Question

Why did the evolution of segmentation help increase brain size?

Answer 1

If we suppose that biological intelligence in greater organisms is the result of procedures of complicated sensory information processing and mental faculties that are accountable for planning, executing, and evaluating intelligent behaviour, differences in intelligence species must be observed in the neural substrate in theory. The complexity of the neural circuitry of the cerebral cortex in greater species, particularly in primates, is regarded to be the neural correlation of the coherence and predictive power of the brain, and thus a measure of intelligence. Indeed, the cerebral cortex's evolutionary development is one of the most characteristic morphological characteristics of mammalian brains. The brain becomes disproportionately composed of this cortical structure, particularly in species with big brains, and particularly in big apes and marine mammals.

Neocortex evolution in primates is primarily defined by the growth and multiplication of neuron clusters that are heavily interconnected and close to each other. As these clusters of neurons are organized in vertical columns, the uptick in the number and complexity of the neuronal networks will be reflected by the expansion of the cortical surface area beyond that expected for geometrically similar brains. The cortical surface area therefore develops fractally towards a volume with growing brain size. The capacity of brain adaptation is apparent not from the unorganized accumulation of neurons, but from mutual interaction through the self similar compartmentalization and centralized organisation of neural circuits and the discovery of cortical folding, which eliminates interconnective axonal ranges. Competitive conditions for high communication and short lead lag will naturally lead to the primate neo-cortex's observed structure. Apparently, high synaptic activation and brief conductive delays help the brain functionally. The primate brain's architecture is such that it can perform a vast number of complex tasks with reduced energy and resource consumption in both task execution and device development. There will usually be a variety of appropriate models for an object, all of which will be equal to practical purposes. The similarities in brain architecture among primates, including humans, suggests that brain functions were externally restricted by related species and that the primate brain could only develop within a small number of potential types. This means that inner brain development factors may be the key determinants that inhibit brain evolution and that anatomical similarities between organisms in brain functional structure may be inherited from a common ancestor rather than developing directly in response to specific environmental conditions.