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  2. Brain size - Wikipedia

    en.wikipedia.org/wiki/Brain_size

    The size of the brain is a frequent topic of study within the fields of anatomy, biological anthropology, animal science and evolution.Measuring brain size and cranial capacity is relevant both to humans and other animals, and can be done by weight or volume via MRI scans, by skull volume, or by neuroimaging intelligence testing.

  3. Encephalization quotient - Wikipedia

    en.wikipedia.org/wiki/Encephalization_quotient

    The concept of encephalization has been a key evolutionary trend throughout human evolution, and consequently an important area of study. Over the course of hominin evolution, brain size has seen an overall increase from 400 cm 3 to 1400 cm 3. [42] Furthermore, the genus Homo is specifically defined by a significant increase in brain size. [43]

  4. Evolution of the brain - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_brain

    The evolutionary history of the human brain shows primarily a gradually bigger brain relative to body size during the evolutionary path from early primates to hominins and finally to Homo sapiens. This trend that has led to the present day human brain size indicates that there has been a 2-3 factor increase in size over the past 3 million years ...

  5. Homo habilis - Wikipedia

    en.wikipedia.org/wiki/Homo_habilis

    It has generally been thought that brain size increased along the human line especially rapidly at the transition between species, with H. habilis brain size smaller than that of H. ergaster / H. erectus, jumping from about 600–650 cc (37–40 cu in) in H. habilis to about 900–1,000 cc (55–61 cu in) in H. ergaster and H. erectus.

  6. Archaic humans - Wikipedia

    en.wikipedia.org/wiki/Archaic_humans

    Based on his analysis of the relationship between brain size and hominin group size, he concluded that because archaic humans had large brains, they must have lived in groups of over 120 individuals. Dunbar argues that it was not possible for hominins to live in such large groups without using language, otherwise there could be no group ...

  7. Homo naledi - Wikipedia

    en.wikipedia.org/wiki/Homo_naledi

    They are estimated to have averaged 143.6 cm (4 ft 9 in) in height and 39.7 kg (88 lb) in weight, yielding a small relative brain size, encephalization quotient, of 4.5. H. naledi brain anatomy seems to have been similar to contemporary Homo, which could indicate comparable cognitive complexity. The persistence of small-brained humans for so ...

  8. Australopithecus - Wikipedia

    en.wikipedia.org/wiki/Australopithecus

    The brains of most species of Australopithecus were roughly 35% of the size of a modern human brain [39] with an endocranial volume average of 466 cc (28.4 cu in). [13]

  9. Human brain - Wikipedia

    en.wikipedia.org/wiki/Human_brain

    The brain is the central organ of the human nervous system, and with the spinal cord, comprises the central nervous system. It consists of the cerebrum, the brainstem and the cerebellum. The brain controls most of the activities of the body, processing, integrating, and coordinating the information it receives from the sensory nervous system ...