He thluaka circle te tak te hi i hria em? (Circle of Willis) Hemi chungchang hi han sawi ila!

‘Circle of Willis’ tih hi i hre ngai em? I doctor-in a hrilh che a ni mai thei, a nih loh leh medical report eng emaw zatah i hmu tawh pawh a ni thei. A nihna takah chuan kan thluak peng pawimawh tak a ni. Security system tlemte ang mai a ni. Chuvangin, he `(Circle of Willis)` hi eng nge a nih leh eng nge a tih tih hi tawi te tein han sawi ila, okay?

‘Circle of Willis’ chu eng nge ni?

Okay, chuti a nih chuan `(Circle of Willis)` chu eng nge ni? A awlsam zawngin kan thluak hnuai chiah, a bul hnaia awm thisen kalna kawng system a ni. Ring ang maia siam a ni a, a nih loh leh a sir panga nei (`(Pentagon)`) . Kan thluaka oxygen tamna, thisen thianghlim pe chhuaktu thisen kalna kawng lian pahnih a awm a. Pakhat chu `(Internal Carotid Artery)` system a ni a, pakhat zawk chu `(Vertebral Artery)` system a ni. Chuvangin he `(Circle of Willis)` hi heng thisen kalna kawng lian pahnih inzawmkhawmna hmun a ni. `(Internal Carotid Artery)` hian thluak hmalam ah thisen a pe ber a, `(Vertebral Artery)` hian thluak hnunglam ah thisen a pe ber bawk.

Hei hi anatomist Thomas Willis hming chawiin ‘ring of Willis’ an ti a. He structure chungchang hi thil tam tak kan hmuhchhuah theihna tura min puitu a ni. Hming dangin an ko bawk a, entirnan:

• ` (Cerebral Arterial Circle)` (Thinlung Arterial Circle) tih a ni.
• ` (Willis Polygon)` (Willis Polygon) tih a ni a, a chhuahna tur hmun hi a lar hle.
• ` (Loop of Willis)` (Willis-a loop) tih a ni.

Hei hi kan thluak tan ‘fail-safe’ ang mai a ni a, himna mechanism a ni. Ngaihtuah teh, heng thisen kalna kawng lian pahnih zinga pakhat hi a chhiat chuan, entirnan, thluaka thisen kalna kawng puak (Brain Aneurysm) emaw, stroke vang emaw a nih chuan, kawng dang chuan hei (Circle of Willis) hmang hian chu thluak hmun chhia chu thisen engemaw zat a pe thei a ni. Chu chu thil mak a ni lo maw?

Mi zawng zawng (Circle of Willis) hi a inang vek em? Nge danglamna a awm em?

Mahse hei hi a ni. Mi zawng zawng hian ``Circle of Willis'' famkim an nei vek lo. Zirchiangtute sawi dan chuan mipui zinga a chanve aia tlem chuan a la awm reng a ni. Chu chu a chhungah hian structural changes tlem a awm thei tihna a ni. Chutiang a nih chuan ``Incomplete Circle of Willis'' kan ti thin.

Thil danglam tam ber pahnih a awm a, a bik takin thisen kalna kawng Anterior Communicating Artery an tih hi Circle of Willis hmalam a awm a ni:

• Fenestration: Hei hian mipui zawng zawng 21% thleng a nghawng thei. Fenestration chu thisen kalna kawng hnih a inthen a, hla vak lo a kal a, a inzawm leh a ni. Kawngpui pahnih a inthen a, a inzawm leh ang mai a ni.
• `(Duplication)` (Duplication) tih hi a ni.Hei hian mi 18% vel a nghawng a ni. ``Duplication`` tih awmzia chu thisen kalna kawng pahnih a hrana intan te chu an inzawm khawm a, thisen kalna kawng pakhat an siam tihna a ni.

Tunah chuan, ‘Ka Circle of Willis pawh hi a kim lo a nih chuan engtin nge ni ang?’ tiin i ngaihtuah mai thei. Lungngai suh. I Circle of Willis hi a kim lo a nih pawhin harsatna awm lovin nun hrisel takin i hmang thei a ni. A tlangpuiin i thluak hnathawh a nghawng vak lo. Mahse, thluak lam natna, stroke ang chi i neih chuan chu famkim lohna rah chu a na deuh mai thei. Hei hi tumruh taka kan thlak danglam theih a ni lo. Hei hi embryonic stage , chu chu nausen pum chhunga kan la awm laiin kan thisen kalna kawng a lo awm dan a\angin a innghat a ni.

Engtiang chiahin nge tling lo (Circle of Willis) hi a awm fo?

