TED Talks Daily - How gratitude rewires your brain | Christina Costa

Episode Date: August 6, 2026

When a psychologist who studies well-being ends up with a brain tumor, what happens when she puts her own research into practice? Christina Costa goes beyond the "fight" narrative of cancer — or any formidable personal journey — to highlight the brain benefits of an empowering alternative to fostering resilience in the face of unexpected challenges: gratitude.(This episode originally aired in 2023.) Hosted on Acast. See acast.com/privacy for more information.

You're listening to TED Talks Daily, where we bring you new ideas to spark your curiosity every day. I'm your host, Elise Hugh. When Christina Costa was a middle school science teacher, she had a little ritual with her students. At the end of a good stretch of work, she would ask them to kiss their brain, tap their fingers to their lips, then tap the top of their heads, a small, silly gesture of gratitude. Years later, she'd left teaching to get her Ph.D. in psychology. And that phrase would mean more to her than she could have ever ever. imagined. I have never been more scared in my life than I was that night. And with tears dripping

down my face in the hospital, I kissed my brain for the first time since I had left my middle school classroom. Christina, who is now a psychologist, studies resilience and well-being. And not long ago, she was diagnosed with a brain tumor. In her talk from 2021, she shares that almost immediately after her diagnosis, she noticed the language everyone reached for, that she was strong, that she would be ready to fight, and the more she heard it, the less it fit. Fighter. I look at myself in the mirror. It felt okay at first.

But soon it became exhausting. Too heavy to lift, too much to carry, too burdensome to bear. I took it off and left it on the floor. War was not for me. A body is not a battlefield. Instead, she offers a different way through a frightening diagnosis. One rooted not in battling, but in gratitude. She walks through what the science actually says about that choice

and how a practice, as small as kissing your brain, might reshape the way we face the hardest things. That's coming up right after a short break. And now our TED Talk of the Day. When I was a middle school science teacher, I would often ask my students to kiss their brain. I got this idea from visiting my friend's kindergarten classroom. She would ask her students to kiss their brain

and they would take their fingers, tap them to their mouth, and then to the top of their head, and it truly was as cute as you can picture it to be. So I decided to bring it back to my middle school classroom, which could have gone one of two ways, but it ended up being a really fun ritual for us too, and I would ask them to kiss their brain for all the work they did in class as a practice of gratitude.

After teaching middle school, I came back to grad school to get my PhD in psychology. My research is within the area of positive psychology, which is a science that investigates the strengths and factors that allow individuals and communities to thrive. I also get to teach psychology to undergrad students and high school students. I love teaching psych, and my absolute favorite unit to teach in introsyke is the brain. But while I love teaching about the brain, I thought it would be pushing it to ask my undergrads, aka adults, to kiss their brain. So three years would go by before I would remember that fun phrase.

One day after teaching last year, I had a terrible migraine that left half of my face numb and blurred my vision. The migraines kept happening. I saw multiple doctors, and then I started experiencing dizzy spells. The neurologist ordered an MRI, and I remember being so excited because then I would be able to use my own brain pictures

when I taught brain imaging to my students. But as it turns out, my MRI wasn't too picture perfect. The doctor called me and asked me to go to the ER because there was a large mass in the right hemisphere of my brain. I have never been more scared in my life than I was that night, and with tears dripping down my face in the hospital, I kissed my brain for the first time since I had left my middle school classroom.

I made it my mantra, and I kissed my brain every single day leading up to and after surgery. Then two weeks later, after surgery, the pathology reports came back and I was diagnosed with an anaplastic astrocytoma. The weeks following were very difficult. I tried to figure out what I was struggling with the most by looking back on all the things I had been writing about this experience. I wrote and posted this on Instagram about a week after I received that pathology report. I will keep fighting. I will keep loving. I will keep living. I will keep living.

And then about a week after that, I wrote this. Fighter. I tried it on to see how it felt because I kept hearing those words next to my name, like a job, like an identity, like a role. Fighter. I look at myself in the mirror. It felt okay at first. But soon it became exhausting.

Too heavy to lift, too much to carry, too burdensome to bear. I took it off and left it on the floor. war was not for me. A body is not a battlefield. I realized that I had been introduced to the fight narrative. When people heard my diagnosis, I became a fighter. You're a fighter. Keep fighting. Beat this tumor.

We're the top comments. And then there was the internet, the place I so desperately searched for people who were doing well with their diagnosis. But the top hashtags to search for were brain tumor suck, cancer sucks, and cancer fighter. I understand completely why those hashtags exist, but I was so eager to find the hashtag,

Hi, I have a brain tumor that might never go away and I'm still living and thriving, and I guess there just isn't a ring to that one. I hated the idea that I was going to be at war with my brain because I had spent months and years kissing it instead. I hated the suggestion of naming my tumor something awful because the reality is that it was going to be my neighbor for the rest of my life.

