Pacini Corpuscles: Kodi Olandira Awa Ndiotani Ndipo Amagwira Ntchito Bwanji

Zamkati

• Mtundu wama mechanoreceptor wogawidwa pakhungu lonse ndi ziwalo zosiyanasiyana zamkati.
• Kodi Pacini corpuscle ndi chiyani?
• Amagwira ntchito yanji?
• Ali kuti ndipo ndi otani?
• Njira yogwirira ntchito

Mtundu wama mechanoreceptor wogawidwa pakhungu lonse ndi ziwalo zosiyanasiyana zamkati.

Mitengo ya Pacini ndi amodzi mwamitundu inayi yama mechanoreceptors omwe amalola mphamvu yakukhudza, mwa anthu komanso mitundu ina ya mammalian.

Tithokoze maselowa titha kuzindikira kupsinjika ndi kunjenjemera pakhungu lathu, kukhala kofunikira kwambiri pozindikira zowopsa zathupi komanso mbali zina tsiku lililonse monga kutenga zinthu m'chilengedwe.

Zitha kuwoneka kuti kukhala ocheperako samadzipereka kwambiri, komabe, ma neuroscience adalankhula nawo bwino kwambiri, chifukwa ndiwofunikira pamakhalidwe athu komanso pakupulumuka kwathu, ndiye kuti, kuchokera pakuwona kwa Psychology ndi Biology. Tiyeni tiwone zomwe timagulu ting'onoting'ono tonsefe timachita m'chiwalo chathu chachikulu, khungu.

Kodi Pacini corpuscle ndi chiyani?

Kupatula lingaliro losavuta kuti anthu ali ndi mphamvu zisanu, pali chowonadi: pali njira zosiyanasiyana zomwe zimatidziwitsa zomwe zikuchitika mthupi lathu komanso mthupi lathu. Nthawi zambiri, pansi pa dzina la "kukhudza" angapo mwa iwo amakhala m'magulu, ena mwa iwo amatha kupanga zochitika zosiyana kwambiri wina ndi mnzake.

Mitengo ya Pacini, yotchedwanso lamellar corpuscles, ndi imodzi mwa mitundu inayi yama mechanoreceptors yoyang'anira mphamvu yakukhudza, wopezeka pakhungu la munthu. Amakhudzidwa kwambiri ndi kukakamizidwa komanso kugwedezeka komwe kumatha kuchitika pakhungu, mwina pokhudza chinthu kapena zochita za munthu wina. Maselowa adatchulidwa ndi omwe adawapeza, Filippo Pacini, katswiri wazomangamanga ku Italy.

Mitembo imeneyi, ngakhale imapezeka pakhungu lonse, imapezeka mokulira m'malo omwe tsitsi silipezeka, monga zikhatho za manja, zala ndi zidendene za mapazi. Amakhala ndi kuthekera kofulumira kwambiri kuti azolowere kutengeka ndi thupi, kulola chizindikiritso chofulumira kutumizidwa ku dongosolo lamanjenje koma kumachepa pang'onopang'ono chifukwa cholimbikitsacho chikupitilizabe kukumana ndi khungu.

Chifukwa cha mtundu uwu wamaselo, anthu amatha azindikire mawonekedwe azinthu monga mawonekedwe ake, kukhathamira, kuwonjezera pakupereka mphamvu yoyenera kutengera ngati tikufuna kugwira kapena kumasula chinthu chomwe chikufunsidwacho.

Amagwira ntchito yanji?

Matupi a Lamellar kapena Pacini ndi maselo omwe amayankha pakukhudzidwa ndikumatha kusintha mwachangu komwe kungachitike. Ichi ndichifukwa chake ntchito yake yayikulu ndikuwona kugwedezeka pakhungu, kuphatikiza pakusintha kwamphamvu komwe minyewa iyi imatha kulandira.

Pakhungu pakasinthasintha kapena kuyenda mwamphamvu, mitemboyo imatulutsa zotheka m'mitsempha yam'mimba, potumiza chizindikiro ku mitsempha yomwe imatha kufikira kuubongo.

Chifukwa cha chidwi chawo chachikulu, matupi amenewa imatha kuzindikira kuthamanga kwakanthawi pafupi ndi 250 hertz (Hz). Izi, kuti mumvetsetse, zikutanthauza kuti khungu la munthu limatha kuzindikira kusuntha kwa tinthu tating'onoting'ono pafupi ndi micron imodzi (1 μm) kukula kwake. Komabe, kafukufuku wina wanena kuti amatha kuyambitsidwa ndi magwiridwe a 30 mpaka 100 Hz.

Ali kuti ndipo ndi otani?

