A SYSTEMATIC RELATIONSHIP BETWEEN BRAIN SIZE INCREASE AND LARYNX TRANSFORMATION DURING HOMINIZATION

摘要: In the present work we suggest that laryngeal descent in neck during hominization is not per se evidence of an early specific selective pressure on speech production, but can be explained as a morphofunctional consequence various splanchno- and neuro-cranial rearrangements caused by extreme prefrontal cortex size increase hominization. The physiology bone deposition reallocation processes cranium ontogeny are investigated, using developmental, comparative, paleontological clinical evidence, most cranial rearrangements, typical modem humans, systemic adjustments to include large braincase. A single, strong, could primary cause including into neck. Once larynx descended, then, often happens, natural selection acted opportunistically reinforced its use what eventually became component efficient organ. Humans speak, because for change position larynx, have store, process analyze quantity information from environment. With inefficient would speak differently, “speech” all same. On contrary, with perfect no brain increase, still primate just some parrot-like capabilities.