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梦之真理
企业,投机,上市,套现,泡妞
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梦之真理
梦之真理
·
2022-12-02
[666] [鼓掌]
马斯克的猴子正在推动一场脑机革命,代价是“香蕉奶昔”
脑机接口的革命,来得实在太快了。
马斯克的猴子正在推动一场脑机革命,代价是“香蕉奶昔”
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梦之真理
梦之真理
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2021-10-06
$华夏文化科技(01566)$
意料之[难过]
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梦之真理
梦之真理
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2021-07-07
$BSQUARE科技(BSQR)$
不错,主力洗盘太狠了,上看12[财迷]
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梦之真理
梦之真理
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2021-07-02
$BSQUARE科技(BSQR)$
套死[流泪]
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梦之真理
梦之真理
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2021-05-26
$老虎证券(TIGR)$
感谢老虎发的红包,看看一年内账户能否翻十倍[财迷]
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梦之真理
梦之真理
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2021-05-19
$WTI原油2107(CL2107)$
$WTI原油主连(CLmain)$
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梦之真理
梦之真理
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2021-05-12
$虎都(02399)$
此股已废,散户太多,难涨哦
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梦之真理
梦之真理
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2021-05-10
$Protagenic Therapeutics, Inc.(PTIX)$
干
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梦之真理
梦之真理
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2021-04-21
$WTI原油2106(CL2106)$
我也来
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梦之真理
梦之真理
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2021-01-29
$9 Meters Biopharma Inc.(NMTR)$
梭哈,五元见
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[鼓掌] ","listText":"[666] [鼓掌] ","text":"[666] [鼓掌]","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":0,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/620707042","repostId":"1137562033","repostType":2,"repost":{"id":"1137562033","kind":"news","pubTimestamp":1669950387,"share":"https://www.laohu8.com/m/news/1137562033?lang=&edition=full","pubTime":"2022-12-02 11:06","market":"us","language":"zh","title":"马斯克的猴子正在推动一场脑机革命,代价是“香蕉奶昔”","url":"https://stock-news.laohu8.com/highlight/detail?id=1137562033","media":"硅星人","summary":"脑机接口的革命,来得实在太快了。","content":"<html><head></head><body><p>脑机接口的革命,来得实在太快了。