Qhov sib txawv tseem ceeb ntawm amacrine thiab kab rov tav yog tias cov hlwb amacrine tau txais cov ntaub ntawv los ntawm cov hlwb bipolar thaum cov hlwb kab rov tav tau txais cov ntaub ntawv los ntawm photoreceptors.
Photoreceptors, hlwb bipolar, hlwb ganglion, kab rov tav hlwb thiab amacrine hlwb yog tsib hom neurons pom hauv peb lub retina. Tag nrho cov neurons no pab txhawb kev ua cov ntaub ntawv pom hauv retina. Photoreceptors, hlwb bipolar thiab ganglion hlwb koom nrog txoj hauv kev ncaj qha tshaj plaws rau kev xa cov ntaub ntawv pom rau lub hlwb. Kab rov tav hlwb thiab amacrine hlwb kho cov kev sib cuam tshuam ntawm sab hauv thiab sab hauv plexiform txheej, feem. Kab rov tav hlwb tau txais cov ntaub ntawv los ntawm photoreceptors thaum lub hlwb amacrine tau txais lawv cov tswv yim los ntawm cov hlwb bipolar.
Amacrine Cells yog dab tsi?
Amacrine hlwb yog ib hom interneuron hauv retina koom nrog hauv retina txoj kev tsis ncaj ncees. Lawv lub cev ntawm tes yog nyob rau hauv cov txheej txheem nuclear sab hauv. Lawv ua haujlwm ntawm txheej txheej plexiform. Amacrine hlwb tau txais cov khoom siv los ntawm cov hlwb bipolar, thiab tom qab ntawd txuas cov hlwb bipolar rau cov hlwb ganglion. Yog li, amacrine hlwb yog postsynaptic rau bipolar cell terminals thiab presynaptic rau dendrites ntawm ganglion hlwb. Muaj 30 mus rau 40 hom sub-hom amacrine hlwb. Zoo ib yam li cov kab rov tav, cov hlwb amacrine ua haujlwm tom qab. Txawm li cas los xij, tsis zoo li cov hlwb kab rov tav, cov hlwb amacrine tau tshwj xeeb dua. Lawv tso cov neurotransmitters.
Daim duab 01: Amacrine Cells
Kab rov tav Cells yog dab tsi?
Kab rov tav hlwb yog hom interneurons nyob rau hauv retina uas ua haujlwm tom qab zoo ib yam li amacrine hlwb. Lawv lub cev ntawm tes kuj tseem nyob hauv cov txheej txheem nuclear sab hauv thiab lawv ua haujlwm ntawm txheej txheej plexiform. Kab rov tav hlwb tau txais kev nkag los ntawm ntau lub photoreceptors. Kab rov tav hlwb depolarize los ntawm kev tso tawm glutamate los ntawm photoreceptors.
Daim duab 02: Kab rov tav Cells
Kab rov tav cov hlwb feem ntau hloov kho cov ntaub ntawv los ntawm photoreceptors rau cov hlwb bipolar hauv txheej txheej plexiform. Muaj ib lossis ob chav kawm ntawm kab rov tav.
Dab tsi zoo sib xws ntawm Amacrine thiab Kab rov tav Cells?
- Amacrine thiab kab rov tav hlwb yog ob hom hlwb uas pab txhawb kev ua cov ntaub ntawv pom hauv retina.
- Structurally, lawv yog retinal neurons.
- Lawv yog interneurons.
- Lawv ua haujlwm tom qab.
- Lawv muaj lawv lub cev ntawm tes hauv cov txheej txheem nuclear sab hauv ntawm retina.
- Ntxiv mus, lawv yog inhibitory neurons.
Qhov txawv ntawm Amacrine thiab Kab rov tav Cells yog dab tsi?
Qhov sib txawv tseem ceeb ntawm amacrine thiab kab rov tav hlwb yog tias cov hlwb amacrine yog ib hom retinal interneurons uas hloov cov ntaub ntawv los ntawm cov hlwb bipolar mus rau cov hlwb hlwb hauv lub hlwb plexiform. Kab rov tav hlwb, ntawm qhov tod tes, yog ib hom retinal interneurons uas hloov cov ntaub ntawv ntws los ntawm photoreceptors mus rau cov hlwb bipolar hauv txheej txheej plexiform. Tsis tas li ntawd, amacrine yog lub luag haujlwm rau kev muab txoj hauv kev los ntawm kev sib txuas ntawm cov hlwb bipolar nrog cov hlwb ganglion, thaum cov hlwb kab rov tav, ntawm qhov tod tes, yog lub luag haujlwm rau qhov pom qhov system qhov rhiab heev rau qhov sib txawv ntawm qhov sib txawv ntawm ntau yam ntawm lub teeb siv.
Hauv qab infographic qhia ntau cov ntsiab lus ntawm qhov sib txawv ntawm amacrine thiab kab rov tav.
Summary – Amacrine vs Kab rov tav Cells
Amacrine hlwb thiab kab rov tav hlwb yog ob hom interneurons nyob rau hauv lub retina uas yog lub luag hauj lwm rau lateral kev sib tshuam nyob rau hauv lub retina. Cov hlwb Amacrine tau txais cov khoom siv los ntawm cov hlwb bipolar thaum cov hlwb kab rov tav tau txais cov khoom siv los ntawm photoreceptors. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm amacrine thiab kab rov tav hlwb. Amacrine hlwb ua haujlwm ntawm lub puab plexiform txheej nyob rau hauv lub retina thaum kab rov tav hlwb ua haujlwm ntawm txheej plexiform txheej. Ob leeg pom muaj nyob rau hauv cov txheej txheem nuclear sab hauv ntawm retina thiab lawv koom nrog kev sib txuas sab nraud lossis retina txoj kev tsis ncaj ncees.
