推薦: 檢驗設(shè)備 | 影像設(shè)備 | 手術(shù)/急救設(shè)備 | 超聲設(shè)備 | 電子儀器 | 激光儀器 | 治療康復(fù)設(shè)備 | 病房護(hù)理設(shè)備 | 醫(yī)用光學(xué) | 冷療/冷藏設(shè)備 | 實驗室設(shè)備 | 幻燈課件 | 臨床用藥 |
首頁 > 美迪醫(yī)訊 > 病人焦慮的產(chǎn)生與大腦的解剖結(jié)構(gòu)不同有關(guān) |
病人焦慮的產(chǎn)生與大腦的解剖結(jié)構(gòu)不同有關(guān) 【?2007-06-06 發(fā)布?】 美迪醫(yī)訊
最近一項關(guān)于影像方面的研究揭示了大腦一小區(qū)域解剖結(jié)構(gòu)的不同可以解釋為什么同樣的刺激對某些個體來說能刺激焦慮而對另 一些人來說不能。 按照西班牙兩所大學(xué)以及Eresa公司聯(lián)合完成的一項研究報告,人腦的激發(fā)可根據(jù)某些機(jī)制發(fā)生,使得某些人比另一些人在同等 情況下更容易焦慮?;加薪箲]的病人,臉上可因特殊的刺激表現(xiàn)出不合適的表情。這項研究發(fā)表在神經(jīng)影像期刊2007年6月號。 這些患有焦慮癥的病人可由于害怕表現(xiàn)出比正常人更加的焦躁不安或不能處理他們認(rèn)為重要的事。因此,這些病人不能再緊張的 條件下做出正確的反應(yīng)。隨后會導(dǎo)致行為波動,一些相關(guān)的壓抑癥狀便出現(xiàn)了。 焦慮產(chǎn)生的過程中對沒有成就感或甚至是懲罰產(chǎn)生不恰當(dāng)?shù)母杏X。這些西班牙科學(xué)家通過核磁共振掃描所發(fā)現(xiàn)的是當(dāng)受到反向的 刺激時,焦慮病人大腦中所謂的行為抑制系統(tǒng)(BIS)過度活躍。 此項研究焦慮的神經(jīng)生理模型通過以缺乏鼓勵甚至是懲罰的形式刺激正常情況下的BIS;先天對恐懼的刺激是那些不需要經(jīng)過認(rèn) 識就能產(chǎn)生的的刺激。 大腦中與BIS相關(guān)的區(qū)域是大腦的杏仁核系統(tǒng)。因此,這些容易焦慮的病人在刺激(懲罰或缺乏鼓勵)下臉部會表現(xiàn)出不合適的 反應(yīng)。一旦出現(xiàn)表情的異常,就可對大腦相關(guān)區(qū)域進(jìn)行檢測,驗證是否存在什么敏感的機(jī)制。 這個研究團(tuán)隊對63名受檢者進(jìn)行了敏感性試驗和核磁共振檢測,對不同大腦結(jié)構(gòu)中的灰色部分進(jìn)行了定量。 研究發(fā)現(xiàn)在右大腦杏仁核中有大量灰色區(qū)域的個體在測試中得分較高。 來源:medinews.com Brain Anatomy Differences Predispose Patients to Anxiety Disorders An imaging study has revealed the existence of a different anatomy in small regions of the brain, which could help explain why the same stimulus triggers anxiety in some individuals and not in others. According to the study抯 investigators, from the Universitat Jaume I. of Castell髇 (UJI; Castell?de la Plana; Spain), the Universitat Aut騨oma of Barcelona (UAB; Spain), and the company Eresa (Valencia, Spain), some individuals?brain act via a mechanism that makes them more apt to suffer and give in to anxiety more than other brains when confronted with identical situations. In patients with anxiety disorders, an excessive activation in the face of specific stimuli exists, setting off a disproportionate response to experiences subjectively understood to be tense, stressful, or dangerous. The study was published in the June 2007 issue of the journal NeuroImage. These individuals?anxiety would be determined by their excessive activation of fear or their inability to tackle the needs that they consider important. Therefore, it would be difficult for them to react to a situation of tension or stress, and this would consequently trigger a feeling of frustration; thus, the frequent relation of complaints of a depressive nature arises. A disproportionate feeling of lack of reward, or even punishment, is produced