The Science of Love: How Positivity Resonance Shapes the Way We Connect

Brain Pickings
Maria Popova
 

The neurobiology of how the warmest emotion blurs the boundaries by you and not-you.

We kick-started the year with some of history’s most beautiful definitions of love. But timeless as their words might be, the poets and the philosophers have a way of escaping into the comfortable detachment of the abstract and the metaphysical, leaving open the question of what love really is on an unglamorously physical, bodily, neurobiological level — and how that might shape our experience of those lofty abstractions. That’s precisely what psychologist Barbara Fredrickson, who has been studying positive emotions for decades, explores in the unfortunately titled but otherwise excellent Love 2.0: How Our Supreme Emotion Affects Everything We Feel, Think, Do, and Become (UK; public library). Using both data from her own lab and ample citations of other studies, Fredrickson dissects the mechanisms of love to reveal both its mythologies and its practical mechanics.

Read more

Scientists have built an 'off switch' for the brain

The Independent

Scientists have developed an “off-switch” for the brain to effectively shut down neural activity using light pulses.


In 2005, Stanford scientist Karl Deisseroth discovered how to switch individual brain cells on and off by using light in a technique he dubbed 'optogenetics'.

Research teams around the world have since used this technique to study brain cells, heart cells, stem cells and others regulated by electrical signals.

However, light-sensitive proteins were efficient at switching cells on but proved less effective at turning them off.

Now, after almost a decade of research, scientists have been able to shut down the neurons as well as activate them.

Mr Deisseroth’s team has now re-engineered its light-sensitive proteins to switch cells much more adequately than before. His findings are presented in the journal Science.

Thomas Insel, director of the National Institute of Mental Health, which funded the study, said this improved “off” switch will help researchers to better understand the brain circuits involved in behavior, thinking and emotion.

Read more