Jaak Panksepp (June 5, 1943 – April 18, 2017) was an Estonian-American neuroscientist and psychobiologist who coined the term "affective neuroscience", the name for the field that studies the neural mechanisms of emotion.

[1][2][3] He was the Baily Endowed Chair of Animal Well-Being Science for the Department of Veterinary and Comparative Anatomy, Pharmacology, and Physiology at Washington State University's College of Veterinary Medicine, and Emeritus Professor of the Department of Psychology at Bowling Green State University.

His family escaped the ravages of post-WWII Soviet occupation by moving to the United States when he was very young.

[10] In his book Affective Neuroscience, Panksepp described how efficient learning may be conceptually achieved through the generation of subjectively experienced neuroemotional states that provide simple internalized codes of biological value that correspond to major life priorities .

[11][12] Panksepp carved out seven biologically inherited primary affective systems called SEEKING (expectancy), FEAR (anxiety), RAGE (anger), LUST (sexual excitement), CARE (nurturance), PANIC/GRIEF (sadness), and PLAY (social joy).