human 64 middle aged adult 62 Humans 59 female 59 Middle Aged 55 male 55 Female 52 Adult 49 Male 49 emotion 38 psychology 37 Article 36 young adult 30 Young Adult 29 Emotions 27 major clinical study 27 aged 26 controlled study 25 physiology 23 Aged 22 Adolescent 20 adolescent 20 human experiment 15 Magnetic Resonance Imaging 12 cognition 12 nuclear magnetic resonance imaging 12 procedures 12 questionnaire 12 article 11