during anxiety disorders. What these Spanish scientists have discovered through functional magnetic resonance imaging (fMRI) scanning is that an excessive activation of the so-called behavioral inhibition system (BIS) exists in this type of patients when confronted with adverse stimuli. The basis of the neuropsychologic model of anxiety proposed by the present-day psychology thought is that the natural existence of BIS is triggered by stimuli in the form of punishment or lack of reward; innate stimuli of fear in which specific stimuli are experienced as a threat without the need for learning. The brain regions involved in the anatomic substrate of BIS are the cerebral amygdala and the septohippocampal system. Therefore, this altered response of anxiety and hyperactivity in patients who are predisposed to suffer anxiety in the face of such stimuli (punishment or lack of reward) can be measured with its incidence on these encephalic areas while patients undergo a test of sensitivity to mechanisms of reward or punishment. A team of researchers at UJI and UAB in collaboration with Eresa, an image diagnosis company, has carried out a study with 63 individuals who were subjected to the sensitivity test and an fMRI study, which quantified the volume of gray matter in the different encephalic structures. The study revealed that a greater volume of gray encephalic matter exists in the brain areas of the right parahippocampus, the right cerebral amygdala, and the left anterior parahippocampus of some individuals who went on to obtain higher scores in the test. This coincides with some anatomic regions that are triggered when confronted with punishment or reward stimuli. 本文關(guān)鍵字:
焦慮 大腦的解剖結(jié)構(gòu)
《美迪醫(yī)訊》歡迎您參與新聞投稿,業(yè)務(wù)咨詢: 美迪醫(yī)療網(wǎng)業(yè)務(wù)咨詢更多關(guān)于 焦慮 大腦的解剖結(jié)構(gòu) 的新聞
《上海醫(yī)療器械批發(fā)》產(chǎn)品推薦
|
合作支持:中華醫(yī)學(xué)會 | 中華醫(yī)院管理學(xué)會 | 國家食品藥品監(jiān)督管理家用護(hù)理器械商城 | 國藥勵展展覽有限責(zé)任公 | 醫(yī)學(xué)裝備協(xié)會 |
刊登廣告 | 友情鏈接 | 廣告代理商加盟 | 關(guān)于美迪 | 法律聲明 | 隱私保護(hù) | 網(wǎng)站地圖 |
把美迪網(wǎng)放進(jìn)收藏夾 把美迪醫(yī)療網(wǎng)介紹給我的朋友 給美迪醫(yī)療網(wǎng)留言
美迪醫(yī)療網(wǎng)廣告業(yè)務(wù)聯(lián)系:021-51601230 產(chǎn)品咨詢業(yè)務(wù)聯(lián)系:021-51601230 傳真:021-56532303 美迪醫(yī)療網(wǎng)業(yè)務(wù)咨詢 互聯(lián)網(wǎng)藥品信息服務(wù)許可證:(滬)-經(jīng)營性-2009-0003 中華人民共和國電信與信息服務(wù)業(yè)務(wù)經(jīng)營許可證:(滬)B2-20090029 滬ICP備14001091號-8 公安備案號 31010602000199 醫(yī)療器械經(jīng)營許可證: 滬靜藥監(jiān)械經(jīng)營許20210003號 第二類醫(yī)療器械經(jīng)營備案憑證: 滬靜藥監(jiān)械經(jīng)營備20220042號 營業(yè)執(zhí)照:統(tǒng)一社會信用代碼91310108676284138X互聯(lián)網(wǎng)藥品信息服務(wù)資格書:(滬)-非經(jīng)營性-2023-0081 |