Stimulating Neural Circuits with Magnetism

Brain stimulation might sound like some Frankensteinian demonstration from a Victorian science fair. But in reality, it is a contemporary technique making a huge impact in neuroscience by addressing a longstanding limitation of traditional methods for investigating human brain function. Such techniques, like EEG and fMRI, can only be used to infer the effects of a stimulus or task on brain activity, and not vice versa. For example, a scientist might use EEG to study the effect of a task like arm movement on brain activity, but how can one study the effect of brain activity on arm movement?Continue reading

Hacking your Brain with Smart Drugs

What if you could take a pill to enhance your cognitive abilities?  What if this pill could help you ace a test, get more work done efficiently, and truly multitask?  For entrepreneurs in Silicon Valley and executives on Wall Street, the answer to these questions is a resounding “Yes!”  In these high stake environments, the use of nootropics, or “smart drugs,” by normal healthy people has become commonplace.  But what exactly are the compounds that are claimed to improve brain function?  And are they safe?Continue reading

How Do We Know? The Value of Scientific Models.

Last month, astronomers announced the prediction of a new giant planet in our solar system dubbed Planet IX, a genuine ninth planet with ten times the mass of Earth.  The announcement lead to some confusion on the Internet as to the whether the planet had actually been discovered.  In fact, no direct observation of this planet has been made. Rather, the planet has been predicted by a model, a simplified description of a system which often incorporates hypothetical elements to explain the variance in data.  Because many models use equations to describe a system, a model can often be thought of as a theory with a mathematical backbone.Continue reading

Is the brain smarter than a computer?

Is the Brain Smarter than a Computer?

Knowing Neurons is proud to present our inaugural entry in a new series of YouTube videos!  In this episode, Joel asks, “Is the brain smarter than a computer?”  With Joel as our tour guide, we embark on a journey through neurobiology, psychology, supercomputing, quantum physics, and even philosophy, all the while stopping on the street to ask the common person for thoughts and opinions.  Along the way, you’ll learn in what ways humans outperform computers, in what ways computers outperform humans, how the world’s most powerful supercomputers are simulating the human brain, the limits of human memory, how chess grandmasters memorize chess positions, what information in your brain is accessible to your conscious mind, and what it means to live in a simulation.

Buckle your seat belts, sit back, relax, and enjoy the show!Continue reading

The Turing Test: Is that Human or Machine?

I propose to consider the following question, ‘Can machines think?’

Thus begins Alan Turing’s paper “Computing machinery and intelligence.”  It’s 1950 England, and the world’s first computer is being used to calculate the next known largest prime number, a feat meant to show off the power of the computer.  For Turing, the implications of this work go much further and spark a philosophical question: could computers one day acquire cognitive abilities rivaling human intelligence?Continue reading

The emotional mechanics of the robot-human interaction

The emotional mechanics of the robot-human interaction

First impressions are pivotal.  While reading another person’s cues, an abridged version of them forms as we draw on complex social inferences in merely seconds of interaction.  That is, if they are human.  What if they only resemble a human, but are incapable of inner experience or independent thought?  Is it possible to truly form an emotional connection with a robot?Continue reading

CRISPR-Cas9 Knowing Neurons

CRISPR-Cas9: Targeted Genome Editing

CRISPR_Updated_FINAL_size

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Infographic by Jooyeun Lee and Kate Fehlhaber.

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References:

Hsu P. & Feng Zhang (2014). Development and Applications of CRISPR-Cas9 for Genome Engineering, Cell, 157 (6) 1262-1278. DOI: http://dx.doi.org/10.1016/j.cell.2014.05.010

Fineran P.C. (2014). Gene regulation by engineered CRISPR-Cas systems, Current Opinion in Microbiology, 18 83-89. DOI: http://dx.doi.org/10.1016/j.mib.2014.02.007

Doudna J.A. (2014). The new frontier of genome engineering with CRISPR-Cas9, Science, 346 (6213) 1258096-1258096. DOI: http://dx.doi.org/10.1126/science.1258096