Ключевые слова: 90s, age, aging, background, braincomputer, brainwave, caucasian, cheerful, cognition, eeg, elder, elderly, experiment, face, golden years, grandfather, happy, headset, health, interface, lab, male, man, mature, monitoring, net, neuroscience, nonagenarian, old, one, people, person, portrait, research, retired, retirement, science, senior, signals, smile, tech, technology, wisdom,