</p><p>马斯克在硅谷举行的Neuralink沟通会上透露:</p><blockquote><b>首款脑机接口产品,名为N1,最快6个月内就可以启动人类测试。</b></blockquote><p>“为了我们的首次临床测试,我们正在非常努力地加紧各项工作准备,”马斯克轻描淡写地表示。</p><p>“我们绝大部分的文书资料已经提交到了 FDA。我们估计大约再过6个月时间,大家就可以看到 Neuralink 装到人的脑袋上了。”</p><p><img src=\"https://static.tigerbbs.com/881053692fafe079f3a3d49c36ec151c\" tg-width=\"640\" tg-height=\"385\" referrerpolicy=\"no-referrer\"/></p><p>Neuralink 拟推出的 N1 脑机接口(内部构造) 图片来源:Neuralink</p><p>香蕉奶昔,赛博朋克的第一生产力</p><p>整场发布会看下来,硅星人有一个最核心的感受:</p><p><b>如果没有香蕉奶昔(banana smoothie),这场脑机接口的革命,恐怕不会来得这么快……</b></p><p>为什么这么说呢?</p><p>大家可能知道Neuralink这家公司过去以来一直是用猴子和猪等动物进行实验的。有名有姓的猴子,就有至少8只,没名字的预备役更是数不胜数。</p><p>但是根据规定,Neuralink不能强迫它们参与配合实验……</p><p>更何况,早在启动活体实验的初期Neuralink就已经明白一个道理:强扭的瓜不甜。让这些猴子做实验哪怕它们有一点被迫、不情愿,对实验效果都会有影响。</p><p>于是Neuralink 开发出了一套“自愿参与”原则的激励方案:</p><p><b>只要来做实验,就有无限量的香蕉奶昔供应!</b></p><p><img src=\"https://static.tigerbbs.com/3a4f3b1a85e86a5cb522b6217c4f1c88\" tg-width=\"611\" tg-height=\"345\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>具体来说,就像条件反射那样,Neuralink 的饲养工作人员参与设计了一套强化机制:每当猴子参与了当前的实验,完成了一次操作,就会得到香蕉奶昔……</p><p>这样,越做实验,喝的越爽。久而久之,就形成了刺激强化的反馈机制。</p><p>下图你可以看到,这些猴子一边做着实验,一边从面前的管子里嘬着饮料。</p><p><b>简直可以说是:高高兴兴做实验,开开心心喝奶昔……</b></p><p>这样的反馈机制,在 Neuralink 最近两年的研发工作中,扮演了相当重要的角色。</p><p><b>首先来看下面这个脑控光标的实验:</b></p><p><img src=\"https://static.tigerbbs.com/9a8bf4ff89ae652fc4e9081500a27cb7\" tg-width=\"640\" tg-height=\"292\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>(虽然看起来猴子都会打字了,然而并非如此,猴子怎么可能懂英语呢?)</p><p>下一个键要按什么,实验工作人员早就设计好了,会在猴子面前 MacBook 的虚拟键盘上,会以黄色显眼的方式注明。</p><p>而在激励机制的作用下,只要猴子通过意念脑控光标“移动”到下一个要按的键上,并发出“按下”的信号,管子里就会流出香甜可口的香蕉奶昔……</p><p><b>在对于甜品的渴望驱使下,猴子打出了这么一句话:搞点夜点心切切吧 (can i please have snacks)……</b></p><p><img src=\"https://static.tigerbbs.com/abc8fe91e2df061111738ae2353e113d\" tg-width=\"640\" tg-height=\"357\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>但 Neuralink 并不满足于让猴子用光标打字。毕竟它的阶段性目标之一,是让(瘫痪)的人们可以通过脑机信号来操控包括手机在内的常用电子设备。</p><p><b>所以,这家公司的猴子大军,正在香蕉奶昔的驱动下,做着各种各样的训练工作,包括并不限于:</b></p><ul><li><p>点按和拖拽</p></li><li><p>滑动输入</p></li><li><p>手写</p></li><li><p>手势识别</p></li></ul><p><b>等等……</b></p><p><img src=\"https://static.tigerbbs.com/69e330ff9c4d8ee25e4043bf843f0492\" tg-width=\"640\" tg-height=\"298\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>以手写为例:</p><p>“一开始还是虚拟键盘。