Teaching ancient brains new tricks
New research shows how modern physicists think

Date:
October 11, 2021
Source:
Carnegie Mellon University
Summary:
Scientists have found a way to decode the brain activity associated
with individual abstract scientific concepts pertaining to matter
and energy, such as fermion or dark matter.



FULL STORY ==========================================================================
The science of physics has strived to find the best possible explanations
for understanding matter and energy in the physical world across all
scales of space and time. Modern physics is filled with complex concepts
and ideas that have revolutionized the way we see (and don't see) the
universe. The mysteries of the physical world are increasingly being
revealed by physicists who delve into non-intuitive, unseen worlds,
involving the subatomic, quantum and cosmological realms. But how do
the brains of advanced physicists manage this feat, of thinking about
worlds that can't be experienced?

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In a recently published paper in npj: Science of Learning, researchers at Carnegie Mellon University have found a way to decode the brain activity associated with individual abstract scientific concepts pertaining to
matter and energy, such as fermion or dark matter.

Robert Mason, senior research associate, Reinhard Schumacher, professor of physics and Marcel Just, the D.O. Hebb University Professor of Psychology,
at CMU investigated the thought processes of their fellow CMU physics
faculty concerning advanced physics concepts by recording their brain
activity using functional Magnetic Resonance Imaging (fMRI).

Unlike many other neuroscience studies that use brain imaging, this one
was not out to find "the place in the brain" where advanced scientific
concepts reside.

Instead, this study's goal was to discover how the brain organizes
highly abstract scientific concepts. An encyclopedia organizes knowledge alphabetically, a library organizes it according to something like
the Dewey Decimal System, but how does the brain of a physicist do it?
The study examined whether the activation patterns evoked by the different physics concepts could be grouped in terms of concept properties. One
of the most novel findings was that the physicists' brains organized
the concepts into those with measureable versus immeasurable size. Here
on Earth for most of us mortals, everything physical is measureable,
given the right ruler, scale or radar gun. But for a physicist, some
concepts like dark matter, neutrinos or the multiverse, their magnitude
is not measureable. And in the physicists' brains, the measureable versus immeasurable concepts are organized separately.

Of course, some parts of the brain organization of the physics professors resembled the organization in physics students' brains such as concepts
that had a periodic nature. Light, radio waves and gamma rays have a
periodic nature but concepts like buoyancy and the multiverse do not.



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But how can this interpretation of the brain activation findings be
assessed? The study team found a way to generate predictions of the
activation patterns of each of the concepts. But how can the activation
evoked by dark matter be predicted? The team recruited an independent
group of physics faculty to rate each concept on each of the hypothesized organizing dimensions on a 1-7 scale.

For example, a concept like "duality" would tend to be rated as
immeasureable (i.e., low on the measureable magnitude scale). A
computational model then determined the relation between the ratings and activation patterns for all of the concepts except one of them and then
used that relation to predict the activation of the left-out concept. The accuracy of this model was 70% on average, well above chance at 50%. This result indicates that the underlying organization is well-understood. This procedure is demonstrated for the activation associated with the concept
of dark matter in the accompanying figure.

Creativity of Thought Near the beginning of the 20th century,
post-Newtonian physicists radically advanced the understanding of space,
time, matter, energy and sub-atomic particles. The new concepts arose not
from their perceptual experience, but from the generative capabilities
of the human brain. How was this possible? The neurons in the human
brain have a large number of computational capabilities with various characteristics, and experience determines which of those capabilities
are put to use in various possible ways in combination with other brain
regions to perform particular thinking tasks. For example, every healthy
brain is prepared to learn the sounds of spoken language, but an infant's experience in a particular language environment shapes which phonemes
of which language are learned.

The genius of civilization has been to use these brain capabilities
to develop new skills and knowledge. What makes all of this possible
is the adaptability of the human brain. We can use our ancient brains
to think of new concepts, which are organized along new, underlying
dimensions. An example of a "new" physics dimension significant in 20th century, post-Newtonian physics is "immeasurability" (a property of dark matter, for example) that stands in contrast to the "measurability"
of classical physics concepts, (such as torque or velocity). This new
dimension is present in the brains of all university physics faculty
tested. The scientific advances in physics were built with the new
capabilities of human brains.

Another striking finding was the large degree of commonality across
physicists in how their brains represented the concepts. Even though
the physicists were trained in different universities, languages
and cultures, there was a similarity in brain representations. This
commonality in conceptual representations arises because the brain
system that automatically comes into play for processing a given
type of information is the one that is inherently best suited to that processing. As an analogy, consider that the parts of one's body that
come into play to perform a given task are the best suited ones: to catch
a tennis ball, a closing hand automatically comes into play, rather than
a pair or knees or a mouth or an armpit. Similarly, when physicists are processing information about oscillation, the brain system that comes
into play is the one that would normally process rhythmic events, such
as dance movements or ripples in a pond. And that is the source of the commonality across people.

It is the same brain regions in everyone that are recruited to process
a given concept.

So the secret of teaching ancient brains new tricks, as the advance of civilization has repeatedly done, is to empower creative thinkers to
develop new understandings and inventions, by building on or repurposing
the inherent information processing capabilities of the human brain. By communicating these newly developed concepts to others, they will
root themselves in the same information processing capabilities of the recipients' brains as the original developers used. Mass communication
and education can propogate the advances to entire populations. Thus the
march of science, technology and civilization continue to be driven by
the most powerful entity on Earth, the human brain.

The project was funded by the Office of Naval Research and the National
Science Foundation.

========================================================================== Story Source: Materials provided by Carnegie_Mellon_University. Note:
Content may be edited for style and length.


========================================================================== Journal Reference:
1. Robert A. Mason, Reinhard A. Schumacher, Marcel Adam Just. The
neuroscience of advanced scientific concepts. npj Science of
Learning, 2021; 6 (1) DOI: 10.1038/s41539-021-00107-6 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2021/10/211011110826.htm

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