I mit hmuhna leh i thluak inzawmna enfiahtu VEP test (Visual Evoked Potential Test) chungchang i zir chiang ang u.

Doctor pakhatin, `(VEP)` test kan ti ang em ?' Chutianga a sawi chuan zawhna tenau tak a rawn lang a, ‘He `(VEP)` hi eng nge ni?’ tih hi a ni lo maw? Vawiin hian visual evoked potential test an tih emaw, kan hriat vek angin `(Visual Evoked Potential)` emaw `(VEP)` test emaw kan sawi dawn a ni. Hei hi a takah chuan test bik a ni a, chu chuan i thluak hnathawh dan, mit hmuhna nena inzawm a enfiah thin. Hlau suh, hei hi i ngaihtuah angin thil lian tak a ni lo.

He VEP test hian eng chiah nge a zawn?

Okay, tunah chuan he `(VEP)` test hian eng nge a tih tak tak tih kan en ang . A awlsam zawngin, thil i en hian i thluaka visual cortex-in chu visual stimulus a chhan dan a teh a, i.e. electrical signal a pe chhuak em tih leh a tih rang dan a teh a ni. Hei hi `(Visual Evoked Response)` emaw `(VER)` emaw an ti bawk.

I mit chu camera ang maiin ngaihtuah rawh. Chu camera hmanga thlalak i lak hian chu thlalak atanga information chu i thluak ah i transfer a ngai a ni lawm ni? Chu thuchah kengtu kawng chu `Visual Pathway` an ti a. `(VEP)` hian he kawng hi a thawk tha em tih a enfiah ber a ni. He hmuh theihna kawng hian:

• I mit (`Mit`) .
• Optic Nerves - Hengte hi mit atanga thluak thlenga thuchah phur thei cable ang a ni. Anni hi a pawimawh em em a ni.
• Optic Chiasm - Hei hi i thluak chhunga hmun mak tak a ni. Hei hi mit pakhat atanga optic nerve fiber thenkhat chu mit dang atanga nerve fiber te nen an inzawm khawmna hmun a ni.
• Optic Tract - Retina atanga thluak thlenga thuchah thawn chhuahna kawng.
• Optic Radiation - Hei hi i retina, optic nerve, leh optic disc atanga hmuh theih information te thluaka a thawn chhuah dan a ni.
• Cerebral Cortex - Thluak a information processing leh hriatthiamna hmunpui ber .

Chuvangin, i thluak mit hmuhna kawng emaw, hmuh theihna cortex emaw-ah thil danglam emaw, harsatna emaw a awm a nih chuan `(VEP)` test result atang hian kan hre thei ang.

VEP test hmang hian eng natna nge hriat theih?

Tunah chuan, ‘Awle, hei hi mit hmuhna nena inzawm thil en chungchang a ni a, chuti a nih chuan eng ang natna nge a hriatchhuah theih ang?’ tiin i ngaihtuah mai thei. Dik tak chuan `(VEP)` test hi damdawi lam dinhmun thenkhat hriatchhuahna atana hman a ni fo thin.A nih loh leh chu lam hawia kawhhmuh tur hint angin.

Doctor-te’n he test hi an tih chhan ber chu Multiple Sclerosis (MS) tih natna nei tan a ni. MS vei tam tak chuan Optic Neuritis an tih natna an nei thei a. Hei hi he test hi a pawimawh em em lai a ni.

Chu mai pawh ni lovin, hei hian dinhmun dang tam tak hriatchhuahna kawngah a pui a ni:

• I mit nerve-a tumor lo awm, glioma . Hei hi Neurofibromatosis type 1 tih natna nen a inzawm tlangpui.
• Entirnan, hydrocephalus emaw, pituitary adenoma emaw avanga i mit kawng tihkhawtlai .
• Lu emaw thluak emaw hliam avanga mit hmuhna kawng chhiatna .
• Toxic Optic Neuropathy, damdawi thenkhat emaw, thil tha lo tak tak carbon monoxide ang chi emaw avanga lo awm thei .
• Mit lam natna chi dang, entirnan , Anterior Ischemic Optic Neuropathy .
• Infection avanga mit hmuhna lama harsatna awm. Entîr nân, meningeal tuberculosis .

He test hian neurodegenerative condition hriat tawh thenkhatte zau zawng a zirchiang thei bawk . Entirna thenkhat chu:

• Multiple Sclerosis ( MS ) natna a ni.
• Leber mit lam natna (LON) a ni.
• Kjer-type Dominant Optic Neuritis (DON) a awm a, a chhuahna tur hmun leh a hmanna tur a awm lo.
• Friedrich-a Ataxia tih hi a ni

He VEP test hian engtin nge hna a thawh?

Okay, tunah chuan he `(VEP)` test hi engtin tak nge tih a nih tih kan en ang a, eng nge thleng tih kan en ang . Hei hi i ngaihtuah angin a lian lo va, hlauhawm tak a ni lo va, thil awlsam tak a ni.

I lu, a nih loh leh i luruh hmun bik ah electrode te te tlemte an dah a. Hengte hi sticker te te ang mai a ni. Tichuan, visual stimulus an entir che a ni. Vawi tam tak chu hei hi checkerboard pattern flashing tak a ni .

I lu vunah electrode inbun hian electrical signal (message) a siam a, chu chu i thluak cell inkarah a kal a ni.A tehna. Chu chessboard pattern chu a eng chuan i visual cortex chuan a chhang let a, chu thu chu awmzia nei turin a bei thin. Chutih lai tak chuan i thluaka electrical activity chu chu electrode te chuan an record ta a ni. Doctor-te chuan he ``(VEP)`` test hi ``Electroencephalogram`` (``EEG``) nen inzawmin an ti thin. Chu chu i thluak electrical activity pangngai pawh an en tihna a ni.

