I-Biomechanism yokubeletha ngeentlobo ezahlukeneyo zokubonisa

I-biomechanism yokubeleka iyonke isethi yentlukwano ehlukeneyo ukuba umntwana oza kuzalwa angenza. Ezi ntshukumo zihambelana ngqo nesakhiwo se- pelvis. Ziquka ukuhamba / ukunweba kwentloko yomntwana, ukujikeleza kwayo kwinqanaba le-axis, ukunyuka kwentloko ye-fetal head and pendulum movements ejolise kwinkqubela yayo kunye nomsele wokuzalwa.

Zonke ezi ntshukumo zinikwe ubungakanani kunye nokuma kwentsimbi yomfazi, ubukho be-amniotic fluid ngokwaneleyo, ushizi omanzi owugubungela umzimba womntwana, okunciphisa ukutshatyalaliswa, kunye nobukhulu nomlo wekhanda lomntwana. Ukongezelela, i-biomechanism yabasebenzi ihlinzekwa ngumsebenzi wesibeleko, ngokuchanekileyo, ngokuchasene kwayo. Oku kubangela ukunyakaza okuqhubela phambili ekuqhubekeni komntwana ngokuhamba komama. Into eyongezelelweyo ebangela ukuba kuncitshiswe i-uterus yilezi zixhobo ezixilisayo. Kule meko, i-circular ligaments idonsa i-uterine ephantsi ukusuka phambili, kwaye iigram-uterine ligaments zigcinwe, zingavumeli ukuba zilahleke, zilungise phantsi kwesikram.

I-biomechanism yezabasebenzi kwintetho yentloko ye-fetus (occipital) iqulethwe kwezi zilandelayo zilandelayo: ukuhamba kwekhanda kunye nokunyusa kwayo kwi-pelvis encinci. Xa intloko igobile, inqaku elikhokelayo lichongiwe - i-fontanelle encinci efikelela kwi-wireline ye-pelvis. Yile ngongoma ebonakalayo yokuqala yezocalulo zesini. I-fetal chin ngexesha elifanayo isondela kwisifuba. Ekuqaleni inhloko itshintsha utshintsho lwayo. Ukongeza, xa uhamba ukusuka ebanzi ukuya kwincinci encinci ye-pelvis encinci, yenza ukukhutshwa. Emva koko ubuso bujoliswe kwi-sacrum, nentamo ukuya kwi-symphysis. Kwaye ekugqibeleni, intloko iyaqhubeka kwaye ishiya indiza yepilvis - ibunzi, ubuso kunye nesigxina sokugqibela sizalwa. Emva kokuzalwa, intloko ithatha isikhundla sayo sokuqala. Emva koko ii-hangers zizalwe kwaye umntwana sele ukhutshwa ngokupheleleyo.

I-biomechanism yezabasebenzi kwinkcazo ye-pelvic nayo iqukethe ukunyakaza okujikelezayo kunye nokuguqulela, kuphela kule meko umntwana uhamba phambili kunye neendlela zokhokho. Ingongoma ephezulu yenkcazo yintlupheko yomthamo. Ezi zilandelayo zihlandlo ezenza i-biomechanism yokuzalwa: izibonda zifakwe kwi-pelvis encinci kwaye zihambe kunye nayo, umlenze we-fetus wenza i-bendal lateral, emva koko i-trunk kunye ne-humerus bazalwa. Ukulandelelana kwentloko yesisu kunye nokujikeleza kwangaphakathi kwenzeka phantse. Intloko izalwe kwisimo esifanelekileyo.

I-biomechanism yokubeletha ngomtsalane wesigxina kufana nokubonwa kunye nokugqwesa. Ngokuqhelekileyo emva kokuhamba kwayo yonke i-amniotic fluid kunye nokuvula okungaphelelanga komlomo wesibeleko, umlenze wokwenza umlomo ungase ufike uze uwele ngaphandle kwesini. Oku kubaluleke kakhulu kwaye kulibala ixesha lokubeleka. Emva kokuba umlomo wesibeleko uvule ngokugcwele, ngokukhawuleza emva kweenyawo kubonakale izikhwebu kunye nokunye oku kukhonjiswe apha ngentla.

Njengoko kunokubonwa, i-biomechanism yokuzalwa kwemvelo ixhomekeka kwisithuba somntwana kunye nommandla wendawo efihliweyo.