- 関
- cross、crossing over、intersect、intersection
WordNet
- trace a line through or across; "cross your `t"
- any affliction that causes great suffering; "that is his cross to bear"; "he bears his afflictions like a crown of thorns" (同)crown_of_thorns
- a wooden structure consisting of an upright post with a transverse piece
- extending or lying across; in a crosswise direction; at right angles to the long axis; "cross members should be all steel"; "from the transverse hall the stairway ascends gracefully"; "transversal vibrations"; "transverse colon" (同)transverse, transversal, thwartwise
- to cover or extend over an area or time period; "Rivers traverse the valley floor", "The parking lot spans 3 acres"; "The novel spans three centuries" (同)traverse, span, sweep
- fold so as to resemble a cross; "she crossed her legs"
- meet and pass; "the trains crossed"
- a point or set of points common to two or more geometric configurations
- a junction where one street or road crosses another (同)crossroad, crossway, crossing, carrefour
- the act of intersecting (as joining by causing your path to intersect your targets path)
- a point where lines intersect (同)intersection point, point of intersection
- the set of elements common to two or more sets; "the set of red hats is the intersection of the set of hats and the set of red things" (同)product, Cartesian product
- meet at a point (同)cross
PrepTutorEJDIC
- 〈C〉(昔,罪人のはりつけの刑に用いた)『十字架』 / 《the C-》キリストがはりつけになった十字架;キリスト教の象徴としての十字架 / 〈C〉十字(キリスト教徒が右手で切る) / 〈C〉イエスのために耐える苦しみ,受難 / 〈C〉十字架像;(紋章などの)十字形 / 〈C〉キリスト教信仰;《集合的に》キリスト教徒 / 〈C〉十字記号(crisscross)(+または×) / 〈C〉《修飾語を伴って》十字勲章 / 《『the Cross』》南十字星(the Southern Cross) / 〈C〉(動物・植物の)(…間の)異種交配;雑種《+『between』+『名』+『and』+『名』》 / 〈C〉(ボクシングの)クロスパンチ / (信仰のしるしとして)〈人・自分〉‘に'『十字を切る』 / …'を'『交差させる』(『する』) / …‘に'『交差させて線を引く』;《英》〈小切手〉‘に'線引きする;…'を'横線(×印)をつけて消す《+『名』+『out』(『off』),+『out』(『off』)+『名』》 / …'を'『横切る』,横断する,渡る / 〈心〉'を'よぎる,‘に'ふと浮かぶ / …‘と'すれ違う,行き違う / …'を'妨げる,‘の'じゃまをする / …'を'交配する / 『交差する』,交わる / (…へ)『横切る』,渡る《+『over to』+『名』》 / すれ違いになる / 〈動物・植物が〉交配する,雑種になる / おこりっぽい,ふきげんな / (風が)反対の / 十文字に交差した,横切った
- 〈C〉(特に道路の)交差点 / 〈U〉交差
- …‘を'横切る,交差する / 〈線などが〉交わる
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/07/29 01:48:11」(JST)
[Wiki en表示]
Not to be confused with Desiccation.
Section of the medulla oblongata at the level of the decussation of the pyramids.
Decussation is used in biological contexts to describe a crossing. (In Latin anatomical terms the form decussatio is used, e.g. decussatio pyramidum.) In anatomy the term chiasma or chiasm means nearly the same as decussation.
Examples include:
- In the brain, where nerve fibers obliquely cross from one lateral part to the other, that is to say they cross at a level other than their origin. See for examples Decussation of pyramids and sensory decussation. Decussation describes the point where the nerves cross from one side of the brain to the other, and typically the nerves from the left side of the body decussate to the right side of the brain and the nerves from the right side of the body decussate to the left brain, however depending on the function of the nerves the level of decussation is variable.
- In botanical leaf taxology, the word decussate describes an opposite pattern of leaves which has successive pairs at right angles to each other (i.e. rotated 90 degrees along the stem when viewed from above). In effect, successive pairs of leaves cross each other. Basil is a classic example of a decussate leaf pattern.
Decussate phyllotaxis of
Crassula rupestris
- In tooth enamel, where bundles of rods cross each other as they travel from the enamel-dentine junction to the outer enamel surface, or near to it.
In this "true bug", Dysdercus decussatus, in the family Pyrrhocoridae, the specific epithet refers to the bandolier-like markings on the back.
