“You Don’t Have Time to Think.” Heroic Veteran Capt. Florent Groberg’s Selfless Action

 

Today it was announced that Army Capt. Florent Groberg will receive the Medal of Honor for instantly tackling a suicide bomber in a split-second reaction of self-sacrifice to save the lives of his comrades.  “You don’t have time to think.  You react,” he explains.  But how is that possible?

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Posted in Awareness and Attention, by Douglas Fields, In Society, Neural Network Function, Neuroanatomy, Senses and Perception, Sensing, Thinking & Behaving, Stress and Anxiety, Uncategorized
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To Eat or Not to Eat

Today’s New York Times has a nice video showing how stimulating a small set of neurons in the amygdala can turn off a rat’s motivation to eat. The stimulation relies on a newly discovered technology called ‘optogenetics’. Continue reading

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To Flee or Freeze? Neural Circuits of Threat Detection Identified

Suddenly something streaks into your peripheral vision.  Instantly, you jump back and raise your arms defensively.  “What was that!” You exclaim in shock.   Only then do you realize that the blurred streak you just dodged was a wayward basketball zinging like a missile on a collision course for your face.  A rush of adrenaline flushes through your blood setting your heart pounding and muscles twitching, but there is nothing left to do.  Your brain’s rapid response defense system has already detected the threat and avoided it before your conscious mind is even engaged.  How is that possible, scientist, Peng Cao and colleagues of the Chinese Academy of Sciences wondered?

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Posted in Animal Research, Awareness and Attention, by Douglas Fields, Cell Communication, Neuroanatomy, Psychiatric Disorders, Senses and Perception, Stress and Anxiety, Uncategorized
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Caitlyn Jenner on the July 2015 cover of Vanity Fair magazine.

Bruce Jenner and Changing Your Brain’s Sex

The debut of Bruce Jenner’s sex change on the cover of Vanity Fair was stunning, but superficial.  A deeper question than her newfound beauty is:  What about her brain?

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Posted in Brain Development, by Douglas Fields, Chemicals, Diseases & Disorders, Educators, In Society, Neural Network Function, Neuroanatomy, Psychiatric Disorders, Uncategorized
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