Cov txheej txheem:
Video: Koj tshuaj xyuas cov lus teb ntawm cov menyuam yaus li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2024-01-18 09:28
Ua qhov Exam rau Pupillary Responses
- Saib xyuas tus menyuam qhov loj thiab puab thaum so, nrhiav anisocoria (ib tug menyuam kawm ntawv loj dua lwm tus)
- Saib xyuas cov ncaj qha teb (constriction ntawm illuminated tub kawm ntawv)
- Saib xyuas qhov kev pom zoo teb (constriction of cov rov qab tub kawm )
- Rov ua dua nrog rov qab menyuam kawm ntawv.
Tsis tas li ntawd, cov lus teb ntawm cov menyuam kawm ntawv yog dab tsi?
Cov menyuam yaus lub teeb reflex (PLR) los yog photopupillary reflex yog ib qho reflex uas tswj txoj kab uas hla tub kawm , hauv teb mus rau qhov siv zog (luminance) ntawm lub teeb uas ntog rau ntawm lub qhov muag ganglion hlwb ntawm lub retina nyob rau sab nraum qab ntawm lub qhov muag, yog li pab nyob rau hauv adaptation ntawm lub zeem muag mus rau ntau theem ntawm lightness /
Tom qab ntawd, lo lus nug yog, qhov kev ntsuam xyuas ntawm cov tub ntxhais kawm reflex rau dab tsi? Cov lus qhia. Tub ntxhais kawm ntawv teeb reflex yog siv los ntsuas lub hlwb qia ua haujlwm. Qhov txawv txav menyuam yaus teeb reflex tuaj yeem muaj nyob rau hauv optic paj hlwb raug mob, oculomotor paj hlwb puas, lub paj hlwb kab mob, xws li qog, thiab cov tshuaj xws li barbiturates.
Kuj Paub, peb cov lus teb yog dab tsi yog cov tub kawm ntawv ntsuas rau?
Cov menyuam kawm ntawv teb rau peb txawv hom stimuli: lawv constrict nyob rau hauv lus teb rau brightness (the tub kawm teeb lus teb ), constrict in teb mus ze fixation (the tub kawm nyob ze teb ), thiab dilate hauv lus teb kom nce siab hauv kev xav thiab kev xav, txawm tias tshwm sim los ntawm kev txhawb nqa sab nraud lossis spontaneously.
Vim li cas thiaj li tseem ceeb rau kev kawm ntawv?
Cov menyuam tub teeb rov ua dua tso cai rau lub qhov muag los kho tus nqi ntawm lub teeb mus txog retina thiab tiv thaiv cov photoreceptors ntawm lub teeb ci. Lub iris muaj ob pawg ntawm cov leeg du uas tswj qhov loj ntawm qhov tub kawm (Daim duab 7.2).
Pom zoo:
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