Kapangidwe, magulu a Pacini kukhala ndi mawonekedwe owulungika, nthawi zina ofanana kwambiri ndi a silinda. Kukula kwake kuli mozungulira millimeter kutalika kapena kuchepera.

Maselowa amapangidwa ndi mapepala angapo, omwe amatchedwanso lamellae, ndipo ndichifukwa chake dzina lawo lina ndi lamellar corpuscle. Magawo awa amatha kukhala pakati pa 20 ndi 60, ndipo amapangidwa ndi ma fibroblasts, mtundu wama cell wolumikizana, ndi minofu yolumikizana yoluka. Ma lamellae samalumikizana mwachindunji, koma amalekanitsidwa ndi zigawo zoonda kwambiri za collagen, zosasinthasintha komanso madzi ambiri.

A mitsempha ya mitsempha yotetezedwa ndi myelin amalowa m'munsi mwa mtembo, womwe umafikira pakatikati pa seloyo, umakhala wolimba komanso wonyezimira pamene ukulowa mthupi. Kuphatikiza apo, mitsempha yambiri yamagazi imalowanso kudzera mbali yakumunsiyi, yomwe imalowa m'magawo osiyanasiyana omwe amapanga makinawa.

Mitengo ya Pacini zili mu hypodermis ya thupi lonse. Mbali iyi ya khungu imapezeka mkatikati mwa minyewa, komabe imakhala ndi magulu osiyanasiyana a mandimu malinga ndi dera la thupi.

Ngakhale amatha kupezeka pakhungu laubweya komanso lonyezimira, ndiye kuti, khungu lomwe lilibe tsitsi, amakhala ochulukirapo m'malo opanda tsitsi, monga zikhatho za manja ndi mapazi. Pamenepo, Mitembo pafupifupi 350 imapezeka pachala chilichonse cha manja, ndipo pafupifupi 800 pachikhatho.

Ngakhale zili choncho, poyerekeza ndi mitundu ina yamaselo okhudzana ndi mphamvu yakukhudza, maselo a Pacini amapezeka ochepa. Tiyeneranso kunena kuti mitundu itatu yama cell touch, ndiye kuti a Meissner, Merkel ndi Ruffini ndi ochepa kuposa a Pacini.

Ndizosangalatsa kutchula kuti mitembo ya Pacini imatha kupezeka pakhungu laumunthu, komanso muzinthu zina zamkati zamthupi. Maselo a Lamellar amapezeka m'malo osiyanasiyana monga chiwindi, ziwalo zogonana, kapamba, periosteum, ndi mesentery. Amanenedwapo kuti maselowa amatha kugwira ntchito poyang'ana kugwedezeka kwamakina chifukwa chakuyenda m'matumbawa, kuzindikira kulira kwapafupipafupi.

Njira yogwirira ntchito

Mitembo ya Pacini imayankha potulutsa zikwangwani ku dongosolo lamanjenje lamellae lawo likapunduka. Kusintha kumeneku kumapangitsa kusokonekera komanso kukakamiza khungu la malo opumira kuti zichitike. Mofananamo, nembanemba iyi imakhala yopunduka kapena yokhota, ndipo ndipamene chizindikirocho chimatumizidwa kumalo amanjenje, msana ndi ubongo.

Chizindikiro ichi chili ndi kufotokozera kwamagetsi. Monga chotupa cha cytoplasmic cha sensor neuron deforms, njira za sodium, zomwe zimakhala zovuta kuthamanga, zimatseguka. Mwanjira imeneyi, ma ayoni a sodium (Na +) amatulutsidwa mu synaptic space, ndikupangitsa kuti nembanemba ya cell iwonongeke ndikupanga zomwe zingachitike, zomwe zimapangitsa chidwi cha mitsempha.

Mitembo ya Pacini yankhani malinga ndi momwe kupanikizika kumakhalira pakhungu. Ndiye kuti, kukakamizidwa kwambiri, zizindikiritso zamitsempha zimatumizidwa. Ndi chifukwa chake timatha kuzindikira pakati pa kupsinjika kosalala ndi kufinya komwe kumatha kutipwetekanso.

Komabe, palinso chodabwitsa china chomwe chingawoneke ngati chosemphana ndi izi, ndikuti popeza ali olandila mwachangu kuti athetse zovuta, patangopita nthawi yochepa amayamba kutumiza zizindikilo zochepa ku dongosolo lamanjenje. Pachifukwa ichi, komanso patadutsa nthawi yochepa, ngati tikukhudza chinthu, mfundo imafika pomwe kukhudzako kumakhala kochepa; chidziwitso sichimathandizanso, patatha mphindi yoyamba yomwe timadziwa kuti zenizeni zomwe zimatulutsa chidwi chimenecho zilipo ndipo zimatikhudza nthawi zonse.