A new study by researchers at Columbia University sheds light on how our experiences and emotions might influence brain health. The study provides evidence that mitochondria, the tiny powerhouses inside our brain cells, could be the key players in this relationship. In older adults, positive psychosocial experiences — such as a larger social network or a greater sense of purpose — are linked to healthier brain mitochondria. Conversely, negative experiences — like social isolation or depression — are associated with less robust mitochondrial function. The findings have been published in the Pro…