WordNet

of or belonging to neither the right nor the left politically or intellectually
a building dedicated to a particular activity; "they were raising money to build a new center for research" (同)centre
(American football) the position of the player on the line of scrimmage who puts the ball in play; "it is a centers responsibility to get the football to the quarterback"
a position on a basketball team of the player who participates in the jump that starts the game
the position on a hockey team of the player who participates in the face off at the beginning of the game
a place where some particular activity is concentrated; "they received messages from several centers" (同)centre
the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering (同)centre
the object upon which interest and attention focuses; "his stories made him the center of the party" (同)centre, center of attention, centre of attention
an area that is approximately central within some larger region; "it is in the center of town"; "they ran forward into the heart of the struggle"; "they were in the eye of the storm" (同)centre, middle, heart, eye
a point equidistant from the ends of a line or the extremities of a figure (同)centre, midpoint
a cluster of nerve cells governing a specific bodily process; "in most people the speech center is in the left hemisphere" (同)centre, nerve_center, nerve centre
(football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback; "the center fumbled the handoff" (同)snapper
(basketball) the person who plays center on a basketball team
(ice hockey) the person who plays center on a hockey team
politically moderate persons; centrists
the middle of a military or naval formation; "they had to reinforce the center"
move into the center; "That vase in the picture is not centered" (同)centre
equally distant from the extremes (同)halfway, middle, midway
in or to a high position, amount, or degree; "prices have gone up far too high"
a state of altered consciousness induced by alcohol or narcotics; "they took drugs to get a high on"
a state of sustained elation; "Im on a permanent high these days"
an air mass of higher than normal pressure; "the east coast benefits from a Bermuda high"
a lofty level or position or degree; "summer temperatures reached an all-time high"
a high place; "they stood on high and observed the countryside"; "he doesnt like heights" (同)heights
at a great altitude; "he climbed high on the ladder" (同)high up
used of sounds and voices; high in pitch or frequency (同)high-pitched
happy and excited and energetic (同)in high spirits
slightly and pleasantly intoxicated from alcohol or a drug (especially marijuana) (同)mellow
in a rich manner; "he lives high" (同)richly, luxuriously
(literal meaning) being at or having a relatively great or specific elevation or upward extension (sometimes used in combinations like `knee-high'
far up toward the source; "he lives high up the river"
greater than normal in degree or intensity or amount; "a high temperature"; "a high price"; "the high point of his career"; "high risks"; "has high hopes"; "the river is high"; "he has a high opinion of himself"
relating to or designed for or using the singing voice; "vocal technique"; "the vocal repertoire"; "organized a vocal group to sing his compositions"
full of the sound of voices; "a playground vocal with the shouts and laughter of children"
having or using the power to produce speech or sound; "vocal organs"; "all vocal beings hymned their praise"
a fractional monetary unit of several countries

PrepTutorEJDIC

『高い』,高い所にある / 《数の後に置いて》高さが…ある / (数量・程度などが標準より)『高い』,大きい,激しい / (身分・地位が)『高い』,高貴な / 『気高い』,高潔な / (声の調子が)『高い』,鋭い / 値段の高い,金の掛かる,ぜいたくな / 楽しい,陽気な,上得意の / (時・季節が)盛りの,たけなわの / (色が)濃い,赤い / 《話》(酒・麻薬などに)酔って / 『高く』,高い所に / (価値・程度などが)高く,高度に,激しく / 〈C〉《話》高水準,高値 / 〈U〉(自動車の)高速ギア / 〈C〉《話》(麻薬などによる)酔った状態
『声の』,音声の / 声に出す,口頭の / 《話》(意見などを)遠慮なくしゃべる,口やかましい / (ポピュラー歌手の)ボーカル
〈C〉『セント』(1ドルの1/100;米国・カナダの貨幣単位;《略》￠) / 〈C〉1セント銅貨 / 〈U〉(単位としての)100
《話》(あいさつとして)『やあ』,こんにちは / 《英》(注意を促す発声として)おい,ちょっと(hey)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/04/09 13:51:34」(JST)

wiki en

The HVC in the context of the song-learning pathway in birds.^[1]

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).^[2] 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,^[3] 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"^[4] HVC was established as the formal name for the region and no longer stands for anything.^[5]^[6]

Anatomy

HVC is located in the caudal nidopallium. It projects to the song motor pathway via the robust nucleus of the arcopallium (RA) and to the Anterior Forebrain Pathway via the basal ganglia nucleus Area X.^[1] It receives recurrent motor activity through the thalamic nucleus Uvaformis (Uva) and input from the auditory system through projections from the caudalateral mesopallium (CMM) and through the nucleus interfacialis (NIf).^[7] Three distinct types of neurons have been identified in HVC, each with unique anatomical and physiological properties: interneurons, RA-projecting cells(HVC_RA), and X-projecting cells (HVC_X)^[7]

References

^ ^a ^b Nottebohm, F. (2005). "The Neural Basis of Birdsong". PLoS Biology 3 (5): e164. doi:10.1371/journal.pbio.0030164. PMC 1110917. PMID 15884976. edit
^ Nottebohm, F.; Arnold, A. (1976). "Sexual dimorphism in vocal control areas of the songbird brain". Science 194 (4261): 211–213. doi:10.1126/science.959852. PMID 959852. edit
^ Reiner, A.; Perkel, D. J.; Mello, C. V.; Jarvis, E. D. (2004). "Songbirds and the Revised Avian Brain Nomenclature". Annals of the New York Academy of Sciences 1016: 77–108. doi:10.1196/annals.1298.013. PMC 2481519. PMID 15313771. edit
^ "Table 4. New Terminology for Neostriatum". 20 Aug 2012.
^ http://www.sciencedirect.com/science/article/pii/B0080448542008300
^ http://www.avianenrichment.com/mental_brainpower.htm
^ ^a ^b Mooney, R. (2009). "Neurobiology of song learning". Current Opinion in Neurobiology 19 (6): 654–660. doi:10.1016/j.conb.2009.10.004. PMID 19892546. edit

External links

High Vocal Center at the US National Library of Medicine Medical Subject Headings (MeSH)

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