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HVC (avian brain region)
HVC (formerly, hyperstriatum ventrale, pars caudalis (HVc), and high vocal center) is a nucleus in the brain of the songbirds (order passeriformes) necessary for both the learning and the production of bird song. It is located in the lateral caudal nidopallium and has projections to both the direct and the anterior forebrain pathways.
It is notable that both of the other orders of birds that learn song, the hummingbirds and parrots, also seem to have structures similar to HVC. Since it is believed that all three of these groups independently derived the ability to learn song, it is believed that these other HVC-like structures are examples of homoplasy.
==Name==
HVC was originally called the hyperstriatum ventrale, pars caudalis (HVc). Later neuroanatomy revealed this name to be incorrect, however, and many researchers referred to it as the high vocal center due to its important function in vocal learning. When the nomenclature of the avian brain was officially revised in 2004, these names were officially dropped in order to correct the historical inaccuracies. As there was "No easy solution for correcting original naming error for this structure"〔(【引用サイトリンク】Table 4. New Terminology for Neostriatum )〕 HVC was established as the formal name for the region and no longer stands for anything.〔http://www.avianenrichment.com/mental_brainpower.htm〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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