生物谷報(bào)道：最新研究發(fā)現(xiàn),，監(jiān)控人體大腦特殊腦波的改變可以測(cè)定人大腦的精神能量,，該方法是第一個(gè)定量方法。英國(guó)性醫(yī)學(xué)學(xué)會(huì)會(huì)長(zhǎng)Ralph稱此項(xiàng)技術(shù)是“一個(gè)非常有趣的觀點(diǎn),，因?yàn)閺膩頉]有任何測(cè)定人體能量的定量方法,。”Vardi在歐洲性學(xué)會(huì)開展他的研究，現(xiàn)在正準(zhǔn)備用來測(cè)試使用抗抑郁藥物后的病人體能量下降情況,。
在技術(shù)測(cè)定方法中,，除了性欲之外，以色列海法市藍(lán)般醫(yī)院和理工科大學(xué)的Vardi在美國(guó)新科學(xué)家雜志發(fā)表言論說，他們發(fā)現(xiàn)性刺激的能量是最強(qiáng)的,。
到目前為止,，對(duì)30個(gè)具有正常性功能的人進(jìn)行了測(cè)試，如果進(jìn)一步的實(shí)驗(yàn)仍然是成功的,，Vardi希望他的方法可以得到更廣泛的應(yīng)用,。用來定量分析藥物對(duì)人體能量的降低或者加強(qiáng)所產(chǎn)生的副作用。
但是他也警告說,，這種方法是否可能建立為測(cè)定人體能量的絕對(duì)測(cè)量方法仍為時(shí)尚早,，而且仍需要對(duì)性功能障礙的人群進(jìn)行進(jìn)一步的試驗(yàn)來證明此種方法的可行性。
Vardi對(duì)具有正常性功能的14個(gè)男性和16個(gè)女性自愿者進(jìn)行實(shí)驗(yàn),。使用標(biāo)準(zhǔn)的EEG儀器,，一副耳麥和一臺(tái)電腦監(jiān)控，受試者聆聽音樂和其它的聲音來刺激p300腦波,。在音樂或者聲音后對(duì)刺激產(chǎn)生300毫妙的這些正常腦波,。受試者觀看40秒鐘混合了運(yùn)動(dòng)，自然和浪漫的景觀的色情電影剪輯,。研究者記錄p300腦波強(qiáng)度的減少,，并測(cè)定一些受試者在多大程度上受到這些電影剪輯的影響，而色情電影剪輯對(duì)腦波強(qiáng)度的減少是最多的,。
他比較了受試者在看了色情電影剪輯對(duì)他們產(chǎn)生的影響后填寫的問卷調(diào)查,。發(fā)現(xiàn)在他們的描述與p300腦波強(qiáng)度的下降之間有很強(qiáng)的關(guān)聯(lián)，而且男性與女性的比較結(jié)果是相似的,。
對(duì)于p300腦波強(qiáng)度的減少的測(cè)量不是僅限于人體能量的測(cè)定,，而且科學(xué)家已經(jīng)對(duì)此測(cè)定方法使用了許多年。他利用此技術(shù)來測(cè)定人體能量的靈感來自于神經(jīng)學(xué)院的科學(xué)家,，他們用此項(xiàng)技術(shù)來測(cè)定人們?cè)谲嚨溸^程中人注意力的集中程度,。此種方法研究的難點(diǎn)在于尋找一種標(biāo)準(zhǔn)方法來測(cè)量一個(gè)特殊的色情電影對(duì)觀看者產(chǎn)生怎樣的刺激。為了得到一個(gè)標(biāo)準(zhǔn)化的色情電影剪輯是存在很大的問題的,。Vardi說他在意大利測(cè)試25個(gè)男性和女性使用的電影剪輯是他曾經(jīng)使用的最能產(chǎn)生刺激作用的電影剪輯（http://www.bioon.com/）,。
Watching brain waves could quantify libido
Monitoring the change in specific brain waves could be the first quantitative method for measuring libido, new research suggests.
The technique measures attention, rather than sexual desire specifically, but Yoram Vardi, at Rambam Hospital and the Technion, both in Haifa, Israel told NewScientist: "We found that sexual stimuli are the most potent."
So far 30 people with normal sexual function have been tested, but if further tests are successful, Vardi hopes his method will have many applications. These could include quantitatively analysing the libido-lowering (or enhancing) side effects of medication or even supporting legal claims of a reduction in sex drive after an accident.
But he cautions that it is too early to say for sure whether it will be possible to establish an absolute measurement scale for libido.
David Ralph, chairman of the British Society for Sexual Medicine, says the technique is "an interesting concept and the first of its kind - there has never been any quantitative measurement of libido".
He told New Scientist further tests are needed involving people with sexual dysfunction to indicate the potential of the approach, but adds that "another tool to help diagnose patients is always helpful".
Random clips
Vardi conducted experiments on 14 male and 16 female volunteers with normal sexual function. Using standard EEG equipment, a pair of headphones and a computer monitor, the subjects listened to music and other sounds to stimulate p300 brain waves. These waves, produced 300 milliseconds after an event, are the brain's normal response to stimuli.
The subjects were then shown a random selection of 40-second film clips, which mixed erotic clips in amongst footage of sports, nature and romantic vistas. The reduction in amplitude of the p300 waves was recorded and provides a measure of how much someone was distracted by a clip.
The reduction in amplitude was significantly greater for the sexual clips than for the others. Vardi then compared the results with questionnaires the subjects filled in afterwards about how much each erotic clip had aroused them. He found a strong correlation between their description and the drop in p300 amplitude, and the results were similar for men and women.
Standard stimulation
Vardi acknowledges that the measurement of p300 reduction is not specific to libido and has been used by researchers for other purposes for many years. He was inspired to use it in a sexual context by a neurologist colleague who was using the technique to measure the attention capabilities of people involved in car accidents.
Vardi, who presented his research at the recent European Society for Sexual Medicine Congress, is now preparing to test patients whose libido has been lowered by prescribed drugs, such as antidepressants.
One of the challenges, he says, is to find a standard measure of how stimulating a particular piece of erotic footage is to viewers. "To have a standardised sexual clip is very problematic," Vardi said. The footage he used had been tested in Italy by 25 men and women. "Only the clips that were the most arousing were used," he says.
