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Updated: Jun 17, 2026
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A Comparative Approach for Quantitative Cell Counting Studies in Widely Different Mammalian Brains
Published on: January 16, 2026
The counting function and its representation in the parietal cortex in humans and animals
M E Varga1, O G Pavlova, S V Nosova
1Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.
Neuroscience and Behavioral Physiology
|December 25, 2009
Summary
Number perception and basic math skills exist in humans and animals before speech develops. These abilities, involving the parietal cortex, are crucial for adaptive behavior and evolved over time.
Area of Science:
- Cognitive Neuroscience
- Comparative Psychology
- Evolutionary Biology
Background:
- Numerical cognition is present in humans and animals prior to language acquisition.
- Behavioral studies reveal number perception, quantity discrimination, and basic arithmetic in preverbal infants and various animal species.
- Evolutionary and developmental timelines indicate these numerical abilities precede speech development.
Purpose of the Study:
- To investigate the evolutionary origins and neurobiological underpinnings of numerical cognition.
- To compare number processing mechanisms across species, including humans, primates, and canids.
- To establish the role of the parietal cortex in numerical assessment and adaptive behavior.
Main Methods:
- Behavioral observation and analysis in infants and animals.
- Clinical studies of counting impairments in human patients.
- Functional neuroimaging (e.g., fMRI) in humans to map number operations.
- Neurobiological studies in animal models (monkeys, dogs) to identify brain regions involved.
Main Results:
- Number perception and basic arithmetic skills emerge early in ontogeny and phylogeny.
- Discrimination of quantities follows Weber's law: easier with larger differences, harder with smaller differences, and more difficult with larger numerosities.
- Parietal cortex is identified as the key brain region for number processing in humans, with similar areas implicated in monkeys and dogs.
- Cross-species similarities in morphofunctional bases of numerical behavior suggest a shared evolutionary origin.
Conclusions:
- Numerical cognition is a fundamental, evolutionarily conserved mechanism.
- The parietal cortex plays a critical role in processing numerical information across diverse species.
- Counting behavior serves as an adaptive mechanism shaped by evolutionary pressures.
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