Joseph LeDoux
American neuroscientist known for research on the amygdala and threat responses
Neuroscientist, long based at New York University, who used Pavlovian fear conditioning in rodents to trace how the amygdala handles threat. He later argued that circuits for defence are separate from conscious feelings of fear.
Why this person matters
LeDoux's rodent work on threat learning shaped the popular picture of the amygdala as a fear centre. He later rejected that framing himself, arguing that survival circuits do not by themselves produce feelings. His collaborators include Michael Gazzaniga, Elizabeth Phelps, Karim Nader and Glenn Schafe.
Main contributions
Amygdala and threat conditioning
Using Pavlovian fear conditioning in rodents, he traced neural circuits for threat. He proposed a fast, rough subcortical route to the amygdala, the low road, and a slower, more fully processed cortical route, the high road.
The Emotional Brain
His 1996 book The Emotional Brain presented an account of emotion and threat responses centred on the amygdala for a wide readership. It grew out of his doctoral work with Michael Gazzaniga on split-brain patients.
Survival circuits
In a 2012 Neuron paper he proposed organising emotion research around survival circuits for defence, energy and nutrition, fluid balance, thermoregulation and reproduction. He argued these circuits are not causally tied to feelings, though they influence them indirectly.
Context and limits
LeDoux's later position departs from his earlier popular framing. The 2012 paper treats the amygdala as part of defence circuitry that also contributes to appetitive states, and so not as a dedicated fear centre. In 2014 he argued that Pavlovian fear conditioning should be called threat conditioning, so the term does not imply that animals acquire fear. Lisa Feldman Barrett is reported to take a similar view on fear. The pages read contain no outside critiques of his work.
In your introductory course
Biological bases of behaviour.LeDoux appears in chapters on the biological bases of emotion and on learning, through the amygdala and fear conditioning. Students should note that he has revised the fear-circuit idea.
Related course reading: Psychology 2e, section 3.1. This is course context rather than a biographical source.
Years of active work
- 1989
He joined New York University's new Center for Neural Science as its first outside hire.
- 1996
He published The Emotional Brain.
- 2012
He published Rethinking the emotional brain in Neuron.
- 2015
His book Anxious: Using the Brain to Understand and Treat Fear and Anxiety was published.
Sources
- NYU Center for Neural Science, Joseph LeDouxUniversity. Institutional biography inspected.
- National Academy of Sciences, Joseph E. LeDouxSociety or association. Institutional biography inspected.
- LeDoux, Rethinking the emotional brain (Neuron, 2012, PMC)Original work. Abstract inspected.
- Wikipedia, Joseph E. LeDouxReference work. Reference article inspected.