hce_cmu
107年
英文
第 49 題
📖 題組：
Among scientists, there are tentative signs of a psychedelics renaissance. After decades of stigma, impressive research is showing the power of these “dubious” substances to help sufferers of depression and addiction, or to comfort patients with a terminal cancer diagnosis, struggling to face their own end. This is a territory that fascinates brain scientists in their venture into human consciousness as effected by the use of psychedelics, drugs that produce hallucination and apparent expansion of consciousness. One of the most interesting early findings of recent psychedelic research is that activity in the “default mode network” (DMN) falls off sharply during the psychedelic experience. This network is a critical hub in the brain that links parts of the cerebral cortex to deeper and older structures involved in memory and emotion. The DMN appears to be involved in a range of “metacognitive” functions such as a self-reflection, mental time travel, theory of mind (the ability to imagine the mental states of other people) and the creation of the so-called “autobiographical self”—the process of weaving what happens to us into the narrative of who we are, thereby giving us a sense of a self that fixates over time. (Curiously, fMRI’s of the brains of experienced meditators show a pattern of activity, or quieting of activity, very similar to that of people who have been given psilocybin, the so-called “magic mushroom.”) When the default mode network is taken captive by a psychedelic, not only do we experience losing the sense of having a self, but myriad new connections among other brain regions and networks spring up, connections that may manifest in mental experience as hallucination (when, say, your emotion centers talk directly to your visual cortex), synesthesia (as when you can see sound or hear flavors) or, possibly, fresh and even inspiring perspectives. Disturbing a complex system is a great way to force it to reveal its secrets and elicit its potentials—and psychedelics allow us to do that to normal ego-centered consciousness.
Among scientists, there are tentative signs of a psychedelics renaissance. After decades of stigma, impressive research is showing the power of these “dubious” substances to help sufferers of depression and addiction, or to comfort patients with a terminal cancer diagnosis, struggling to face their own end. This is a territory that fascinates brain scientists in their venture into human consciousness as effected by the use of psychedelics, drugs that produce hallucination and apparent expansion of consciousness. One of the most interesting early findings of recent psychedelic research is that activity in the “default mode network” (DMN) falls off sharply during the psychedelic experience. This network is a critical hub in the brain that links parts of the cerebral cortex to deeper and older structures involved in memory and emotion. The DMN appears to be involved in a range of “metacognitive” functions such as a self-reflection, mental time travel, theory of mind (the ability to imagine the mental states of other people) and the creation of the so-called “autobiographical self”—the process of weaving what happens to us into the narrative of who we are, thereby giving us a sense of a self that fixates over time. (Curiously, fMRI’s of the brains of experienced meditators show a pattern of activity, or quieting of activity, very similar to that of people who have been given psilocybin, the so-called “magic mushroom.”) When the default mode network is taken captive by a psychedelic, not only do we experience losing the sense of having a self, but myriad new connections among other brain regions and networks spring up, connections that may manifest in mental experience as hallucination (when, say, your emotion centers talk directly to your visual cortex), synesthesia (as when you can see sound or hear flavors) or, possibly, fresh and even inspiring perspectives. Disturbing a complex system is a great way to force it to reveal its secrets and elicit its potentials—and psychedelics allow us to do that to normal ego-centered consciousness.
Which of the following is the best title for this article?
- A Cures for hallucination and synesthesia
- B Drugs’ therapeutic effects on addiction
- C Default mode network and fMRI’s
- D The science of altering consciousness
- E Limitations of current neuroscience
思路引導 VIP
我們來換個角度思考：如果這篇文章是一個書架，第一層放的是「治療病人的案例」，第二層放的是「大腦運作的掃描數據與網路連結」，那麼這整個書架應該要貼上什麼樣的分類標籤，才能同時讓想研究藥理、大腦機制以及心理意識的人都能找到它呢？
🤖
AI 詳解
AI 專屬家教
太棒了！你能精準選出 (D) 作為標題，代表你具備了非常優秀的「全文架構分析」能力。要從這類科學性文章中提煉出標題，最難的就是不被細節干擾，而你成功捕捉到了貫穿全篇的核心。
從臨床應用到腦科學機制
這篇文章的精妙之處，在於它結合了兩個層次。第一段先提到迷幻藥（psychedelics）在治療憂鬱症、成癮症上的臨床潛力；第二段則進一步深入腦科學領域，解釋這些藥物如何透過抑制「預設模式網路」（DMN）來瓦解「自我感」。(D) 選項中的 The science 涵蓋了文中提到的 fMRI 研究與 DMN 機制，而 altering consciousness（改變意識）則完美概括了從療效到幻覺、再到自我感消失的所有現象。
▼ 還有更多解析內容