现在我们已经可以直接用脑机界面来读取信号,结合画面中的图形,和训练得到的信号模式,来精准地判断猴子在屏幕上写的是什么字”,一位 Neuralink 技术专家透露。</p><p>这样下去,猴子恐怕真要“学会”写字、拼词了?</p><p><b>以及,香蕉奶昔还能刺激猴子自己去给脑机接口充电!</b></p><p>这样简直是给 Neuralink 的工作人员,省了大麻烦了……</p><p>具体机制是这样设计的:</p><p>他们将一棵树做成了“奶茶店”,然后把充电板放在了装饰的树杈里:</p><p><img src=\"https://static.tigerbbs.com/2ca9c13ceb6607c8aec8de3743b51912\" tg-width=\"640\" tg-height=\"338\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>这样,只要猴子想喝香蕉奶昔了,就会跑过去嘬管子。</p><p><b>结果它的脑袋会正好对准充电板,一边喝饮料,一边充电。</b></p><p>这设计,脑回路实在是很有意思!</p><p><img src=\"https://static.tigerbbs.com/ab466e4985357060e0ed96368e3f1d5a\" tg-width=\"500\" tg-height=\"267\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>这场发布会的各嘉宾发言,总的来说给硅星人一个感觉,就是:</p><p>我们在实验中遇到了一个技术问题 → 想了很多办法都解决不了 → 哎最后还得香蕉大法 → 没办法香蕉它真的管用啊!</p><p><b>没想到实现赛博朋克,香蕉奶昔竟成了第一生产力……</b></p><p>(期待回头 Neuralink 实现产品多元化,推出自主品牌的香蕉奶昔……)</p><p><img src=\"https://static.tigerbbs.com/d6c2314f0dfb833bc4a3e56c6ae2c764\" tg-width=\"640\" tg-height=\"288\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Concord Food</p><p>从香蕉奶昔,到猴脑的可塑性</p><p>当然,除了香蕉之外,Neuralink也在用一些更加“正经”和更“高科技”的刺激方式,来训练出更厉害的猴子,好让它们转而更好地训练 Neuralink 开发下一代脑机接口产品需要的各种信号解码器、算法模型、测试工具等等。</p><p>而在下面这个例子中,Neuralink 就是利用了更复杂的刺激方法。</p><p>这家公司有两个阶段性目标,刚才提到了一个,也即帮助(瘫痪)人士获得运动功能。</p><p><b>而另一个阶段性目标,则是视觉义体:通过外部设备+脑机接口的方式,帮助那些一直生活在黑暗中的视障人士,重获光明。</b></p><p>绝大多数视障者,问题都出在眼球里,他们的视神经,大脑中的视觉皮层,很有可能仍然是完好的。于是 Neuralink 希望能够用脑机接口的方式,通过外置传感器(摄像头)来将信号直接传入视觉皮层,从而让失明者重获光明。为了实现这个目标,Neuralink 在猴子的猴脑视觉皮层部位开了颅,装了脑机接口进去。</p><p><img src=\"https://static.tigerbbs.com/0c064703b54276484f2f559b73283e55\" tg-width=\"535\" tg-height=\"428\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p><b>然而这次的工作更为复杂:</b>不再是读取脑信号控制外设这种简单的逻辑,而是完全反过来,从外部获取的视觉内容,将它编译为原始的脑神经信号,传回到大脑里。</p><p>猴子不是人,没有办法告诉实验人员自己看到了还是没看到、看到了什么东西。于是,Neuralink 又设计了一套新的刺激机制(逆相关reverse correlation,神经科学常用的方法):</p><p><img src=\"https://static.tigerbbs.com/ec6e64210fcf5baecf55f734a330f94b\" tg-width=\"640\" tg-height=\"305\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p><b>1)用脑机接口输入的人工干预信号,刺激猴子的眼球进行移动(比如可以简单理解为);</b></p><p><b>2)用外置的眼球追踪设备,验证实际的眼球移动矢量,是否与人工信号相符;</b></p><p><b>3)当结果相符的时候,使用香蕉奶昔进行激励。</b></p><p>如下图所示:绿色线代表眼球的移动路径,闪现的白点作为对照。你会看到,猴子的眼球突然朝着没有出现白点的位置移动,正是因为通过脑机接口收到了人工干预的信号。