Cognitive decline refers to the gradual and progressive deterioration of cognitive abilities such as memory, attention, reasoning, and decision-making. This decline is commonly associated with aging, but can also be influenced by various factors such as genetics, lifestyle, and medical conditions. Research in this area focuses on understanding the underlying mechanisms of cognitive decline, identifying risk factors, and developing interventions to slow down or prevent cognitive deterioration. Studies often involve neuroimaging, neuropsychological assessments, and cognitive training to investigate how cognitive abilities change over time and how they can be maintained or improved. Ultimately, the goal of research in cognitive decline is to enhance our understanding of age-related cognitive changes and develop effective strategies to promote healthy cognitive aging.