Joseph LeDoux research is aimed at understanding the biological mechanisms of emotional memory.
Joseph E. LeDoux (1949), a neuroscientist and Professor of Neuroscience and Psychology at New York University. He is also the director of the Center for the Neuroscience of Fear and Anxiety, multi-university Center in New York City devoted to using animal research to understand pathological fear and anxiety in humans. He received his Ph.D. in 1977 at the State University of New York at Stony Brook. 
Joseph LeDoux research is focused on the biological underpinnings of memory and emotion, especially the mechanisms of fear.
The Perplexing Relationship Between Emotions and Consciousness
Joseph LeDoux’s Biggest Discoveries
Joseph LeDoux Quotes
Unfortunately, one of the most signifi cant things ever said about emotion may be that everyone knows what it is until they are asked to define it. Joseph LeDoux
One of the things we know about fear is that you can always bring it back. So if either a rat or a person, with the previously learned fear, is exposed to stress, the fear will return. And so if a patient with a fear of heights is doing fine because of the therapy, and then the patient’s mother dies and it’s very stressful and so the phobia comes back. Joseph LeDoux
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1. cns.nyu.edu. Joseph LeDoux . Retrieved August, 2009, from https://www.cns.nyu.edu/corefaculty/LeDoux.php. 2. Wikipedia.org. Joseph LeDoux . Retrieved August, 2009, from https://en.wikipedia.org/wiki/Joseph_E._LeDoux.
Selected Bibliography : Wikipedia .