</p><p>最一开始,眼球的移动矢量和人工信号的相符的程度并不高。</p><p><b>然而有趣的是,随着测试时间变长,次数增加,猴子越做越熟练,符合程度越来越高。</b></p><p><img src=\"https://static.tigerbbs.com/1748e97d5f1fac25d216b840062d0ecf\" tg-width=\"600\" tg-height=\"331\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>大脑是指一种具有可塑性的组织,简单来说也即大脑内部的突触、神经元之间的连接可以由于学习和经验的影响建立新的连接,从而影响个体的行为。</p><p>Neuralink 团队正是寄希望于这种可塑性,通过不断的训练来让猴子在外界信号的辅助下,获得一种非原生的低维视觉。</p><p><b>而如果将这种技术的应用规模进一步扩容,让信号的复杂程度变高,从单一的矢量,升级为线、面、形状、颜色,让像素数量进一步增加……</b></p><p><b>那样,不就能够让那些失明的人,重获视觉了吗?</b></p><p>想法是伟大的,前景是乐观的。然而挑战仍然重重,还有很多技术门槛需要跨越。</p><p>Neuralink 提供了一张模拟图。它展示了在不远的未来,通过Neuralink脑机接口的视觉义体技术,大致能够获得的视觉(注意这并不是真实图片,只是模拟的效果)。</p><p>在一个理想的视觉义体套件中,通过一个安装在眼部高度的摄像机获取图像,传入手机进行信号处理,再通过脑机接口传输到大脑中的视觉皮层。</p><p><img src=\"https://static.tigerbbs.com/7de47bd60f04187618440d8d1efde85c\" tg-width=\"640\" tg-height=\"327\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p><p>这不禁令我想起了《赛博朋克2077》。在游戏中,主角拿到的头两件赛博义体(cyberware)之一,就是视觉义体 Kiroshi Optics。有了它,主角在正常视觉的基础上,还获得了扫描电子器件并对其进行黑客攻击的能力……</p><p><img src=\"https://static.tigerbbs.com/4631fb6c72d79ff47fd8f5b1f1ba7c22\" tg-width=\"640\" tg-height=\"356\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:TriggerStudio/CD PROJEKT RED/Netflix</p><p>回到现实世界<b>,视觉</b>义<b>体暂时还没有在游戏里那么酷。</b></p><p>麻省理工科技评论的一位生物科技作者写道指出,</p><p>“马斯克宣称义体能够‘恢复’视觉——也许在很久以后的未来才能实现。<b>能够通过义体产生的视觉并不是你和我所拥有的视觉。它更像是点状的光斑,也许能够通过组合的方式来形成一种简单的显示效果,就像老式的灯泡记分牌那样。”</b></p><p><img src=\"https://static.tigerbbs.com/f9d801892a136783cdce2d5eea2ac508\" tg-width=\"596\" tg-height=\"323\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:@antonioregalado</p><p><img src=\"https://static.tigerbbs.com/de66eb36d8b3b341cbb2b254e5232531\" tg-width=\"640\" tg-height=\"304\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:MERIT</p><p>即便如此,让失明者重获光明,仍然是一项有着重大意义的技术使命。</p><p>当然,赛博朋克作为一种文化的诸多优秀文艺作品,也为人类过于依赖科技的未来敲响警钟。尽管Neuralink掀起的这场脑机接口技术革命令人兴奋神往,它的诸多风险仍然不可小觑。</p><p>在过去一年时间里,Neuralink 也在加紧提高技术安全性,更重要的是确保使用者的生命安全。该公司的努力包括:</p><ul><li><p>开发了在实验室环境下,用于测试工作的,对人脑组织进行替代的技术,比如使用培养皿培植的皮质细胞进行电极测试(下图)。</p><p><b>“最终目标是在未来产品研发和测试中,降低甚至完全消除对活体动物和临床试验者的需要,”一位 Neuralink 专家表示。