13 August 2011

Circadian Rhythm, Biological Clock dan Sleep-Wake cycle.

Salam alaik.

Badek akan pulang ke Malaysia untuk cuti musim panas dengan menaiki pesawat pada jam 1.30 petang waktu Egypt. Dijangka Badek akan sampai pada jam 9.40 pagi waktu Malaysia keesokan harinya. Beza jam antara Egypt dan Malaysia adalah lewat 6 jam. Bayangkan sewaktu Badek tiba di KLIA, sepatutnya jam 3.40 pagi di Egypt, Badek sepatutnya masih lena diulit mimpi bersama Cleopatra, malangnya Badek bakal menghadapi waktu siang yang lebih panjang, *bermakna penerimaan cahaya matahari yang lebih lama*.

Kesimpulannya demi adjust balik badan Badek dengan kondisi dan perbezaan waktu di Malaysia (Badek will suffer from JETLAG), Badek mungkin akan tidur sehari dua dan kembali beraktiviti seperti biasa, mengikut jam Malaysia. Biological clock tubuh Badek sudah terganggu. Sudah tiga tahun lamanya Badek tinggal di Egypt, mampukah Badek perbetulkan biological clock tubuhnya? Jawapannya, Badek mesti boleh!


Jadual Circadian-biological clock seorang manusia.

Biological clock adalah sebuah mekanisma dalam badan yang akan mengawal segala aktiviti atau fungsi dalam badan secara berjadual. Seperti contoh ritma tidur, kadar metabolisma dan juga fotosintesis. Semua makhluk tuhan tidak terhad pada manusia sahaja mempunyai biological mereka sendiri. BC dizahirkan dalam bentuk grouping cell.

Ada seorang hamba Allah ni masa aku di zaman asrama dulu tiap kali pukul 3 pagi mesti gerak aku temankan beliau pergi toilet, buang air kecil. Mak beliau syak yang beliau kena buatan jin. Sejak aku pujuk beliau ke toilet sebelum tidur dalam jam 11 malam, beliau tidak lagi rasa nak buang air kecil jam 3 pagi. BC beliau sudah di-alter supaya mengikut habit dan kawalan yang baharu. Bukan sebab jin mahupon penunggu toilet. Jadi sama kes seperti Badek yang jetlag. Badek hanya perlu aturkan semula jadual tidurnya sebaik sahaja sampai di Malaysia nanti.

Circadian Rhythm ("circadian" datang dari ayat latin bermaksud "around", dan diem atau dies, bermaksud "day") pula berkait rapat dengan Biological Clock (BC). BC akan mendorong satu proses baru bernama Circadian Rhythm. Master clock dalam otak pula akan mengawal Circadian Rhythm ini. Suprachiasmatic nucleus (SCN atau master clock), kumpulan nerve cell yang terletak di hypothalamus (bahagian otak berdekatan dgn saraf mata). Circadian Rhythm mengawal sleep-wake cycles, pengeluaran hormon, suhu badan dan lain lain fungsi badan.


Bagaimana Circadian rhythm mempengaruhi tidur anda?
SCN akan mengawal pengeluaran hormon tidur, melatonin. Lokasinya yang terletak berdekatan dengan mata, SCN akan menerima infomasi tentang kehadiran cahaya. Jika penerimaan cahaya banyak (siang) lantas pengeluaran melatonin akan berkurangan, lantas membuat anda terjaga dan tak mahu tidur. Dan jika penerimaan cahaya sedikit (malam) pengeluaran melatonin banyak, anda akan rasa mengantuk..

Bila pagi menjelma paras melatonin akan jatuh kembali, badan akan lebih rasa segar dan anda tidak lagi rasa mengantuk. Di sini suhu badan memainkan peranan, bila suhu badan naik, paras melatonin turun juga vice versa. Jadi tidak hairanlah kalau waktu musim sejuk, walaupon matahari mencanak atas kepala tapi suhu badan masih sejuk anda tetap rasa mengantuk.

Apa terjadi bila Circadian Rhythm ini terganggu di sebabkan oleh kerja malam atau pon jegil mata tengok wrestling? Insomnia akan berlaku. Bila payah nak tidur, sistem organ dalam tubuh turut akan terganggu.

Video Rhythm and Snooze -- Circadian Genes (link) akan menjawab macam mana manusia boleh kaji Circadian Rhythm dan boleh terangkan hal ni lebih mendalam. Interesting tho. Boleh berkongsi dengan students or makwe sebelah rumah. Oh ya sebelum terlupa, bulan Ramadhan ni amalkan gaya hidup yang sihat. Peace.

Saja-saja nak tanya:  Bagaimana orang yang tinggal di Alaska misalnya yang mengahadapi almost 24 hour of sunlight mengawal jadual tidur mereka? CR mereka terganggu tak? Share pandangan kamu ya.




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26 komen:

BadekGonzalez said...

orang Alaska rasanya, BC diorang dah tak depend pada matahari. diorang mungkin dah ikut 'jam' yang sedia ada dalam badan memasing. contohnya, pasti korang penah perasan dalam discovery pasal satu mat saleh ni, yang die boleh set dia untuk bangun pukul berapa. eksperimen dijalankan dengan mempermainkan pembolehubah dimanipulasikan dan pemboleh ubah dimalarkan(turut diubah), dia tetap boleh bangun pada masa yang disuruh. pemboleh ubah yang dimanipulasikan adalah jam yang diberikan diberi masa tipu(cth:lewat sejam), namun tetap bangun pada jam yang disuruh(pada waktu sebenar dan bukan berpandu pada jam tipu)...

hee.thanks sebab reply request.
semoga cepat sahur.

Jαnnαhツ said...

hm, apa pulak pandangan anda tentang sleep walking/ sleep talking? coz i experience that quite often...

Fiq Vertigo said...

wah Jannah thanks yo... nanti kita tgk mcm mn ye.


badek. yes! badek got it right. itulah efek BC... :) they not depend on environmental cues anymore.

LaL™ said...

bleh x trangkan pasal "delayed sleep phase syndrome" .macam mane nak ubati pnyakit nie. saye rase saye dah mghidapi nyer.

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