![Dab tsi yog qhov projection fibre? Dab tsi yog qhov projection fibre?](https://i.answers-medical.com/preview/medical-health/14183529-what-are-projection-fibres-j.webp)
Video: Dab tsi yog qhov projection fibre?
![Video: Dab tsi yog qhov projection fibre? Video: Dab tsi yog qhov projection fibre?](https://i.ytimg.com/vi/QUttcT9BnbM/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Projection fibers muaj ob qho tib si afferent thiab efferent paj hlwb fibers uas ob peb lub paj hlwb nrog tus txha nqaj qaum. Cov no qhov projection fibers yog cov hlab ntsha myelinated uas tau teeb tsa hauv kab hauv cov teeb meem dawb nyob ib puag ncig cov teeb meem grey. Dorsal kem xa cov ntaub ntawv somatic rau lub hlwb.
Los ntawm qhov ntawd, cov phiaj xwm phiaj xwm yog dab tsi?
Cov phiaj xwm phiaj xwm txuas vertically ntawm qhov siab dua thiab qis dua ntawm lub hlwb thiab cov chaw qaum qaum, thiab nqa cov ntaub ntawv ntawm cerebrum thiab lub cev tag nrho. Lwm yam projection daim ntawv nqa cov cim taw qhia mus rau lub paj hlwb.
Qhov thib ob, qhov projection fibers nyob qhov twg? Projection Fibers Cov no fibers txuas lub paj hlwb cortex nrog qis dua ntawm lub hlwb lossis lub paj hlwb thiab tus txha caj qaum, hauv ob qho kev qhia. Corticofugal (ua haujlwm zoo) fibers tawm los ntawm lub paj hlwb cortex mus rau thalamus, lub hlwb qia, lossis qaum qaum.
Hauv txoj kev no, kev koom nrog cov fibre yog dab tsi?
Kev sib koom tes fibers yog axons uas txuas rau thaj chaw cortical hauv tib lub paj hlwb. Hauv tib neeg neuroanatomy, axons (paj hlwb fibers ) hauv lub hlwb, tuaj yeem raug cais raws qhov lawv kawm thiab kev sib txuas zoo li kev sib koom tes fibers , qhov projection fibers , thiab commissural fibers.
Commissural fibers ua dab tsi?
Cov commissural fibers los yog transverse fibre yog axons uas txuas ob hemispheres ntawm lub hlwb. Nyob rau hauv sib piv rau commissural fibers , koom haum fibers txuas cov cheeb tsam hauv tib lub hemisphere ntawm lub hlwb, thiab kev kwv yees fibers txuas txhua cheeb tsam mus rau lwm qhov chaw ntawm lub hlwb lossis rau tus txha caj qaum.
Pom zoo:
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Kev nkag siab tsis tu ncua, tseem hu ua qhov tsis sib xws, lossis qhov tshwm sim tsis tu ncua, kev nyiam tsiaj thiab tib neeg kom pom cov khoom paub zoo li muaj tus qauv zoo, qhov loj me, xim, lossis qhov chaw tsis hais txog kev hloov pauv ntawm lub kaum sab xis ntawm kev xav, nrug deb, lossis teeb pom kev zoo
Qhov projection imaging yog dab tsi?
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X-ray duab yog txheej txheem kev kwv yees, thiab tsim cov duab yuav siv qhov chaw ib txwm muaj ntawm cov duab thaij duab, txawm hais tias kev siv duab X-ray ncaj qha tau dhau los ntau dua. Hauv nws daim ntawv feem ntau, X-ray duab yog qhov ua tau zoo
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Tus txheej txheem hais txog kev kwv yees kwv yees loj lossis ua rau muaj kev sib tsoo, ib yam li kev cog lus xws li kev cog qoob loo. Ob leeg tubercle thiab tuberosity xa mus rau qhov projection lossis tsoo nrog qhov roughened nto, nrog 'tubercle' feem ntau me dua li 'tuberosity'
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Zoo li feem ntau qhov kev kho mob ib txwm muaj txiaj ntsig thiab ntau yam, lub ntsiab lus tuaj yeem sib txawv me ntsis, tab sis feem ntau cov ntsiab lus hauv qab no siv: Ua rau me me hypoxemia: PaO2 = 60 txog 79 mmHg. Qhov nruab nrab hypoxemia: PaO2 = 40 txog 59 mmHg. Hypoxemia hnyav: PaO2 <40 mmHg
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Qhov pib tsis txaus yog qhov tsawg kawg ntawm kev txhawb siab xav tau rau ib tus neeg kom pom qhov kev txhawb siab 50 feem pua ntawm lub sijhawm. Qhov sib txawv ntawm qhov sib txawv yog qhov sib txawv me tshaj hauv kev txhawb nqa uas tuaj yeem kuaj pom 50 feem pua ntawm lub sijhawm