</b></p><p><img src=\"https://static.tigerbbs.com/f3370eee74ef4d93e638d8c867ed841f\" tg-width=\"640\" tg-height=\"377\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p></li><li><p>开发了无需在脑膜 (dura) 上开创,直接在脑膜外进行电极植入的机器人手术技术(在脑膜上开创会导致恢复过程中生成大量组织,覆盖包裹住接口设备,容易带来感染隐患,并且非常不便于后期设备维护)</p><p><img src=\"https://static.tigerbbs.com/1fa8f5831619ad89656109e369f33b46\" tg-width=\"640\" tg-height=\"353\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:Neuralink</p></li><li>将向上兼容能力(可升级性 upgradability)作为技术研发的核心原则之一。正如前一条,在颅骨上开一个硬币大小的口子,就算尽力控制创口,仍然会面临后期愈合而产生的组织的问题,对设备的后期移除带来巨大困难。升级硬件困难,所以硬件必须最大限度保证软件升级的能力。</li></ul><p><b>“毕竟没人想像每年换一台 iPhone 那样换脑机接口,最好的就是一步到位,”马斯克说到。</b></p><p>现实世界中,这场赛博朋克的革命的第一把火,看来也已经点燃了。</p><p>没准将来的 Neuralink,能够成为像“荒坂” (Arasaka) 那样的赛博格技术巨头……</p><p>“我笑了,因为伊隆·马斯克通过NeuraLink.™直接将一个表情包发送到我的前颅皮层。哦,我的天啊,这太棒了。我眨了两次眼睛,用NeuraLike™赞了它,然后非常认真地想:“谢谢先生!请发送比特币。”我睁开眼睛,突然发现天已经黑了,而我正在掐着一个人的脖子。”</p><p><img src=\"https://static.tigerbbs.com/701b651d1724bd55535b8380fff15248\" tg-width=\"592\" tg-height=\"372\" referrerpolicy=\"no-referrer\"/></p><p><img src=\"https://static.tigerbbs.com/ae7d49e809de085496b51cf7f2f836e4\" tg-width=\"640\" tg-height=\"396\" referrerpolicy=\"no-referrer\"/></p><p>图片来源:网络</p></body></html>","source":"gxr","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>马斯克的猴子正在推动一场脑机革命,代价是“香蕉奶昔”</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; 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height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\n马斯克的猴子正在推动一场脑机革命,代价是“香蕉奶昔”\n</h2>\n\n<h4 class=\"meta\">\n\n\n2022-12-02 11:06 北京时间 <a href=https://mp.weixin.qq.com/s?__biz=MzI3ODg4ODEwMA==&mid=2247524347&idx=1&sn=b2e61824c0a62ec065c1888f72605f3a&chksm=eb52f430dc257d26bf55f50a24c7903f8062fd3d1ab9c75df499daa678473db6f1f6ee72c2f5&mpshare=1&scene=23&srcid=1202Ey6qC9jgexAb6zp58Y88&sharer_sharetime=1669941331728&sharer_shareid=00a55b671777cf0e253d4693000ead51#rd><strong>硅星人</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>脑机接口的革命,来得实在太快了。马斯克在硅谷举行的Neuralink沟通会上透露:首款脑机接口产品,名为N1,最快6个月内就可以启动人类测试。“为了我们的首次临床测试,我们正在非常努力地加紧各项工作准备,”马斯克轻描淡写地表示。“我们绝大部分的文书资料已经提交到了 FDA。我们估计大约再过6个月时间,大家就可以看到 Neuralink 装到人的脑袋上了。”Neuralink 拟推出的 N1 脑机...</p>\n\n<a href=\"https://mp.weixin.qq.com/s?