Chuti a nih chuan, he `(Circle of Willis)` kim lo hi engtiang chiahin nge a awm? Dik tak chuan zirchiangtute chuan a hluar hle niin an ngai. Mahse engtiang chiahin nge a tlanglawn tih erawh sawi a har khawp mai. A chhan chu, mi zawng zawng hian thluak test `(Scan)` kan nei vek lo. Chutiang `(Scan)` hmang chauh chuan he `(Circle of Willis)` awmzia hi chiang takin a lang thei ang. Zirna hrang hrang atanga a lan dan chuan he `(Circle of Willis)` hi puitling 50% leh 90% inkar ah chuan a tling lo thei a ni . Chumi awmzia chu mi tam zawk chuan danglamna tlemte nen an nei tihna a ni.

Circle of Willis hnathawh hi eng nge ni tak tak?

Tunah hian he `(Circle of Willis)` chanvo hi tlem han sawi leh ila. Kawngpui tam tak inzawmkhawmna `(Traffic Roundabout)` angin han ngaihtuah teh.

`(Circle of Willis)` siamtu artery tin hi kawngpui ang mai a ni. `(Highway)` lian pahnih a awm a, chu chu thisen phur tamna kawngpui pahnih a ni. Chu chu a hmaa kan sawi tawh `(Internal Carotid Artery)` system te, leh `(Vertebral Artery)` system te an ni. `(Circle of Willis)` chhunga kawngpui te tak te dangte chu an inzawm khawm a, chu kawngpui lian pahnih nena inzawm, thisen (i.e. traffic) luang chhuak thei tur roundabout an siam a ni.

Hei hi a thatna chu chu main highway (i.e., thluaka thisen petu thisen kalna kawng lian tak)-ah chuan ‘roadblock’ emaw ‘accident’ emaw a lo awm nghal a nih chuan, highway dang chuan he roundabout kaltlangin thluak natna hmunah thisen engemaw zat a thawn thei a ni. A awlsam zawngin `(Circle of Willis)` kimchang tak neih hian kawng dang (`(Detour Route)`) a awm tihna a ni a, chu chu eng blockage emaw harsatna emaw a awm chuan hman theih a ni.

`(Circle of Willis)` kimchang tak i neih chuan dinhmun khirh tak tak thenkhat lakah a humhim thei che a ni. A bik takin he `(Circle of Willis)`-a thisen kalna kawng tichhe thei natna te hi. Entir nan:

• Thisen kalna kawng chhunga thau awm (Atherosclerosis) .
• Thluak chhunga thisen chhuak (e.g., hliam (Intracranial Hemorrhage)) .
• Carotid Artery Natna / Carotid Artery Stenosis a awm thin
• Thluaka thisen kalna kawng a na (Central Nervous System Vasculitis) .
• Thluaka thisen kalna kawng a chhe (Ruptured Brain Aneurysm) .
• Thai
• Transient Ischemic Attack (TIA) emaw, mini-stroke emaw a ni thei

Mahse, ``Circle of Willis'' tling lo i neih chuan chu circle venhimna hna chu a thawk tha lo. Tichuan, hetiang thluak thisen kalna nena inzawm natnaah hian a nghawng nasat theihna chance a sang deuh a, a bik takin stroke a awm chuan.

He (Circle of Willis) hi khawiah nge a awm?

He `(Circle of Willis)` hi khawiah nge a awm tih chiang takin i hre duh mai thei bawk. `(Base of your Brain)`-ah a awm a, thluak tissue pawn lam deuhah (`(Subarachnoid Space)`) a awm a. Kan `(Pituitary Gland)` hnah vel, `(Hypothalamus)` hnuai chiaha awm a ni. Tin, kan cranial nerve (`(Cranial Nerves)`) engemaw zat chu he `(Circle of Willis)` bulah hian an kal tlang bawk.

Hemi chungchang hi engtikah nge doctor ka zawh ang (Circle of Willis)?

Tunah chuan, 'Engtikah nge he `(Circle of Willis)` chungchang hi ka doctor hnen atangin ka hriat ang?' Awle, chutiang a nih chhan chu eng emaw zat a awm thei a ni:

