticism, or abuse, their brain adapts in a different way. Their neural networks could wire criticism and shame together along with an unconscious sense of danger. This can lead to insecure attachment patterns and survival-based responses like hypervigilance, dissociation, or avoidance.
The good news? These patterns can be rewired, even in adulthood, meaning trauma can be softened and resolved in the brain and nervous system.
Rewiring Through New, Healing Experiences
Because of neuroplasticity, we now know that new relational experiences can literally change the brain. When someone begins to experience interactions that bring in compassion, empathy, and feeling seen and heard, whether in therapy, or with family, friends, or a romantic partner, those neurons start to fire in new ways.
Each time a person is seen, soothed, and supported in a moment of vulnerability, the nervous system goes into a neuroception of safety and then the brain begins to associate this new connection with security knowing they are, now, not alone. Repeated over time, those new neural pathways become stronger, and old trauma-based patterns, such as those based on feeling alone and ashamed, can weaken.
Summary
Old wounds wired in fear, judgment, and mistrust can be replaced by new experiences of empathy, protection, and attuned connection.
Every time we respond with empathy instead of judgment, or presence instead of withdrawal, we’re offering a new “firing pattern” for the brain to work with. We can change the firing pattern with new and positive experiences. Over-writing negative experiences with compassion-based experiences can help resolve trauma. The brain and nervous system can now replace old, painful experiences with tender and compassionate ones.
How to Support This Process
Whether you’re a therapist, caregiver, partner, or simply someone on your own healing journey, here are some ways to support this rewiring process:
- Consistency is powerful: Repeated interactions with threads of tenderness and kindness, even small ones, reinforce trust.
- Co-regulation: Calm, attuned presence with others helps regulate the nervous system and models a healthy way of being in relationship.
- Mindfulness and self-compassion: These practices help rewire inner neural pathways by creating new associations with safety, curiosity, and acceptance.
- Therapeutic relationships: Trauma-informed therapy provides a structured space for compassionate, reparative experiences that support healthy attachment and integration.
Final Thoughts
The phrase “What fires together wires together” reminds us that our brains are not fixed. They are dynamic, always learning from experience. And while trauma can leave deep imprints on the brain and nervous system, so can healing relationships.
By intentionally creating moments of connection, safety, and compassion – both within ourselves and with others – we help rewire the brain for resilience, belonging, and love.
If you are curious about therapy to heal trauma visit Our Approach page to learn how our therapists can help resolve trauma or troubling relationship patterns.
References:
Hebb, D. O. (1949). The organization of behavior: A neuropsychological theory. New York: Wiley and Sons.