__biz=MzI3ODg4ODEwMA==&mid=2247524347&idx=1&sn=b2e61824c0a62ec065c1888f72605f3a&chksm=eb52f430dc257d26bf55f50a24c7903f8062fd3d1ab9c75df499daa678473db6f1f6ee72c2f5&mpshare=1&scene=23&srcid=1202Ey6qC9jgexAb6zp58Y88&sharer_sharetime=1669941331728&sharer_shareid=00a55b671777cf0e253d4693000ead51#rd\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"https://static.tigerbbs.com/a370dedf78ec8709f7980cc3b5d33703","relate_stocks":{"TSLA":"特斯拉"},"source_url":"https://mp.weixin.qq.com/s?__biz=MzI3ODg4ODEwMA==&mid=2247524347&idx=1&sn=b2e61824c0a62ec065c1888f72605f3a&chksm=eb52f430dc257d26bf55f50a24c7903f8062fd3d1ab9c75df499daa678473db6f1f6ee72c2f5&mpshare=1&scene=23&srcid=1202Ey6qC9jgexAb6zp58Y88&sharer_sharetime=1669941331728&sharer_shareid=00a55b671777cf0e253d4693000ead51#rd","is_english":false,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1137562033","content_text":"脑机接口的革命,来得实在太快了。马斯克在硅谷举行的Neuralink沟通会上透露:首款脑机接口产品,名为N1,最快6个月内就可以启动人类测试。“为了我们的首次临床测试,我们正在非常努力地加紧各项工作准备,”马斯克轻描淡写地表示。“我们绝大部分的文书资料已经提交到了 FDA。我们估计大约再过6个月时间,大家就可以看到 Neuralink 装到人的脑袋上了。”Neuralink 拟推出的 N1 脑机接口(内部构造) 图片来源:Neuralink香蕉奶昔,赛博朋克的第一生产力整场发布会看下来,硅星人有一个最核心的感受:如果没有香蕉奶昔(banana smoothie),这场脑机接口的革命,恐怕不会来得这么快……为什么这么说呢?大家可能知道Neuralink这家公司过去以来一直是用猴子和猪等动物进行实验的。有名有姓的猴子,就有至少8只,没名字的预备役更是数不胜数。但是根据规定,Neuralink不能强迫它们参与配合实验……更何况,早在启动活体实验的初期Neuralink就已经明白一个道理:强扭的瓜不甜。让这些猴子做实验哪怕它们有一点被迫、不情愿,对实验效果都会有影响。于是Neuralink 开发出了一套“自愿参与”原则的激励方案:只要来做实验,就有无限量的香蕉奶昔供应!图片来源:Neuralink具体来说,就像条件反射那样,Neuralink 的饲养工作人员参与设计了一套强化机制:每当猴子参与了当前的实验,完成了一次操作,就会得到香蕉奶昔……这样,越做实验,喝的越爽。久而久之,就形成了刺激强化的反馈机制。下图你可以看到,这些猴子一边做着实验,一边从面前的管子里嘬着饮料。简直可以说是:高高兴兴做实验,开开心心喝奶昔……这样的反馈机制,在 Neuralink 最近两年的研发工作中,扮演了相当重要的角色。首先来看下面这个脑控光标的实验:图片来源:Neuralink(虽然看起来猴子都会打字了,然而并非如此,猴子怎么可能懂英语呢?)下一个键要按什么,实验工作人员早就设计好了,会在猴子面前 MacBook 的虚拟键盘上,会以黄色显眼的方式注明。而在激励机制的作用下,只要猴子通过意念脑控光标“移动”到下一个要按的键上,并发出“按下”的信号,管子里就会流出香甜可口的香蕉奶昔……在对于甜品的渴望驱使下,猴子打出了这么一句话:搞点夜点心切切吧 (can i please have snacks)……图片来源:Neuralink但 Neuralink 并不满足于让猴子用光标打字。毕竟它的阶段性目标之一,是让(瘫痪)的人们可以通过脑机信号来操控包括手机在内的常用电子设备。所以,这家公司的猴子大军,正在香蕉奶昔的驱动下,做着各种各样的训练工作,包括并不限于:点按和拖拽滑动输入手写手势识别等等……图片来源:Neuralink以手写为例:“一开始还是虚拟键盘。现在我们已经可以直接用脑机界面来读取信号,结合画面中的图形,和训练得到的信号模式,来精准地判断猴子在屏幕上写的是什么字”,一位 Neuralink 技术专家透露。这样下去,猴子恐怕真要“学会”写字、拼词了?以及,香蕉奶昔还能刺激猴子自己去给脑机接口充电!这样简直是给 Neuralink 的工作人员,省了大麻烦了……具体机制是这样设计的:他们将一棵树做成了“奶茶店”,然后把充电板放在了装饰的树杈里:图片来源:Neuralink这样,只要猴子想喝香蕉奶昔了,就会跑过去嘬管子。结果它的脑袋会正好对准充电板,一边喝饮料,一边充电。这设计,脑回路实在是很有意思!图片来源:Neuralink这场发布会的各嘉宾发言,总的来说给硅星人一个感觉,就是:我们在实验中遇到了一个技术问题 → 想了很多办法都解决不了 → 哎最后还得香蕉大法 → 没办法香蕉它真的管用啊!