Category: Article

Top Five Traits of Extraterrestrial Intelligence

February 27th, 2015 in Article, Pop Culture 0 comments

Once upon a time, Rick went off to school in a bright sunny morning, and his parents waved goodbye before giving him his lunchbox. Then, he met his friends which he was excited for because together they will go to a bowling party. His friends were rather different because they were foreigners who would attend the Terran Orientation event since they don’t know anything about our homelan- I mean, homeworld.

I would certainly love to be in an alternate setting where the aliens as intelligence as us visit and coexist with us peacefully like how we deal with different nations. Unfortunately, some theorize that aliens would be more powerful than us leading to catastrophic events for humans like the relationship between the conquistadores and the Native Americans from the New World. However, that does not stop any writer from theorizing what would be the most fundamental requirements for an intelligent alien to travel throughout the galaxy. I present to you the top ten list for an intelligently extraterrestrial life from the neuroscientist’s perspective.

  1. The alien must be able to hold objects. Without any way to hold objects by appendages, the alien cannot create technology to transport far away from space. It would be nearly impossible to travel to outer space without any protection because natural selection would almost never lead to intergalactic journeys since from the beginning the resources are available on the planet itself. Therefore, the alien has to learn to use inorganic tools to create a capsule-like setting to travel to outer space.
  2. The amount of resources are “just right” for the selective pressure to kick in. When the resources are ubiquitous for the alien, there is no need to be intelligent with problem-solving skills because the resources are there for you. Thus, there has to be a time for the alien when there is lack of resources leading to the emergence of analytical intelligence. Of course, the nutrients have to be rich enough for the aliens to survive.
  3. The alien has to be sociable with others. Teamwork is always a great method for problem-solving and according to neurobiology, asocial creatures tend to be less intelligent than social ones.
  4. The atmosphere of the environment which the alien breathes in has to be gaseous. The reason that a fish cannot travel to outer space is because it is too hard to create an aquatic environment in a space-vessel. Liquid is too dense and space-consuming to build an aquarium rocket. Gases on the other hand are readily available in some regions of space and the chemical formula is easier to synthesize when the alien is outside the terrestrial atmosphere.
  5. The alien has to be able to use ethical reasoning. What distinguishes a primitive life from more advanced ones is that some organisms use higher cognitive reasoning to figure out problems to escape unusual dilemmas. In fact, what makes humans different from other creatures is that we have prefrontal cortex, a region of the brain that governs ethical reasoning and executive functions. Ethical reasoning is what made us develop technologies to improve our civilizations, so it would not be surprising for an alien to have the same trait.

I must be careful in my argument because we have never seen any extraterrestrial life. What I will conclude, however, is that aliens whether they exist or not would probably face the same hardships like we did throughout history, leading to possible coexistence when we run across them.

-By Dongjun (Rick) Yoo

Sources:

NE101 Class taught by Dr. Wayne Korzan, Fall Semester 2013

Facts on Animal Intelligence: http://interesting-animal-facts.com/Intelligent-Animals-Facts/Intelligent-Animals-Facts.shtml

Orangutan Spearfishing: http://primatology.net/2008/04/29/orangutan-photographed-using-tool-as-spear-to-fish/

Brain Rules by John Medina

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Is iPhone Separation Anxiety Real?

February 25th, 2015 in Article, News 0 comments

iPhone-Separation-Anxiety-1Have you ever searched for a ringing phone, feeling your anxiety increase with each ring? Or experienced a mini heart attack when you thought you lost your phone only to discover it was in a different pocket? Most older generations would criticize you for being so obsessed with technology, but recent studies have shown that ‘iPhone separation anxiety’ is a real disorder – and it is plaguing the younger generations of today’s society.

The average person spends about two hours and fifty-seven minutes on a smartphone or tablet every day. Most of us get stressed out if we misplace our phone, are constantly checking for notifications, and even feel ‘phantom vibrations’ – a sensation that we have received a notification when we really have not. Most people would dismiss this anxiety as an unhealthy obsession with technology, but research has shown that these feelings are legitimate and smartphone separation can have serious psychological and physiological effects.

