In a lab at MIT, a rat enters a T-shaped maze, hears a tone, and runs down the left arm towards a piece of chocolate. It’s a habit. The rat has done the same thing over so many days that once it hears the tone, it’ll run in the same direction even if there’s no chocolate to be found. Humans are driven by similar habits. Every morning, I hear my alarm go off, put some clothes on, and shamble into the kitchen to brew some coffee.
Habits, by their very nature, seem permanent, stable, automatic. But they are not, and the MIT rat tells us why. Earlier, Kyle Smith had added a light-sensitive protein to one small part of its brain – the infralimbic cortex (ILC). This addition allows Smith to silence the neurons in this one area with a flash of yellow light, delivered to the rat’s brain via an optic fibre. The light flashes for just three seconds, and the habit disappears. The rat hears the tone, but no longer heads down the chocolate arm.
The experiment shows that even though habits seem automatic, they still depend on ongoing supervision from the ILC and possibly other parts of the brain. They’re ingrained and durable, but subject to second-by-second control. And they can be disrupted in surprisingly quick and simple ways.
“We were all stunned by how immediate and on-line these effects really are,” says Smith. “Changing the activity of this small cortex area could profoundly change how habitual behaviour was, in a matter of seconds.”
By cutting out bits of a rodent’s brain, or inactivating them with chemicals, other scientists had already identified parts of the brain, including the ILC, that are important for habits. But these are somewhat clumsy methods. Smith’s team wanted some more refined, something that could inactivate the ILC on demand for short bursts of time.
They turned to optogenetics. This revolutionary technique takes light-sensitive proteins from around the tree of life, and uses viruses to introduce them into an animal’s neurons. By choosing the right protein, and targeting the right part of the brain, scientists can now excite or silence a chosen group of neurons with astounding precision, using little more than flashes of coloured light.
Working with supervisor Ann Graybiel and optogenetics founder Karl Deisseroth, Smith filled his rats’ ILCs with halorhodopsin – a protein that comes from salt-loving microbes, and silences neurons when hit by yellow light.
Smith then trained rats to run down one arm of his T-shaped maze towards some chocolate, or down the other towards a sugary drink. One tone set them off, and a second one told them which arm to run down. After days of practice, the habits became ingrained. Even when Smith started “devaluing” one of the rewards by lacing it with a nauseating chemical, the rat would still run towards it the next time it was tested, even if it didn’t drink. That’s a habit – a behavioural reflex. The tone sets off a chain of actions, regardless of what the rat gets out of them.
VOTER FRAUD: Was the Scottish Independence Referendum Rigged to Fail? 2014 09 20
Was voter fraud committed during the Scottish Independence referendum?
It has been confirmed that the names of 10 people were already crossed off a voter list prior them voting inside a polling station.
According to reports, the Glasgow City Council confirmed that there were ten cases of suspected electoral fraud occurring at polling stations following the Scottish referendum vote on the 18th. ...
Scandinavians Split Over Syrian Influx 2014 09 20
This exemplifies the insanity of Scandinavia.
The narrow victory of the left-leaning Social Democratic Party in Sweden’s elections last Sunday marked a broad shift in its politics. But a new coalition government is unlikely to reconsider one of the country’s most challenging policies: its response to the Syrian civil war. Sweden has taken an open-door approach to people fleeing the conflict, ...
The Israel lobby in United Kingdom - Who Runs Britain? 2014 09 20 Who runs British politics? Who in Britain supports all the wars the UK has been involved in?
The Israel Lobby in the UK - Full Documentary By Peter Oborne from Dispatchees
Links from Youtube:
Zionist attack on western civilization
Reed Douglas - The Controversery of Zion
The cowardice at the heart of UK relationship with Israel
Close friends and allies: Prime Minister David Cameron ...
Another Palestinian Mass Grave Discovered, Evidence of Massacre 2014 09 20 Another mass grave discovered, evidence of 1948 Judaic holocaust by bullets, knives and bludgeons against Palestinians.
The Israeli military admits to have been surprised by the abilities of Palestinian resistance fighters during its recent war on the Gaza Strip.
A top Israeli military official says he’s impressed by the training of Palestinian resistance fighters from Hamas and the Islamic Jihad groups. He ...
Russian Media to be owned by Russians 2014 09 20 Comment: Russian media by and for Russians? Wow, revolutionary!
I guess they are stick of foreign oligarchs and zionist with dual citizenship.
Duma seeks limits on foreign ownership of Russian media companies
A group of opposition lawmakers have prepared a bill that orders Russian mass media companies to have at least 80 percent of their stock held by Russian investors.
The bill is backed ...