Pacini Corpuscles: Menene Waɗannan Masu karɓa kuma Ta yaya suke Aiki?

Wadatacce

• Nau'in injin injinan da aka rarraba ko'ina cikin fata da gabobin ciki daban -daban.
• Menene gawarwakin Pacini?
• Wace rawa suke takawa?
• Ina suke kuma yaya suke?
• Injin aiki

Nau'in injin injinan da aka rarraba ko'ina cikin fata da gabobin ciki daban -daban.

Bakin Pacini suna ɗaya daga cikin nau'ikan injiniyoyi huɗu waɗanda ke ba da damar taɓa taɓawa, duka a cikin mutane da sauran nau'ikan dabbobi masu shayarwa.

Godiya ga waɗannan sel zamu iya gano matsin lamba da rawar jiki akan fatar jikin mu, kasancewa da mahimmancin mahimmanci yayin gano duka barazanar barazanar jiki da kuma a fannoni na yau da kullun kamar ɗaukar abubuwa daga muhalli.

Yana iya zama kamar ƙanƙantar da kansu ba sa ba da kansu da yawa, duk da haka, neuroscience ya yi magana da su sosai, tunda sun dace da halayenmu da cikin rayuwar mu, wato, daga mahangar Ilimin halin Ilimin halin ɗan Adam da Ilimin Halittu. Bari mu ga abin da waɗannan ƙananan tsarukan da dukkan mu muke yi a cikin mafi girman gabobin mu, fata.

Menene gawarwakin Pacini?

Bayan ra'ayin sauƙaƙawa cewa ɗan adam yana da azanci guda biyar, akwai gaskiyar: akwai mafi yawan hanyoyin hanzari waɗanda ke sanar da mu abin da ke faruwa a cikin muhallin mu da cikin jikin mu. Yawanci, a ƙarƙashin lakabin "taɓawa" da yawa daga cikinsu an haɗa su, wasu daga cikinsu suna iya samar da gogewa daban -daban daga juna.

Pacini corpuscles, wanda kuma ake kira lamellar corpuscles, sune ɗaya daga cikin nau'ikan injiniyoyi huɗu masu kula da ma'anar taɓawa, da ake samu a fatar mutum. Suna da matukar damuwa da matsin lamba da rawar jiki wanda zai iya faruwa akan fata, ko dai ta taɓa abu ko ta hanyar wani motsi na mutum. An sanya wa waɗannan sel suna bayan mai binciken su, ɗan asalin Italiyanci Filippo Pacini.

Waɗannan gawawwaki, ko da yake an same su ko'ina cikin fata, ana samun su da yawa a wuraren da ba a samun gashi, kamar tafin hannu, yatsu da tafin ƙafa. Suna da saurin sauri don daidaitawa da abubuwan motsa jiki, suna ba da damar aika siginar sauri zuwa tsarin juyayi amma a hankali yana raguwa yayin da motsawar ke ci gaba da hulɗa da fata.

Godiya ga irin wannan sel, ɗan adam na iya gano fannonin zahiri na abubuwa kamar ƙirar saman su, kauri, ban da yin amfani da ƙarfin da ya dace dangane da ko muna son kwace ko sakin abin da ake magana akai.

Wace rawa suke takawa?

Lamellar ko Pacini corpuscles sune sel waɗanda ke amsa ƙoshin ƙoshin lafiya da yuwuwar canje -canjen da za su iya faruwa a ciki. Shi ya sa babban aikinsa shi ne gano rawar jiki a cikin fata, baya ga canje -canje a matsin da wannan nama zai iya samu.

Lokacin da akwai nakasa ko motsi mai girgizawa a cikin fata, gawarwakin suna fitar da yuwuwar aiki a tashar jijiya, don haka aika siginar zuwa tsarin juyayi wanda ke ƙarewa zuwa kwakwalwa.

Godiya ga babban hankalinsu, waɗannan gawarwakin zai iya gano girgizawar mitar kusa da 250 hertz (Hz). Wannan, don fahimta, yana nufin fatar ɗan adam tana da ikon gano motsi na barbashi kusa da micron ɗaya (1 μm) a girma akan yatsan yatsa. Koyaya, wasu karatun sun nuna cewa suna iya kunna su ta hanyar girgiza a cikin kewayon 30 zuwa 100 Hz.

Ina suke kuma yaya suke?

A tsari, gawarwakin Pacini suna da siffar oval, wani lokacin ma yayi kama da na Silinda. Girmansa yana kusa da milimita a tsayi fiye ko lessasa.

