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Evolution of Nervous Systems & Human Brain: Language Evolution and Adaptation

Explore the evolution of nervous systems, vertebrate brains, human lineage, and language development. Learn how cortical commitment and brain size increased throughout evolution, leading to the adaptation of language in humans.

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Evolution of Nervous Systems & Human Brain: Language Evolution and Adaptation

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  1. Evolution of Nervous Systems • radial nerve • nerve net • segmental nerve • ganglion • nervous system

  2. Vertebrate Brain Evolution • midbrain emphasis decreases • forebrain emphasis increases • cerebellar emphasis increases

  3. The Human Lineage

  4. Human Evolution and Brain Size Increases

  5. Varied Cortical Commitment Association Areas Increase with Evolution

  6. Varied Cortical Surface Area

  7. Genetics and Evolution Modern Day Chimpanzee Modern Day Human

  8. Evolution of Language Chimpanzee Human High in throat Low in throat • A random mutation causes the larynx to drop in human ancestor • This increases the complexity of sounds that the species could make • Couple this with a more complex brain and we have the advent of language • And the evolution of the species based on cognition and language

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