Cov txheej txheem:
- Cov paj hlwb twg yog myelinated los ntawm oligodendrocytes?
- Puas yog lub ntsej muag paj hlwb myelinated?
- Puas yog paj hlwb CNS lossis PNS?
- Puas cranial qab haus huv contralateral?
Video: Puas yog cov hlab ntsha hauv lub hlwb puas yog myelinated?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Txhua lub paj hlwb, tshwj tsis yog optic thiab olfactorycov hlab ntsha, uas suav tias yog qhov ncaj qha nthuav dav ntawm lub hauv nruab nrab paj hlwb, muaj thaj chaw hloov pauv ntawm nruab nrab myelin (los ntawm oligodendrocytes) thiab peripheral myelin (tsim los ntawm Schwann hlwb).
Cov paj hlwb twg yog myelinated los ntawm oligodendrocytes?
Cov paj hlwbyog tib lub paj hlwb uas yuav tsum tau myelinated los ntawm oligodendrocytes. Cov paj hlwb trigeminal yuav yog myelinated los ntawm Schwann hlwb.
Puas yog lub ntsej muag paj hlwb myelinated?
Zoo. Medial REZ ntawm lub ntsej muag paj hlwb yog txhais tau tias 2.6 hli ntev thiab npog los ntawm glial sheath txuas ntxiv los ntawm glial limiting membrane ntawm lub paj hlwb qia. Glial sheath ntawm central myelin nyhav dhau los ua nyias mus rau qhov chaw hloov pauv.
Puas yog paj hlwb CNS lossis PNS?
Cov hlab ntsha hauv lub cev yog xav txog cov khoom ntawm lub paj hlwb peripheral (PNS), txawm hais tias nyob rau theem txheej txheem olfactory, optic thiab cov hlab ntsha hauv nruab nrab tau raug suav tias yog ib feem ntawm lub hauv paus. lub paj hlwb (CNS). 12 khub ntawm cranial qab haus huv yog cov hlab ntsha tshwj xeeb cuam tshuam nrog lub hlwb.
Puas cranial qab haus huv contralateral?
Cov leeg no yog lub luag haujlwm rau sab hauv tig ntawm lub qhov muag. Nws yog tib lub paj hlwb uas tshwm sim los ntawm lub hlwb dorsally thiab tib lub cranial paj uas innervates contralateral lug.
Pom zoo:
Nyob hauv cov hlab ntsha hauv fetus nyob qhov twg cov pa oxygen?
Tsib tsib caug tsib feem pua ntawm cov fetal cardiac tso tawm mus los ntawm cov hlab ntsha umbilical umbilical artery umbilical hlab ntsha yog qhov kawg ntawm cov hlab ntsha sab hauv iliac (anterior faib ntawm). Cov no muab cov ceg qab qab nrog cov ntshav thiab cov as-ham hauv fetus.
Leej twg kos cov roj ntsha hauv cov hlab ntsha?
Yuav Ua Li Cas Kos ABG. Cov Ntshav Ntshav Ntshav yuav tsum tus kws saib xyuas neeg mob txhawm rau sau cov qauv me me ntawm cov ntshav - feem ntau, tag nrho 1 ml³ nyiam dua. Cov ntshav tuaj yeem kos los ntawm cov hlab ntsha ntawm lub dab teg, puab tais, lossis saum lub luj tshib.
Puas yog cov hlab ntsha pinched ua rau mob hauv siab?
Yog tias koj tau hno cov hlab ntsha hauv koj lub caj dab lossis pob txha caj dab, koj yuav hnov mob hauv koj lub hauv siab lossis rov qab. Kev ntxhov siab ntau dhau ntawm cov hlab ntsha tuaj yeem ua rau nws tsis ua haujlwm li nws yuav tsum tau ua.
Cov hlab me me tshaj plaws nyob rau hauv cov hlab ntsha hu ua qhov twg?
Cov hlab ntsha me tshaj plaws, hu ua capillaries, me me heev koj xav tau lub tshuab ntsuas kom pom lawv. Capillaries koom ua cov hlab ntsha loj. Qhov loj dua yog hu ua cov leeg. Cov hlab no nqa ntshav rov qab mus rau lub plawv . Cov hlab ntsha me tshaj plaws lossis cov hlab ntsha hauv cov hlab ntsha yog dab tsi?
Mri ntawm lub hlwb puas pom cov hlab ntsha carotid?
Ntxiv rau kev ntsuas cov hlab ntsha carotid, MRI - tshwj xeeb 3T (lossis 3 Tesla) MRI - tuaj yeem siv los ntsuas kev noj qab haus huv ntawm cov hlab ntsha hauv lub hlwb. Puas yog lub hlwb MRI puas pom cov hlab ntsha txhaws? "MR angiography, siv me me ntawm MRI dye txhaj rau hauv cov leeg ntawm caj npab, tuaj yeem tsim cov duab ntxaws ntxaws ntawm cov hlab ntshamuab lub hlwb thiab tuaj yeem kuaj pom txawm tias qib qis.