And I hated the guy imagery training that asks me to picture chemo as an army coming to battle the cancer cells because I didn't want to spend over a year of my life at war with my own body. I can see how these elements of the fight narrative can be empowering for people, but for me I knew it wasn't going to work. So I started to reference well-being practices that I had learned from my own studies. Doctors always laugh with me when they find out that I'm a biopsych and neuroscience major and it's like PhD student.

Then when they ask what I'm studying and I tell them I study resilience and well-being, they either laugh again, say something like, oh, that's irrelevant, or go, ah. The irony was never lost on me.

I have read so many stories and studies of resilience, but I never pictured the day that I would have to personally experience it. I read and taught about gratitude practices specifically as a well-being strategy, and even though I knew the positive effects, I had never seriously practiced them myself.

I started to incorporate some of these exercises into my life. I tried to stop focusing on what my body had done wrong and focus on the gratitude I had for my body instead. And really, I realized this is something I had been doing when I was kissing my brains those days leading up to and after surgery. Gratitude became the tool that helped me restructure my vision of illness and disability when the world was telling me I should fight it instead. Instead of thinking about if I would be able to have kids one day, I thought of how amazing it was that my brain, despite

its trauma, was able to deliver the perfect amount of hormones to my body to produce enough eggs to stay for a later date. Every time I went to radiation and was put in my mask, I kissed my brain and I focused on the resident telling me how the healthy cells would be able to repair over time and the cancer cells could not. And when the operative notes came back for my surgery, a day that I remember very well and had been scared to think about,

I read the note out loud, sobbing, happy and grateful tears, thinking about what my neurosurgeons team did. I started to feel such an immense sense of gratitude for science, medicine, and my medical team that those thoughts started to drown out the what is my life going to be like thoughts. The more I practice gratitude, the more peace I felt my situation, and this got me interested in what could be happening with the science of gratitude

at a neurological level. There are several positive psychological and social outcomes of gratitude, like increases in happiness, decreases in depression, having stronger relationships and experiencing positive emotion, and fMRI studies show us that several parts of our brain and pathways are activated when we experience and express gratitude. One of these parts is the medial prefrontal cortex, an area associated with the management of negative emotions.

Together, these changes in neurotransmitters and hormones, combined with the activated neural pathways, help us cognitively restructure potentially harmful thoughts to better manage our circumstances. And the cool thing is that we can intentionally activate these gratitude circuits in our brain. In general, the more we do something, the easier it becomes, and our brains work the same way. The more we activate these gratitude circuits, the less effort it takes to stimulate those pathways the next time, and the stronger those pathways become. Neuroplasticity

is a term I teach my students that refers to our brain's ability to form new neural connections throughout life, which means this is something that anyone can practice and get better at over time. So I kept practicing gratitude even when it seemed impossible. I continue to thank my brain for the amazing work it does as I prepare for 12 more rounds of chemo this year. I write down three things I'm grateful for and why I'm grateful for them, no matter what, every morning that I wake up. I write thank you notes to my heroes in health care, nurses who get the IV in the first time, the anesthesiology resident who held my hand during the awake portions of my surgery, radiation therapists that play my playlist during treatment and administrative staff that makes me smile

every time I walk into the hospital. I do want to take a second here and practice what I teach to shout out my doctors and their teams from the Michigan Medicine multidisciplinary brain tumor clinic. I have never met such intelligent, kind, and patient people. Thank you for making me feel brave when I sometimes felt the opposite. I think the universe might think it's funny that a psych instructor and researcher who studies well-being ended up with a brain tumor. The truth is that we need more awareness

and more research regarding brain tumors and brain cancer. Doctors can't exactly predict how my tumor will behave, and really none of us can predict what our lives are going to be like exactly. But what I hope I can show you is that we can also be grateful for the unexpected challenges. I don't want to dismiss people who may find the fight narrative empowering. I also don't want to suggest that it is by any means easy to find ways to be grateful in dealing with adversity. This has been the hardest thing that I've ever had to do.

But I do want to empower those that feel like me, that there's another way to go through whatever your journey may be, that loving your body doesn't have to be conditional, and that by practicing gratitude, we can actually wire our brains to help us build resilience. And lastly, I hope everyone, no matter where you are or what you are doing, can take a second to kiss your own brain and thank it for all that it does for you. That was Christina Costa at TEDx U of M in Ann Arbor, Michigan in 2021. This talk was originally published in December of that year. If you're curious about Ted's curation, visit ted.com slash curation guidelines. And that's it for today.

Ted Talks Daily is a podcast from TED. This episode was fact-checked by the TED research team and produced and edited by our team, Martha Estefanos, Oliver Friedman, Lucy Little, Emma Tobner, and Tonzica, Sunmar Nivon. Additional support from Daniela Ballerazo, Christopher Faisi Bogan, Valentina Bohanini, Ban Ban-Chang, Brian Green, and Laney Lott.

Learn more at podcasts.com. I am Elise Hu. I'll be back tomorrow with a fresh idea for your feet. Thanks for listening.