He `(VEP)` machine hian a tih chu chu visual stimulus chu vawi tam tak a entir che a, a vawi khatnaah `(EEG)` atanga signal lo chhuakte average value a la thin. Chutah chuan i mit hmuhna kawng (visual pathway) hnathawh dan dik takin i teh thei ang. He machine hian i thluak atanga electrical response lo chhuak chu channel engemaw zat, a nih loh leh `traces` hmangin a record thin. I hria em, i thluak (visual cortex) ah hian `waveform` bik a awm a, chu chu visual stimulus chhanna atan hun bik takah a thleng thin.

Chumi hnuah chuan specialist chuan heng wave pattern-te hi thil danglam tak a awm leh awm loh a enfiah a, chu chuan i mit hmuhna kawngah eng ang harsatna nge awm thei tih a hriatthiam theih nan a pui thei a ni.

Test hmain engtin nge i inbuatsaih ang?

He `(VEP)` test atana inbuatsaih lutuk tur hian tih ngai a awm tak tak lo. Mahse, ngaihtuah tur tlemte a awm.

I doctor chuan test chungchanga i hriat tur zawng zawng leh test hmaa i tih tur zawng zawng a hrilh ang che. Zawhna emaw, ngaihtuahna emaw i neih chuan zawt ngei ang che . A pawimawh ber chu an sawi anga inbuatsaih hi a ni.

Test hma ni khatah, a nih loh leh test zing lamah i sam i tihfai a ngai a ni . Shower la la, i sam i sil thei a nih chuan a tha ber. I sam ah hian hair spray, oil, gel engmah dah suh. A chhan chu, chutiang thil chu i neih chuan i lu-a electrode inbun te chu a thawk tha thei lo thei a ni. Chu chu i tih tur tak tak chu a ni. A awlsam hle mai, a ni lawm ni?

Test neih chhung hian eng nge thleng?

`(VEP)` test chi hrang hrang a awm avangin an tih dan pawh a inang lo deuh thei. Mahse hetiang hian a kal tlangpui:

• Medical staff member chuan i luruh hmun bikteah electrode engemaw zat, thir plate te tak te ang maia lang chu a dah ang . Chungte chu awlsam taka lakchhuah theih tur adhesive chi khat bik hmanga inzawm a ni. Heng electrode te hi machine nen an inzawm a ni. Machine hi doctor hnenah i thluak hnathawh dan tur information pe tu a ni.
• Tichuan, mit pakhat chu patch hmanga khuh tur leh mit dang hmanga monitor en turin an ti ang che. Monitor chuan flashing visual stimulus (a tlangpuiin checkerboard pattern) chu a rawn tarlang ang. Mit pakhat i test zawh chuan mit dang pawh chutiang bawk chuan test a ni ang.

Hetiang i tih lai hian hrehawm i nei lovang . Hun engemaw chen chu dinhmun inangah i awm reng a ngaih avangin tlem chuan i lungawi lo deuh mai thei. Mahse, ngaihtuahawm tur a awm lo. I rilru a hahdam thei.

Test hi eng chen nge a ngaih?

He test pumpui hi minute 60 vel, a nih loh leh darkar khat vel a ni thei. A châng chuan chu aia tlem emaw, a aia tam emaw pawh a ni thei. Chuvângin, chutiang atân chuan inbuatsaih la, hun engemaw chen chu ruat rawh.

Test result hian eng nge a sawi?

`(VEP)` test an tih zawh veleh specialist-in uluk takin result a zirchiang ang. Tichuan `report` a siam ang a, i doctor hnenah a thawn ang. Chumi hnuah chauh chuan i doctor chuan a result chu a hrilhfiah ang che.

He `(VEP)` test hian i mit hmuhna hmuna harsatna hrang hrang engemaw zat a hmuchhuak thei a ni . Buaina a zirin waveforms pianzia leh stimulus pek a nih atanga thluak chhanna hun a duh dan a inang lo ang. Entirnan, mit nerve (`(MS)` ang chi) myelin sheath tichhe thei `demyelinating conditions` ah chuan `(VEP)` test hian i thluak hian a chhanna a tlai tih a tarlang ang. Chumi awmzia chu thuchah chu a thlen theih nan hun a duh rei zawk tihna a ni.

He test result-ah hian thil engemaw a lang a nih pawhin, i doctor chuan test tam zawk tihsak turin a ti thei che tih hre reng ang che. Chuvangin hlauthawng nghal suh. Doctor nen inbia la, engkim hrilhfiah rawh.

I doctor chuan a result chu chipchiar takin a hrilhfiah ang che. Test dang neih belh a ngai a nih chuan an hrilh bawk ang che. Tin, i tih leh tur chungchangah pawh kaihhruaina an pe bawk ang che.

A tawp berah chuan hei hi ka hrilh a ngai a ni.

Visual Evoked Potential (VEP) test hi test awlsam tak, non-invasive test a ni a, i mit leh thluak hian visual stimuli process dan tichhe thei dinhmun thenkhat hriatchhuahna kawngah a pui thei a ni. Test neih chhung hian natna engmah i hre lovang.

I doctor chuan test hma leh test zawhah engkim a hrilhfiah vek ang che. Zawhna emaw, ngaihtuahna emaw i neih chuan zawh hlau suh . I medical team te chu i tanpui turin an awm reng a ni. Chuvangin, i doctor-in hetiang test hi ti turin a hrilh che a nih chuan a tul lovah hlau suh, okay? Hei hi i hriselna chungchanga thu pawimawh tak tak i hriat theih nan chauh a ni.

` Visual evoked potential test, VEP test, mit hmuhna, thluak hnathawh dan, mit hmuhna kawng, thluak lam natna, Multiple Sclerosis (MS)