Nzira yehutano yakarongeka nenzira yekunakidza. Mashoko anouya uye kubva muuropi "akafuratira," kuitira kuti rutivi rworuboshwe rweuropi ruchengetedze uye rugamuchire ruzivo kubva kuruboshwe rwomuviri. Saizvozvowo, rutivi rworuboshwe rwemuviri runodzorwa nerutivi rworudyi rweuropi.
Mitsipa mumutsipa wepelinha inotevera nzira dzakagadzirirwa apo dzinomhanyira kuuropi.
Mhando dzakafanana dzemutsotsi dzinomhanya pamwe chete mumutambo wakarongeka.
Somuenzaniso, mishonga inoona kudengenyeka, chiedza, uye nzvimbo (apo mutumbi uri munzvimbo) vose vanopinda mutambo wepelinha ndokukwira mune izvo zvinonzi dorsal columns kuenda kune uropi kune rumwe rutivi sechinhu chisina kuchengetwa. Nokuda kwegumbo roruboshwe, somuenzaniso, fiber inomhanya kune rumwe rutivi rworuboshwe rwemutsipa wepelinha. Pedyo ne-brainstem, kunyange zvakadaro, mafivha anoyambukira kune rumwe rutivi.
Izvi zvakafanana nemanzwiro akaita sangano remagetsi rinogadzira fiber rinotaura chikamu chemuviri kuti chifambe. Muhuropi, mafivha acho ari kune rumwe rutivi rwemuviri sechibvumirano chisina kuchena, asi anoshandura pane pasi pe brain brain. Somuenzaniso, rutivi rworuboshwe rwehuropi runotumira zviratidzo izvo zvino rwendo rworudyi rwomutsipa wepelinha tisati tabuda muruoko rworudyi. Rutivi rworuboshwe rweuropi, zvino, runodzora rutivi rworudyi rwemuviri.
Kusiyana neizvi, nhubu dzemawere dzinoona manzwiro akadai sekurwadziwa nekushisa hazviyambuki nechepasi peuropiyo asi panzvimbo iyo inopinda pedo nokukurumidza pavanopinda mutambo wepelinha kubva paruoko kana pamakumbo. Mafudzi ari kuruboshwe rworwonzi rwemumutsipa ane marwadzo uye kutonhora kwemitsipa yakasununguka kubva kuruoko rwerudyi nejoko.
Mafibhi anogona kukwira mashomanana vasati vayambuka, zvisinei.
Kuparadzanisa
Saka chii chinoitika kana hafu yepelinha ichikuvara? Kuputika kwehutundu kunosanganisira kudedera, kumira kwemavara, uye kuwanikwa kwakabva kune rumwe rutivi rwemuviri sechiremera. Kudzora kwemuviri kunoparadzwawo kune rumwe rutivi. Zvisinei, kurwadziwa uye kutonhora kunonzwa kucharasikirwa kubva kune rumwe rutivi rwemuviri, kazhinji kechipiri kana zvikamu zviviri pasi kubva mukukuvara.
Ichi chinoshamisa chakatanga kutsanangurwa naCharles Édouard Brown-Séquard muna 1850, avo vakatsanangura izvo zvino zvinozivikanwa seBrown-Séquard syndrome apo vaidzidza varimi vakakuvadzwa pavanenge vachichera shuga muRepublic of Mauritius. Chikonzero chinowanzovhiringidza chechirwere ichi chinoramba chichikuvadza chinokanganisa kune chikamu chekudzokera. Nemhaka yokuti ronda racho rinoda kunyatsosarura hafu yengarava, rinoramba risingabviri asi rinobatsira pakuratidza kushanda kwemutsipa wepelinha.
Kana mumwe munhu ane chirwere cheBruce-Séquard syndrome, imaginha ye magnetic resonance inogona kushandiswa kusimbisa chikonzero nenzvimbo yekukuvara. Mukuwedzera kumatambudziko, zvipembenene zvakadai sehutachiona, kuvhuvhuta, kana matumire zvinogona kutungamirira Brown-Séquard. Mushonga wacho uchaenderana nemamiriro ehutachiona.
Sources:
Hal Blumenfeld, Neuroanatomy kuburikidza neCliniki Cases. Sunderland: Sinauer Associates Publishers 2002.
Ropper AH, Samuels MA. Adams naVictor's Principles of Neurology, 9th ed: The McGraw-Hill Companies, Inc., 2009.