- In taxonomic description where decussate markings or structures occur, names such as decussatus or decussata or otherwise in part containing "decuss..." are common, especially in the specific epithet.[1]
Contents
- 1 Evolutionary significance
- 2 See also
- 3 References
- 4 Further reading
Evolutionary significance
After the origin of the nervous system, in the course of evolution from invertebrate to vertebrate, the nerve cord moved from the ventral side (side towards the belly) to the dorsal side (side towards the back). It is believed that in this process, the decussation arose with a 180° shift with respect to the brain.[2][3]
See also
References
- ^ Jaeger, Edmund Carroll (1959). A source-book of biological names and terms. Springfield, Ill: Thomas. ISBN 0-398-06179-3.
- ^ Kinsbourne, M (Sep 2013). "Somatic twist: a model for the evolution of decussation.". Neuropsychology. 27 (5): 511–5. PMID 24040928. doi:10.1037/a0033662.
- ^ Dixon, A. Francis (31 May 2014). "Why are the great motor and sensory tracts of the central nervous system crossed?". The Dublin Journal of Medical Science. 124 (1): 1–4. doi:10.1007/BF02972358.
Further reading
- Why does the nervous system decussate?: Stanford Neuroblog
UpToDate Contents
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English Journal
- Decussation as an axial twist: A comment on Kinsbourne (2013).
- de Lussanet MH1, Osse JW.
- Neuropsychology.Neuropsychology.2015 Sep;29(5):713-4. doi: 10.1037/neu0000163. Epub 2014 Dec 22.
- One of the great mysteries of the brain, which has puzzled all-time students of brain form and function, is the contralateral organization of the forebrain and the crossings of its major afferent and efferent connections. As a novel explanation, two recent studies have proposed that the rostral part
- PMID 25528610
- Opalski syndrome caused by vertebral artery dissection.
- Uchida Y1, Kobayashi S, Takada K, Tsugu Y.
- Rinshō shinkeigaku = Clinical neurology.Rinsho Shinkeigaku.2015 Jul 24;55(7):497-500. doi: 10.5692/clinicalneurol.cn-000705. Epub 2015 May 22.
- A 52-year-old man developed sudden occipital headache followed by vomiting and vertigo. On admission, he displayed right Horner syndrome with ipsilateral reduced facial sensation to pain and temperature that crossed in the body, affecting the left limbs. In addition, he had right hemiparesis. Diffus
- PMID 26004259
- Unilateral foveal hypoplasia in a child with bilateral anterior segment dysgenesis.
- Shields RA1, Cavuoto KM1, McKeown CA1, Chang TC1.
- Clinical case reports.Clin Case Rep.2015 Jul;3(7):676-8. doi: 10.1002/ccr3.319. Epub 2015 Jun 13.
- In patients with foveal hypoplasia, anterior segment dysgenesis and an absence of systemic findings, consider a recently described syndrome of foveal hypoplasia, optic nerve decussation defects and anterior segment dysgenesis (FHONDA) in the differential diagnosis.
- PMID 26273469
Japanese Journal
- 拡散テンソル画像が病態理解に有用であった両側性小脳性運動性失調で発症した中脳正中部梗塞の1例
- 椎骨動脈解離によりOpalski症候群を呈した1例
- 椎骨動脈解離によりOpalski症候群を呈した1例
Related Links
- Decussation is used in biological contexts to describe a crossing. (In Latin anatomical terms the form decussatio is used, e.g. decussatio pyramidum) In anatomy the term chiasma or chiasm means nearly the same as decussation. [1
- decussation [de″kus-sa´shun] a crossing over; the intercrossing of fellow parts or structures in the form of an X. decussation of pyramids the anterior part of the lower medulla oblongata in which most of the fibers of each pyramid ...
★リンクテーブル★
[★]
- 関
- crossbred、crossbreeding、crossing、crossing over、crosslink、crossreact、decussation、hybridization、hybridize、intersect、intersection、pass、pass through、passage、transect、transit、transversal、transverse
[★]
- 横切ること、横断、交差。(道路の)交差点。(数)交差、交わり。(数)共通部分、共通分(を求める計算)
- 関
- cross、crossing over、decussation、intersect
[★]
- 関
- cross、crossing over、decussation、intersection
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- 英
- decussation
- 関
- 手指腱交叉
[★]
錐体交叉
- 関
- corticobulbar tract、corticospinal tract、pyramidal tract
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ウェルネキンク交叉