Wadannan sel an yi su da zanen gado da yawa, wanda kuma ake kira lamellae, kuma saboda wannan dalili ne sauran sunan su shine guntun lamellar. Waɗannan yadudduka na iya kasancewa tsakanin 20 zuwa 60, kuma sun ƙunshi fibroblasts, nau'in sel mai haɗawa, da nau'in haɗin haɗin fibrous. Lamella ba su da hulɗa kai tsaye da juna, amma ana raba su da yadudduka na collagen, tare da daidaitaccen gelatinous da babban adadin ruwa.

A fiber jijiyoyin da myelin ke karewa yana shiga sashin ƙasa na corpuscle, wanda ke isa tsakiyar ɓangaren sel, yana yin kauri da ƙima yayin da yake shiga cikin gawar. Bugu da ƙari, jijiyoyin jini da yawa kuma suna ratsawa ta wannan ƙananan ɓangaren, wanda reshe ya shiga cikin yadudduka daban -daban na lamellar da ke yin injin ƙira.

Bakin Pacini suna cikin hypodermis na jiki duka. Ana samun wannan fatar fatar a cikin mafi zurfin nama, duk da haka yana da yawa daban -daban na guntun lamellar dangane da yankin jiki.

Kodayake ana iya samun su a cikin fatar gashi da kyalli, wato fatar da ba ta da gashi, sun fi yawa a wuraren da ba su da gashi, kamar tafin hannu da ƙafa. A gaskiya, ana iya samun gawarwaki kusan 350 a kan kowane yatsan hannu, da kusan 800 a tafin.

Duk da wannan, idan aka kwatanta da sauran nau'ikan ƙwayoyin sel masu alaƙa da ke da alaƙa da taɓawa, ana samun ƙwayoyin Pacini a cikin ƙananan rabo. Ya kamata kuma a ce sauran nau'ukan sel guda uku na taɓawa, wato, na Meissner, Merkel da Ruffini sun fi na Pacini ƙanana.

Yana da ban sha'awa a ambaci gaskiyar cewa ba za a iya samun gawarwakin Pacini a cikin fatar ɗan adam kawai ba, har ma a cikin wasu ƙarin tsarin ciki na jiki. Ana samun sel Lamellar a wurare iri -iri kamar hanta, gabobin jima'i, pancreas, periosteum, da mesentery. An yi hasashen cewa waɗannan sel za su sami aikin gano rawar jiki na injin saboda motsi a cikin waɗannan gabobin musamman, gano ƙananan sautunan mitar.

Injin aiki

Gawarwakin Pacini suna amsawa ta hanyar fitar da sigina ga tsarin juyayi lokacin da lamellae su ta lalace. Wannan nakasa yana haifar da nakasa duka da matsin lamba akan membran tantanin halitta na tashar azanci. Bi da bi, wannan membrane ya lalace ko lanƙwasa, kuma a lokacin ne ake aika siginar jijiya zuwa tsarin jijiyoyi na tsakiya, duka kashin baya da kwakwalwa.

Wannan siginar tana da bayani na lantarki. Yayin da membrane na cytoplasmic na neuron na jijiya ke lalacewa, tashoshin sodium, waɗanda ke da matsin lamba, suna buɗe. Ta wannan hanyar, ions sodium (Na +) ana sakin su a cikin sararin synaptic, yana haifar da ɓarkewar tantanin halitta ya lalata kuma ya haifar da yuwuwar aikin, yana haifar da motsawar jijiya.

Sunan mahaifi Pacini amsa daidai gwargwadon matsin lambar da ake yi akan fata. Wato, mafi yawan matsin lamba, ana aika ƙarin siginar jijiya. A saboda haka ne muke iya rarrabewa tsakanin taushi mai taushi da taushi da matsi wanda zai iya cutar da mu.

Koyaya, akwai kuma wani sabon abu wanda zai iya zama kamar ya saba da wannan gaskiyar, kuma shine tunda sun kasance masu karɓa don saurin daidaitawa zuwa abubuwan motsa jiki, bayan ɗan gajeren lokaci sai su fara aika ƙarancin sigina zuwa ga tsarin juyayi na tsakiya. A saboda wannan dalili, kuma bayan ɗan gajeren lokaci, idan muna taɓa abu, ma'ana ta isa inda taɓawarsa ta zama ƙasa da hankali; wannan bayanin ba shi da amfani sosai, bayan lokacin farko da muka san cewa gaskiyar abin da ke haifar da wannan abin jin daɗin yana nan kuma yana shafar mu koyaushe.