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Optogenetics: Using Light to Turn Memories On and Off

February 16th, 2015 in Article, News 0 comments

Scientists have known about rhodopsins that are responsible for sensing light for a while. What if there was a way to insert those rhodopsins inside neurons? That’s exactly what scientists were experimenting with in the early 2000s and it’s this idea that lead to the birth of optogenetics.  By taking the DNA of channel rhodopsins from algae and inserting them into the membrane of neurons, scientists were able to make neurons sensitive to particular wavelengths of light. Channel rhodopsin and halorhodopsin are among the opins inserted into neurons by injecting viruses. Channel rhodopsin activates neurons while halorhodopsin silences them. Once the neuron expresses the light-gated cation channel channelrhodopsin-2 in its cells membrane, shining light on it for as little as a few milliseconds has a profound effect. It causes the opening of the channelrohodopsin-2 molecules, allowing positively charged ions to enter cell and cause the cell to fire.

Check out this video to see how optogenetics works.

Many experiments today use optogenetics to selectively turn neurons on and off in mice. What makes this method mind blowing is the high spatial and temporal resolution it gives scientists when working with the brain. It can be used on neurons in on a petri dish or within a living animal.  It could be used to learn more about the function of particular brain regions. For instance, one could temporarily inactivate one region to observe how it impacts activity in other connected brain regions.

Furthermore, it’s minimally invasive: once the virus containing the rhodopsin has been injected, all the scientist needs to do is shine a pulse of light. Researchers at Stanford have used optogenetics to induce muscle contractions in mice. At Case Western Reserve University, researchers implemented it to restore motor function in rats paralyzed by spinal cord injuries. Could optogenetics be used to recover vision loss, something most humans deal with as they age? Experiments conducted on mice with a lack of photoreceptors shows that shining light on bipolar cells (containing channelrhodopsin-2) causes action potentials to fire in the visual cortex. It would be amazing if scientists could overcome biomedical and technical obstacles to make this work in humans too.

Across the river at MIT, members of the Tonegawa lab have taken the technique of optogenetics one step further. Steve Ramirez and Xu Liu have been working to localize memories in the brain and activate them with a light “switch”. And they have accomplished this feat in mice. Promising experiments with mice suggest optogenetics can be used to turn off traumatizing memories and activate pleasant once. This could have implications for PTSD, where horrific memories could be suppressed. They also have experimented with the idea of implanting false memories into the brain, which they call “Project Inception.” For more information on this work (and a good laugh), check out Steve Ramirez and Xu Liu’s TED talk.

Seems to me like optogenetics is a promising technique that can lead to breakthroughs in neuroscience.

-Srijesa K.

Sources

[1] “The Birth of Optogenetics” http://www.the-scientist.com/?articles.view/articleNo/30756/title/The-Birth-of-Optogenetics/

[2] “Potential Benefits of Optogenetics” http://optogenetics.weebly.com/what-is-it1.html

 

 

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The Miracle of Neurogenesis

November 19th, 2014 in Article, News 0 comments

Neurogenesis occurs in two areas in the human adult: in the dentate gyrus of the hippocampus and in the olfactory system. The hippocampus is vital to learning new information and memory consolidation, thus it makes sense that new neurons need to be born in that region. The olfactory system is needs neurogenesis to process to new information. Majority of neurogenesis actually occurs during prenatal development. In fact humans initially have more neurons that necessary for survival. Apoptosis (programmed cell death) occurs to prune the synapses established during early development.

Many studies have been conducted that investigate ways to increase neurogenesis. Such activities include voluntary physical exercise or being in enriched environments. Experiments with rats have shown that being in an enriched environment where rats are exposed to complex objects, toys, running wheels, etc. spark improvements in performance of tasks measuring levels of learning and memory. For humans, I suppose an enriched environment could be a place involving novel stimuli or

If you think about it, how could neurogenesis be bad? I mean people with neurodegenerative diseases suffer from the consequences of neuronal loss, right? However, according to a study published in May 2014 in Science, exercise could induce amnesia. An article regarding this study states, “Adult mice that exercised on a running wheel after experiencing an event were more likely than their inactive mates to forget the experience.” Thus it appears that the neurogenesis that occurs during exercise may be “wiping out” neurons that encoded previous memories. Furthermore, when neurogenesis was pharmacologically inhibited scientists observed a recall failure in the rats. This article relates this phenomenon to the fact that children cannot form long term memories until they are 3-4 years of age.

Despite controversy about neurogenesis, olfactory ensheathing cells (OECs) have been used to help a paralyzed man walk once again.  An article published in October in BBC News describes how doctors in Poland accomplished this feat. The first step to this process was to extract cells from the patient’s olfactory bulbs (they removed one olfactory bulb and grew the cells in culture). Two weeks later the cells were implanted in the areas surrounding the spinal cord damage the patient had experienced. This action allowed the spinal cord cells to regenerate because the nerve grafts acted “as a bridge to cross the severed cord.” The implications of this type of surgery are pretty amazing – it could work wonders for paralyzed veterans/other individuals and people dealing with dysfunctions relevant to spinal cord damage.

