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The technique used to control neurons is called DREADDs (designer receptors exclusively activated by designer drugs).
Brain neurons are genetically engineered to produce a custom-made - "designer" - receptor. When the receptor gathers in a manmade molecule that fits like a key in a lock, the neuron is activated.
Because the receptor does not respond to other molecules, including natural ones in the brain, the only way to activate the neurons is via the manmade one. DREADDs allow scientists to manipulate neurons without implanting anything in the brain.
DREADDs, invented about a decade ago, had been used to turn neurons on or off, but not both. DREADDs 2.0 are the first to do that, scientists led by Bryan Roth of the University of North Carolina reported in Neuron.
Targeting hunger-promoting neurons, the scientists made mice ignore food bowls or dive into them. Targeting movement neurons, they made mice scamper or stop.
In a competing remote-control technique called optogenetics, engineered neurons are activated upon receiving a pulse of light. That turns them on and off more quickly than with DREADDs, but the hardware required for delivering light to a spot in the brain is invasive and cumbersome.
We have been using DREADD receptor technology in a cell-specific manner to unravel the role of striatal circuits in neuropsychiatric disorders, such as drug addiction and obsessive–compulsive disorder.
More recently, we have examined the role of striatonigral neurons in a simple operant learning task. We found that transiently inhibiting activity of these neurons in the dorsal striatum of rats interfered with the acquisition of lever pressing for a sugar reward (see Figure 1), indicating that activation of the striatonigral pathway is required for action–outcome learning. This data suggests that dysregulation of striatal circuits may therefore contribute to the development of the aberrant reward and reinforcement learning that is common to many neuropsychiatric disorders.
We developed viral vectors that use neuropeptide promoters (dynorphin or enkephalin) to target DREADD receptor expression to specific cell populations in the striatum (striatonigral versus striatopallidal neurons, respectively).
originally posted by: MystikMushroom
That's just creepy.
You could "activate" someone to go into a complete mental blackout, hand them a gun, push them through the door and then when the DREADD wears off, they'd have no memory of what they did.
You could hide the receptor activating drug in food, a drink...
Beware of new "friends" I always say...
EDIT: Oh, and you know if this is just now being "discovered" -- it probably means they've been tinkering around with this in a DARPA lab someplace for a decade or more.
Several novel strategies using engineered receptors activated by synthetic ligands or by light have recently ushered in a new era of brain research that allows for precise experimental manipulation of neuronal activity.
Neuroscientists have perfected a chemical-genetic remote control for brain circuitry and behavior. This evolving technology can now sequentially switch the same neurons – and the behaviors they mediate – on-and-off in mice
originally posted by: MystikMushroom
a reply to: queenofswords
That's the thing...receptor activation regulates almost everything we do...
So instead of looking at a lock and trying to make a key that fits, we're just going to go ahead and create new locks and keys alltogether!
And, we can use a virus to make you "grow" these new receptors! A virus like this could spread world-wide and no one would know because it can't be tested for.
Don't get me wrong, this has immense positive application -- but it also has some terrifying potential negative uses. If this were used the wrong way, we could all be "switched on" to act morose, depressed, suicidal, or violent. You could wake up one day to find the world literally has gone "mad".
Okay, so who's to say that there hasn't been a lab containment breach and we're all infected with a DREADD virus and have no clue? All they'd have to do is "activate" it by putting something in the water, air, or food supply.
Targeting hunger-promoting neurons, the scientists made mice ignore food bowls or dive into them. Targeting movement neurons, they made mice scamper or stop.
I have a feeling this is the tip of a much larger iceberg. We humans are basically walking chemical reactions. Everything is regulated by a chemical process in our bodies.
And as I said, how would we ever know one of these viruses has infected us, giving us these new brain receptors? Put it into kids vaccines, and then the flu vaccine for adults. Pretty soon the entire 1st world population has it.
You could probably trigger black outs, memory lapses (or keep memory from being formed). It might make a good tool for abducting people. Perhaps this is how alien abductions work, they can literally switch "off" your ability to remember something, while paralyzing you at the same time. There could be receptors for body control in the brain.
Well there's a drug in S. America that makes people do whatever they're told. VICE did a documentary on it - I can't remember what it's called but people have been robbed blind and don't remember a thing afterward.
"Take us upstairs and let us have all your belongings and furniture"... "OK, sure.."
A guy says he woke up naked the next day and his neighbors said he came home with some strangers and began helping them move all his stuff out. They thought he was moving, but apparently not. He was drugged.
If a drug can do that -- this technology could as well. Remember, a drug simply "locks" into brain tissue receptors to illicit a feeling or behavior. If we construct artificial receptors that stimulate certain parts of the brain, we could make people hallucinate, hear things, black out, become suggestive...
And if we're already making rats hungry or not hungry -- imagine what they might have already done in top secret, black budget labs.
We could all have hidden landmine-receptors in our brains already and not even know it.