If the brainstem is survival and the cortex is sophistication, then the limbic system is poetry.
It is the part of the brain that blushes. Tucked deep beneath the grand architecture of the frontal and parietal lobes lies this older circuitry, the emotional undercurrent of our species. We are layered creatures: the reptilian brain keeps us breathing and territorial, the limbic brain lets us bond, and the neocortex writes sonnets about it afterwards.
The reptile survives. The limbic system feels. The cortex explains. And sometimes, the limbic system misfires.
She was twenty-eight, newly married, the kind of person who wore glass bangles that chimed when she moved her hands. She spoke softly but laughed loudly. The mehendi from her wedding had barely faded from her hands when the episodes began. Her seizures did not look like seizures; they began as sudden waves of déjà vu. “It feels like I’ve lived this moment before,” she told me, sitting upright in my clinic, fingers intertwined with her husband’s. “It’s like I’m watching my own life on replay.” Then came the rising flutter in her stomach. A metallic taste. The smell of something burning that no one else could detect. And then tears. Not sadness exactly; just an overwhelming emotional swell, as though someone had turned up the volume on her inner life.
Her husband thought she was being dramatic. Her mother thought she was being hormonal.
She thought she was losing her mind. The MRI showed a small lesion in the mesial temporal lobe, nestled like a stubborn pearl within the hippocampus and amygdala. The very epicentre of memory and fear; of attachment and alarm.
I turned the screen slightly toward them. “This,” I said gently, pointing to the pale oval buried deep inside the brain, “is sitting in the control room of your emotions.” She stared at it. “So, I’m not dramatic?” “No,” I smiled. “You’re electrical.”
The amygdala is the brain’s smoke detector. It decides what is dangerous, what is desirable, and occasionally what is worth fighting about on a Sunday afternoon. The hippocampus, by contrast, is the archivist. It catalogues our first kiss, our last goodbye, and where we parked the car. Together they form the core of the limbic system, that mysterious orchestra of emotion and memory that shapes who we love and how we remember loving them. When tumours grow here, or when abnormal electrical circuits spark, love itself can begin to flicker.
Her seizures grew frequent. Medication dulled them but did not silence them. Each episode was a small electric storm, a private thunderclap in the theatre of her mind. “Will I forget him?” she asked one afternoon, almost whispering, probably after watching Saiyaara, a 2025 Bollywood movie where a whirlwind romance is tested by early-onset Alzheimer’s.
“No,” I said carefully. “The brain is not a single photograph album. It is a distributed library. We will remove what is sick. The rest will stay.”
Eventually, we decided on an amygdalo-hippocampectomy: a surgical term that sounds barbaric but is, in fact, precise and deliberate. Operating in the limbic system is like performing surgery inside a diary. You are acutely aware that you are touching the circuitry of someone’s attachments, memory, fear, desire. You remove too much and you risk blunting emotion or impairing recall. Too little and the seizures continue to write their own chaotic poetry.
In the operating theatre, the room was quiet but alert. Navigation guided us to the lesion. Intraoperative monitoring kept watch over speech and motor pathways. Every millimetre mattered. The amygdala yielded first. The hippocampus followed, pale and curved like a seahorse, living up to its Greek etymology. When the lesion came free, it was anticlimactic. No fanfare; just a small piece of pathological tissue in a cup.
Postoperatively, she woke gently. She looked around, disoriented but calm.
“Who’s this?” I asked lightly, pointing to her husband.
She rolled her eyes. “Don’t test me already!”
She recognised him. She remembered her wedding. She cried, but this time for entirely normal reasons.
Months later she returned to my clinic. No seizures. No déjà vu. Her emotional life intact, and if anything, more stable. “I still love him,” she said, smiling at her husband, “but now without the special effects.”
There is something humbling about operating on the limbic system. It reminds you that love is not just metaphor, it is circuitry. That attachment is not weakness, it is wiring. That heartbreak has anatomy. And yet, no scan can fully capture the mystery of connection. The limbic system resonates between people. It regulates us in ways we barely comprehend. It is why a mother’s voice calms a crying child. Why grief physically hurts. Why a song can undo you.
The reptilian brain keeps us alive.
The cortex helps us argue on television.
But the limbic system is why we hold hands in the dark.
We can operate on it. We can map it. We can quiet its storms.
But thankfully, even after an amygdalo-hippocampectomy, love usually survives.
Because if romance were stored in one small nucleus, neurosurgeons would have been out of business centuries ago.
Afterthought: For those tempted to ask what happens if one removes both the amygdala and hippocampus entirely, history provides an answer. In classic primate experiments, monkeys who underwent bilateral temporal resections became strikingly unafraid, emotionally indiscriminate, and rather too affectionate with inanimate objects—a condition later described as Kluver–Bucy syndrome.
The author is consultant neurosurgeon at Wockhardt Hospital, Mumbai.
mazdaturel@gmail.com @mazdaturel