Eric Emerson Schmidt once said, “People assume computers will do everything that humans do. Not good. People differ from each other, and they are all really different from computers.” There have been debates on the fundamental nature of the human brain and its similarities and differences with computers. The debates result from the scientific attempt to understand the human brain and replicate its functionality and capability into computer systems. Although the brain-computer metaphor has been dominant in the neuroscience field for a long time, cognitive neuroscience research presents various ways in which the human brain differs from computers. Let us take a moment and look at some differences below.
Energy Efficiency
The human
brain’s energy consumption is less than that of a computer. The brain is over
ten times more energy-efficient than computer systems. It requires about ten
watts to function, while a computer requires over one hundred watts to run. The
human brain improves its energy efficiency by storing memories in an initially
transient form. There is a myth that humans only use ten percent of their brain
capacity. Most of the brain’s neurons remain inactive for a long time, waiting
to be activated. If the number of neurons activated at any given time is
tripled, the oxygen requirements would increase significantly. Keeping most
neurons inactive makes the human brain more energy-efficient than modern
computers. However, the energy efficiency in computers will improve
progressively with advancements in technologies.
Storage Capacity
Another
significant difference between the human brain and a computer is that the human
brain processes more information than current computers. In the early 21st
century, the internet was compared to a single brain of a human being. However,
today, there has been significant progress in computer systems development such
that computers can outperform humans in activities that we equate with smarts,
such as calculating square roots and playing chess or checkers. Despite such
technological breakthroughs, which have left humans wondering whether they will
soon battle robots for survival, the human brain still has a massive storage
capacity than any computer in the world. An average adult’s brain can store
trillions of bytes of information. According to a Scientific American study,
the human brain has an equivalent of 2.5 petabytes of memory capacity. This
means that the capacity of an average adult human brain can hold about 2.5
million gigabytes of information. Such enormous storage capacity is more than
what a modern single computer can hold, giving the brain more capabilities than
humans can imagine.
Processing speed
In terms of
processing speed, computers have a Central Processing Unit with a fixed
processing speed. This differs from a human brain’s processing speed, which is
not fixed. The brain’s speed in processing information is subject to various
factors, such as the speed at which electromagnetic signals can move through
various neuron parts, synaptic efficacy differences, neurotransmitters
availability, and many other factors. As a result, the human brain’s speed can
vary from one person to another and from time to time. Based on the speed of
basic operations, computers are more advantaged over the human brain. Modern
computers can perform a simple arithmetic operation at speeds of 10 billion
operations per second. The human brain can perform the same arithmetic
operation about ten million times slower than the computer. Human brains are
less disadvantaged in terms of precision of basic operations compared to
computers. Computers can represent numbers using any required precision based
on the binary digits assigned to each number. Most numbers in the human nervous
system have variability that results from factors such as biological noise.
Reliability
Computers
have limits. Although there has been significant progress in Artificial
Intelligence to mimic the human brain, it is difficult to replicate every
feature of the brain. Much of what has been achieved today is the development
of computer systems that can help humans complete their jobs easily and
efficiently. The human brain has various features that make them more reliable
than computers. For example, the brain is self-maintaining, self-organizing,
and self-correcting. On the other hand, computers perform monotonous jobs. They
cannot maintain themselves, cannot correct themselves, and do not have the
potential to self-organize. This means that computers cannot be used as a
substitute for the human brain. Maybe future technological developments will achieve
systems that function entirely as the human brain, but as of today, computer
systems are not very reliable as the human brain. They can only help human
beings to complete complex tasks quickly and efficiently.
Conclusion
Despite the
brain-computer metaphor being dominant in the neuroscience field because of
various similarities, the human brain has many features that distinguish it
from a computer. The brain is better in terms of energy efficiency. Its storage
capacity is higher than any computer available in the world today. However,
computers have better processing speeds than the human brain, especially when
dealing with simple arithmetic operations. Lastly, human brains are more
reliable than computers because they can maintain, correct, and organize
themselves. Computers lack such capabilities.
Author: Prince Andrew Livingstone Zutah | Software Engineer | Member, Institute of ICT Professionals Ghana
For comments, contact andrewp@palztechnologies.com | +233544111100
Source: www.iipgh.org
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