Brain Science with Ginger Campbell, MD: Neuroscience for Everyone BS 161 Joseph Ledoux
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Sep 27, 2019 Neuroscientist Joseph LeDoux traces survival behavior back billions of years and challenges familiar assumptions about fear, emotion, and consciousness. The conversation explores the amygdala, the brain’s unconscious control of behavior, human mental time travel, and how scientists might study animal minds. It also touches on the evolution of consciousness and the diverse paths that lead into neuroscience.
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From Business Degrees To Neuroscience
- Joseph Ledoux described his unconventional path from business degrees into neuroscience and split-brain research.
- He then transitioned to decades of rodent research on danger detection and the amygdala.
Survival Behaviors Precede Feelings
- Survival behaviors (detecting danger, eating, reproducing) trace back to the origin of life and predate nervous systems.
- Joseph Ledoux argues subjective feelings are not necessary for those behaviors and evolved later.
Amygdala Controls Responses, Not Feelings
- The amygdala controls behavioral and physiological responses to threat but does not itself generate the conscious feeling of fear.
- Ledoux distinguishes implicit (non-conscious) threat responses from explicit conscious fear states.