page_title: Decussation
hierarchical_section_title: Decussation
caption_attribution_description: Afrikaans: Sosatiebos, Crassula rupestris Thunb. (Crassulaceae), Klein Karoo, Ladismith, Kannaland, Wes-Kaap, Suid-Afrika Català: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Cap Occidental, Sud-àfrica Čeština: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Západní Kapsko, Jihoafrická republika Dansk: Kinesiske penge Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Vest-Kapprovinsen, Sydafrika Deutsch: Felsendickblatt Crassula rupestris Thunb. (Crassulaceae), Kleine Karoo, Ladismith, Gemeinde Kannaland, Westkap, Südafrika English: Kebab Bush, Concertina Bush, Crassula rupestris Thunb. (Crassulaceae), Little Karoo, Ladismith, Kannaland, Western Cape, South Africa Esperanto: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Okcidenta Kablando, Sud-Afriko Español: Crassula rupestris Thunb. (Crassulaceae), El Pequeño Karroo , Ladismith, Kannaland, Provincia Occidental del Cabo, Sudáfrica Eesti: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Lääne-Kapimaa, Lõuna-Aafrika Vabariik Suomi: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Western Cape, Etelä-Afrikka Français&#160;: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Cap-Occidental, d'Afrique du Sud Galego: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Cabo Occidental, Sudáfrica Magyar: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, , Dél-afrikai Köztársaság Italiano: Crassula rupestris Thunb. (Crassulaceae), Piccolo Karoo, Ladismith, Kannaland, Western Cape, Sudafrica Lëtzebuergesch: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Westkaap, Südafrika Lietuvių: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Vakarų Kapas, Pietų Afrikos Respublikos Nederlands: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, West-Kaap, Zuid-Afrika Norsk bokmål: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Western Cape, Sør-Afrika Polski: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Prowincja Przylądkowa Zachodnia, Republika Południowej Afryki Português: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Cabo Ocidental, África do Sul Русский: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Западная Капская провинция, Южно-Африканская Республика Slovenčina: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Západné Kapsko , Republika Južna Afrika Slovenščina: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Zahodna Kaplandija, Republika Južna Afrika Svenska: Crassula rupestris Thunb. (Crassulaceae), Ladismith, Kannaland, Västra Kapprovinsen, Sydafrika
context_page_description: Decussation is used in biological contexts to describe a crossing. In Latin anatomical terms, the form decussatio is used, e.g. decussatio pyramidum.
  Similarly, the anatomical term chiasma is named after the Greek uppercase 'Χ'. Whereas a decussation refers to a crossing within the central nervous system, various kinds of crossings in the peripheral nervous system are called chiasma.
  Examples include:
  In the brain, where nerve fibers obliquely cross from one lateral side of the brain 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. In neuroanatomy, the term chiasma is reserved for crossing of- or within nerves such as in the optic chiasm.
  In botanical leaf taxology, the word decussate describes an opposite pattern of leaves which has successive pairs at right angles to each other. In effect, successive pairs of leaves cross each other. Basil is a classic example of a decussate leaf pattern.
  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.
context_section_description: Decussation is used in biological contexts to describe a crossing (in Latin, the roman numeral for ten, deca, is an uppercase 'X'). In Latin anatomical terms, the form decussatio is used, e.g. decussatio pyramidum. 
  Similarly, the anatomical term chiasma is named after the Greek uppercase 'Χ' (chi). Whereas a decussation refers to a crossing within the central nervous system, various kinds of crossings in the peripheral nervous system are called chiasma.
  Examples include:
  In the brain, where nerve fibers obliquely cross from one lateral side of the brain 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. In neuroanatomy, the term chiasma is reserved for crossing of- or within nerves such as in the optic chiasm.
  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. 
  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 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.
caption: Decussate phyllotaxis of Crassula rupestris
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