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Sources:

Effects of environmental enrichment and voluntary exercise on neurogenesis, learning and memory, and pattern separation: BDNF as a critical variable – ScienceDirect

Exercise Can Erase Memories – The Scientist

Paralyzed Man Walks Again After Cell Transplant – BBC

- Srijesa K.

 

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Is the brain the only place that stores our memories?

November 11th, 2014 in Article, Opinion 0 comments

Do you ever think about your childhood or replay an event in your head that happened 15 years ago but its so vivid that it seems like it happened yesterday? Do you ever hear something and think it sounds like your favorite song and then start singing that song? These are memories that were formed in your brain that are replayed as a result of a specific stimulus. For a long time scientists believed that memories were formed, processed, and sent to different destinations in the brain. Dr. Wilder Penfield was one of the first to accidentally discover this. In the 40s he electrically stimulated different areas of his patients’ brains while they were under local anesthesia and found that the region he stimulated would elicit specific memories in the patient’s life (see video below). For example, in one of his patients he stimulated her temporal lobe (auditory cortex) and she started to hum her favorite song out loud. This suggested that the memory of this song was stored in the place where it was processed or originated (i.e. the auditory cortex processed the first time she listened to the song). Penfield concluded that the cortex (the outer layers of the brain) stored the “complete record of the stream of consciousness; all those things in which a man was aware at any time…” Until recently, scientists have believed this phenomenon.

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Stockholm Syndrome Explained by the Stanford Prison Experiment

October 29th, 2014 in Article 0 comments

Stockholm Syndrome can be referred to as a joke in the popular culture, and many people do not take it seriously as much as other common psychiatric problems such as PTSD, a psychological illness usually caused by a traumatic event like physical aggression. It cannot be treated seriously because there is no medical standard to properly diagnose a person with “Stockholm Syndrome.” However, this supposed illness is a real problem that affects the minority of people who are abducted usually by criminals who have no interest in the hostage’s safety.

The first recorded case of hostages with Stockholm Syndrome was during a bank robbery in Stockholm, Sweden. In August 23 to 28, 1973, the bank robbers negotiated with the police to leave the bank safely. While trying to form an agreement, the majority of the captive bank employees were unusually sympathetic towards the robber, and, even after being set free, refused to leave their captors. The criminologist and the psychiatrist who were investigating the robbery coined the term for their conditions “Stockholm Syndrome.”

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Guess Who?

October 17th, 2014 in Article 0 comments

Telling apart identical twins can be embarrassingly difficult at first, so it’s pretty nice to be able to tell apart the rest of the population from one another. But what about those people we see that we give a second glance because they resemble a classmate? Or what about stunt doubles? In the movies, stunt doubles resemble the main actors so closely that we can’t see the difference. But in real life, if we saw Johnny Depp and his stunt double side by side, we would easily be able to see who’s who. This is because of the way the brain recognizes faces.

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Keep Calm And Neuroscience On

October 3rd, 2014 in Article 0 comments

It’s every student’s favorite time of the semester: midterm week. As you are freaking out about the upcoming exams that you have, you notice that others around you are relatively calm. You envy them and their ability to cope with stress. But here’s the thing: keeping calm under pressure isn’t a character trait or ability, it’s a skill that you can teach yourself in minutes. You’re probably thinking that that sounds ridiculous, but by following a few simple steps one can easily improve one’s ability to manage stress.

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Video Games Can Read Your Emotions

April 29th, 2014 in Article, Pop Culture 0 comments

Using technology similar to that found in a lie detector, Corey McCall, a Stanford University doctoral candidate, is creating a video game controller that registers signals about a players respiration, pulse, and perspiration. In Gregory Kovacs’s lab, in association with Texas Instruments, a prototype was constructed.

As a player gets more excited, all of signals the device registers change. Consider physical activity or watching an interesting movie, surprising these have similar autonomous nervous responses. As your interest or involvement increases your respiration rate decreases, pulse increases, and perspiration increases.
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Study Suggests Possible Connection Between TBI and Homelessness

April 28th, 2014 in Article, News 0 comments

Many homeless men have suffered a traumatic brain injury in their life, according to a recent study conducted by researchers at St. Michael’s Hospital.

 After collecting data from over 100 men aged 27 to 81 from a shelter in downtown Toronto, researchers found that nearly half of the homeless men surveyed had suffered a traumatic brain injury. Of those who had suffered a traumatic brain injury, 87 percent experienced the injury prior to becoming homeless.

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