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Ilmu Alam => Biologi => Topik dimulai oleh: ksatriabajuhitam pada September 08, 2011, 09:49:51 AM

Judul: Medan magnet menghambat kemampuan berbohong
Ditulis oleh: ksatriabajuhitam pada September 08, 2011, 09:49:51 AM
beneran, ya?
menarik kalo iya

Kutip
Powerful magnets hamper our ability to lie

06 September 2011
Magazine issue 2828. Subscribe and save
For similar stories, visit the The Human Brain Topic Guide

YOU will tell the truth. Applying a magnetic field to the brain seems to hamper our ability to tell lies.

Lying is thought to involve inhibiting our normal propensity to truth-telling, so Talis Bachmann's team at the University of Tartu in Estonia reasoned that dampening brain activity in the dorsolateral prefrontal cortex (DLPFC) - which is involved in cognitive control - might alter the likelihood of lying.

The researchers asked 16 volunteers to name the colour of a disc on a computer screen after receiving transcranial magnetic stimulation (TMS) to dampen activity in their DLPFC. They were given the option to lie or answer honestly. The task was then repeated following TMS of the parietal cortex - a part of the brain unassociated with cognitive control. The volunteers gave significantly fewer truthful answers after TMS of the left DLPFC - but suppressing the right DLPFC increased the number of true responses (Behavioural Brain Research, DOI: 10.1016/j.bbr.2011.07.028).

"DLPFC seems to be involved in deception, but its exact role remains unclear," says Bruno Verschuere at the University of Amsterdam in the Netherlands. He says it is difficult to draw firm conclusions from a small sample.

Source: http://www.newscientist.com/article/mg21128284.400-powerful-magnets-hamper-our-ability-to-lie.html?DCMP=OTC-rss&nsref=online-news

tentang TMS:
Kutip
Transcranial magnetic stimulation (TMS) is a noninvasive method to cause depolarization or hyperpolarization in the neurons of the brain. TMS uses electromagnetic induction to induce weak electric currents using a rapidly changing magnetic field; this can cause activity in specific or general parts of the brain with minimal discomfort, allowing the functioning and interconnections of the brain to be studied. A variant of TMS, repetitive transcranial magnetic stimulation (rTMS), has been tested as a treatment tool depression and auditory hallucinations.

http://en.wikipedia.org/wiki/Transcranial_magnetic_stimulation
Judul: Re: Medan magnet menghambat kemampuan berbohong
Ditulis oleh: Farabi pada September 08, 2011, 11:33:24 AM
Berbohong ada kaitannya dengan sirkuit reward di otak manusia. Sirkuit ini yang mengatur pelepasan dophamin di tubuh manusia. Lagipula pada dasarnya manusia itu tahu bahwa merugikan orang lain itu adalah hal jelek. Itu sebabnya pelepasan dophamin di otak orang yang berbohong lebih sedikit dibandingkan dengan orang yang jujur, karena tubuh manusia tidak didesain untuk berbohong ataupun merugikan orang lain. Keliatan kan orang yang bohong kayak gimana? Tapi memang dengan banyak latihan seseorang yang berbohong bisa tampak seperti orang jujur, tapi tetap saja stress. ;D
Judul: Re: Medan magnet menghambat kemampuan berbohong
Ditulis oleh: syx pada September 08, 2011, 11:41:21 PM
jangan-jangan bukan menghambat kemampuan berbohong tapi juga kemampuan untuk berpikir. untuk berbohong kan kita perlu berpikir juga. nah kalo kemampuan berpikir terhambat akibat lebih jauhnya ...