Tommy O'Connor

Your brain is built to forget almost everything that happens to you. It makes one exception, and you're looking at it. Carole Peterson at Memorial University has spent over 25 years studying our earliest memories. She found that the first one most adults can recall comes from age 2.5, not 3.5 as the old textbooks said. The early memories that survive share three things: a strong feeling, a new experience, and a physical sensation. A wave, a dad's grip, and the weird feeling of riding a board check every box. The mechanism lives in the amygdala. It's the brain's emotion sensor, sitting right next to the hippocampus, the part that files memories. When something big happens, the amygdala triggers a flood of stress hormones like cortisol. That's the signal to the hippocampus to file this one extra deep. James McGaugh at UC Irvine spent his career showing this works for happy moments too. The amygdala fires for pleasure the same way it fires for fear. What matters is how loud the feeling is. Dads play a particular role here. Daniel Paquette, a developmental psychologist in Montreal, has spent 20 years researching what he calls the "activation relationship." Moms tend to be the safe base kids come back to. Dads tend to be the door to the outside world. They push kids into new and slightly scary situations, and stand right there as the safety net. Kids who grow up with this kind of dad end up more confident, less anxious, and more comfortable around strangers. A 2017 review pulled together 16 studies covering 1,521 father-child pairs. Quality rough-and-tumble play, which means the wrestling and tossing and chasing kind, was linked to lower aggression, better emotion regulation, and stronger self-control. In rats, baby animals that don't get to play-fight grow up with an under-developed prefrontal cortex, which handles planning and impulse control. Christina Bethell's 2019 study in JAMA Pediatrics took the long view. Her team at Johns Hopkins surveyed 6,188 Wisconsin adults about their positive childhood experiences. Adults reporting six or seven of those had 72 percent lower odds of adult depression than those reporting zero to two. The effect held even for people with serious childhood trauma. Good moments keep paying out for decades. The original tweet is right. The moments that burn in are the ones with big feelings, new physical sensations, and an adult who is the bridge between safe and scary. Twenty years from now, the grip is what he'll remember.