• Brain aneurysm i neih chuan: The Circle of Willis hi thluaka aneurysm lo awm tamna hmun pakhat a ni. Zirchiangtute chuan intracranial aneurysm 85% vel chu Circle of Willis hmaa thisen kalna hmunah a thleng niin an sawi.
• Stroke i neih chuan: Circle of Willis-a thisen kalna kawngkhar a block emaw, thisen chhuak emaw avanga stroke a awm thei.
• Moyamoya Disease i neih chuan: Hei hi thluak natna hmuh tur awm lo tak a ni. I thluak hmalam panna thisen petu i Circle of Willis-a thisen kalna kawngte chu zawi zawiin a zim emaw, a inkhar emaw hian a thleng thin.
• ‘Subclavian Steal Syndrome’ i neih chuan: Hei hi i ‘Subclavian Artery’ (axillary artery) a zim emaw, a block emaw a nih chuan a thleng thin. Chumi hnuah chuan i thluaka kal tur thisen thenkhat chu i ‘Vertebral Artery’ (‘Circle of Willis’-a thisen kalna kawng lian tak) kaltlangin a ‘ru’ ta a ni.
• I thluak surgery i neih chuan: I thluak hmun he operation i neih lai hian – entirnan, aneurysm emaw, i pituitary gland-a harsatna awm emaw enkawl nan – i Circle of Willis leh a chhehvela thil pawimawh tak takte tihchhiat theihna a tlem hle. Circle of Willis ngei pawh a chhiat chuan thluaka thisen kalna kawng a tikhawlo (Brain Ischemia) emaw, thisen kalna a hloh vek (Infarction) emaw a thlen thei a ni.
• Brain scan i tih chuan:Brain scan, cerebral angiogram emaw brain MRI (Magnetic Resonance Imaging) emaw i neih chuan i report-ah chuan Circle of Willis leh a structure chungchang chipchiar takin a awm thei ang.

(Circle of Willis) chu block a nih chuan eng nge thleng ang?

He `(Circle of Willis)` chhungah hian khawi hmunah pawh blockage a awm a nih chuan eng nge thleng ang tih han ngaihtuah teh. A nihna takah chuan chutiang a nih chuan `(Stroke)` a awm thei. Mahse, ka sawi tawh ang khan `(Circle of Willis)` kimchang tak i neih chuan stroke symptoms na tak lakah eng emaw chen a venghim thei che a ni.

‘Circle of Willis Syndrome’ tih hi eng nge ni?

Doctor leh damdawi lam mi thenkhat chuan a hmaa kan sawi tawh `(Moyamoya Disease)` hi `(Circle of Willis Syndrome)` tiin an sawi bawk. `(Moyamoya Disease)` hming dang chu `(Spontaneous Occlusion of the Circle of Willis)` tih a ni.

He (Circle of Willis) hi hrisel taka awm reng turin eng nge kan tih theih ang?

Chuti a nih chuan, he ``Circle of Willis'' pawimawh tak leh thluaka thisen kalna kawng dangte hi a hrisel theih nan eng nge kan tih theih ang? A pawimawh ber chu cerebrovascular disease i neih chuan i vei theihna tur risk factors te control hi a ni. Heng risk factors te hi:

• Thisen sang lutuk
• Cholesterol sang tak a ni
• Zunthlum natna `(Diabetes Mellitus)`
• Lung Natna
• Chronic Stress a awm
• Thau lutuk
• Meizial zuk / Nicotine hmansualna
• Zu hmansualna (Alcohol Use Disorder) a ni

Heng natnate hi enkawl dan tur chungchangah doctor nen inbiakna neih a pawimawh hle.

I hre reng ang u (Take-Home Message) .

Okay, chuti a nih chuan vawiin a kan sawi tawh atang khan eng takeaways ber nge ni?

``Circle of Willis`` hi kan thluak bul hnaia thisen kalna kawng mak tak, thluak hnena thisen pe chhuaktu system mak tak a ni. Safety net ang mai a ni.

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Mi zawng zawng hian hetiang hi kan nei kim vek lo a, chu chu thil pangngai a ni. A kim lo a nih chuan ngaihtuahawm lutuk tur a awm lo a, mahse thluak natna thenkhatah chuan a hlauhawmna a sang deuh mai thei.

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A pawimawh ber chu kan thluak thisen kalna kawng hrisel taka awmtir thei tur leh stroke ang chi natna laka invenna kawnga nun hi a ni. Chu chu nungchang \ha neih leh a chunga kan sawi tak risk factors te control tihna a ni.

Mi tam tak chuan an `(Circle of Willis)` chungchang pawh an hre ngai lo mai thei. Mahse, thluak natna, `(Aneurysm),` ang chi i neih chuan doctor-in a sawi a ni mai thei.I doctor-in i hriatthiam loh damdawi lam thumal a sawi ngai a nih chuan sawifiahna dil chu hlau ngai suh. I taksa chhunga thil thleng hriat theihna tur dikna i nei vek a ni.

` Ring of Willis, thluak circulation, stroke, cerebral artery ring, thluaka thisen kalna kawng, thluak hriselna, aneurysm