Gresham College Lectures

Why Do We Fear? - Robin May

Oct 17, 2025
Robin May, a Professor of Infectious Disease at the University of Birmingham, delves into the biology and psychology of fear. He explores fear's evolutionary role as a survival mechanism and its complex nature within the brain, highlighting how the amygdala drives responses. May discusses panic disorders, assessing genetic influences and physiological triggers. He intriguingly links gut microbiomes and microbes like Toxoplasma to fear responses. The talk concludes with insights into applying fear biology to enhance crowd safety and aid treatment.
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INSIGHT

Fear Is A Fast Biological Response

  • Fear is a fast, evolutionarily conserved brain-body response driven by the amygdala and hypothalamus.
  • It triggers hormonal changes like adrenaline to prepare immediate fight-or-flight actions.
ANECDOTE

The Case Of SM Lacking Fear

  • Patient SM lacks amygdalae and does not feel normal fear, which left her vulnerable to repeated victimisation.
  • Despite hardships, SM remained unusually cheerful and not depressed.
INSIGHT

Body Shapes Fear Memory Strength

  • Physiological arousal feeds back into perceived fear: injected adrenaline makes films feel scarier.
  • Stronger fear produces stronger memories, which is evolutionarily protective.
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