The human brain processes information at up to 79% energy efficiency, operating only 1.26 times above the theoretical Landauer limit, according to a new study published in National Science Review by Ma and Guo from Nanjing University of Aeronautics and Astronautics.
The Research
Moving past traditional models that view memory and computation as static synaptic states or isolated neuronal action potentials, the team modeled local functional circuits as parameterized digital neural ensembles within a multi-scale “neural sphere.” Their framework reveals that information is encoded in collective spatio-temporal electrical patterns governed by nonlinear dynamics, chaos, and fractal theory.
By simulating neural ensembles with different topological connections, initial potential states, and neuronal scales, the researchers found that neuronal populations generate rich periodic electrophysiological activities. These periodic potential waveforms act as dynamic carriers of information, rather than information being stored in isolated synapses or single neurons.
The study’s quantitative estimates are striking:
- Energy efficiency: 79% (1.26 times the Landauer limit)
- Maximum memory storage: 7.48 × 1018 bytes (about 7.5 exabytes), roughly 1,000 times higher than previous estimates
- Computational throughput: Up to 6.24 × 1018 FLOPS, equivalent to 78,000 high-performance GPUs
In contrast, modern semiconductor AI hardware exceeds the Landauer limit by a factor of 1 billion, highlighting immense potential for neuromorphic chip optimization.
Why It Matters
These findings suggest that your brain’s efficiency is not just about individual neurons firing, but about dynamic patterns of electrical activity across networks. This could explain why the brain performs complex tasks like pattern recognition and decision-making while using only about 20 watts of power. For you, this means that cognitive performance improvements may come from enhancing the brain’s ability to form and maintain these spatio-temporal patterns—through activities like learning new skills, musical training, or even certain brain training exercises.
What You Can Do
To support your brain’s natural efficient processing, engage in activities that promote neural network coordination: learn a new language, practice a musical instrument, or solve puzzles that require integrating multiple pieces of information. Consistent mental challenges can help maintain and potentially enhance the brain’s spatio-temporal coding capabilities.
Source: Neuroscience News
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