没想到实现赛博朋克,香蕉奶昔竟成了第一生产力……(期待回头 Neuralink 实现产品多元化,推出自主品牌的香蕉奶昔……)图片来源:Concord Food从香蕉奶昔,到猴脑的可塑性当然,除了香蕉之外,Neuralink也在用一些更加“正经”和更“高科技”的刺激方式,来训练出更厉害的猴子,好让它们转而更好地训练 Neuralink 开发下一代脑机接口产品需要的各种信号解码器、算法模型、测试工具等等。而在下面这个例子中,Neuralink 就是利用了更复杂的刺激方法。这家公司有两个阶段性目标,刚才提到了一个,也即帮助(瘫痪)人士获得运动功能。而另一个阶段性目标,则是视觉义体:通过外部设备+脑机接口的方式,帮助那些一直生活在黑暗中的视障人士,重获光明。绝大多数视障者,问题都出在眼球里,他们的视神经,大脑中的视觉皮层,很有可能仍然是完好的。于是 Neuralink 希望能够用脑机接口的方式,通过外置传感器(摄像头)来将信号直接传入视觉皮层,从而让失明者重获光明。为了实现这个目标,Neuralink 在猴子的猴脑视觉皮层部位开了颅,装了脑机接口进去。图片来源:Neuralink然而这次的工作更为复杂:不再是读取脑信号控制外设这种简单的逻辑,而是完全反过来,从外部获取的视觉内容,将它编译为原始的脑神经信号,传回到大脑里。猴子不是人,没有办法告诉实验人员自己看到了还是没看到、看到了什么东西。于是,Neuralink 又设计了一套新的刺激机制(逆相关reverse correlation,神经科学常用的方法):图片来源:Neuralink1)用脑机接口输入的人工干预信号,刺激猴子的眼球进行移动(比如可以简单理解为);2)用外置的眼球追踪设备,验证实际的眼球移动矢量,是否与人工信号相符;3)当结果相符的时候,使用香蕉奶昔进行激励。如下图所示:绿色线代表眼球的移动路径,闪现的白点作为对照。你会看到,猴子的眼球突然朝着没有出现白点的位置移动,正是因为通过脑机接口收到了人工干预的信号。最一开始,眼球的移动矢量和人工信号的相符的程度并不高。然而有趣的是,随着测试时间变长,次数增加,猴子越做越熟练,符合程度越来越高。图片来源:Neuralink大脑是指一种具有可塑性的组织,简单来说也即大脑内部的突触、神经元之间的连接可以由于学习和经验的影响建立新的连接,从而影响个体的行为。Neuralink 团队正是寄希望于这种可塑性,通过不断的训练来让猴子在外界信号的辅助下,获得一种非原生的低维视觉。而如果将这种技术的应用规模进一步扩容,让信号的复杂程度变高,从单一的矢量,升级为线、面、形状、颜色,让像素数量进一步增加……那样,不就能够让那些失明的人,重获视觉了吗?想法是伟大的,前景是乐观的。然而挑战仍然重重,还有很多技术门槛需要跨越。Neuralink 提供了一张模拟图。它展示了在不远的未来,通过Neuralink脑机接口的视觉义体技术,大致能够获得的视觉(注意这并不是真实图片,只是模拟的效果)。在一个理想的视觉义体套件中,通过一个安装在眼部高度的摄像机获取图像,传入手机进行信号处理,再通过脑机接口传输到大脑中的视觉皮层。图片来源:Neuralink这不禁令我想起了《赛博朋克2077》。在游戏中,主角拿到的头两件赛博义体(cyberware)之一,就是视觉义体 Kiroshi Optics。有了它,主角在正常视觉的基础上,还获得了扫描电子器件并对其进行黑客攻击的能力……图片来源:TriggerStudio/CD PROJEKT RED/Netflix回到现实世界,视觉义体暂时还没有在游戏里那么酷。麻省理工科技评论的一位生物科技作者写道指出,“马斯克宣称义体能够‘恢复’视觉——也许在很久以后的未来才能实现。能够通过义体产生的视觉并不是你和我所拥有的视觉。它更像是点状的光斑,也许能够通过组合的方式来形成一种简单的显示效果,就像老式的灯泡记分牌那样。”图片来源:@antonioregalado图片来源:MERIT即便如此,让失明者重获光明,仍然是一项有着重大意义的技术使命。当然,赛博朋克作为一种文化的诸多优秀文艺作品,也为人类过于依赖科技的未来敲响警钟。尽管Neuralink掀起的这场脑机接口技术革命令人兴奋神往,它的诸多风险仍然不可小觑。在过去一年时间里,Neuralink 也在加紧提高技术安全性,更重要的是确保使用者的生命安全。该公司的努力包括:开发了在实验室环境下,用于测试工作的,对人脑组织进行替代的技术,比如使用培养皿培植的皮质细胞进行电极测试(下图)。“最终目标是在未来产品研发和测试中,降低甚至完全消除对活体动物和临床试验者的需要,”一位 Neuralink 专家表示。图片来源:Neuralink开发了无需在脑膜 (dura) 上开创,直接在脑膜外进行电极植入的机器人手术技术(在脑膜上开创会导致恢复过程中生成大量组织,覆盖包裹住接口设备,容易带来感染隐患,并且非常不便于后期设备维护)图片来源:Neuralink将向上兼容能力(可升级性 upgradability)作为技术研发的核心原则之一。正如前一条,在颅骨上开一个硬币大小的口子,就算尽力控制创口,仍然会面临后期愈合而产生的组织的问题,对设备的后期移除带来巨大困难。升级硬件困难,所以硬件必须最大限度保证软件升级的能力。“毕竟没人想像每年换一台 iPhone 那样换脑机接口,最好的就是一步到位,”马斯克说到。现实世界中,这场赛博朋克的革命的第一把火,看来也已经点燃了。没准将来的 Neuralink,能够成为像“荒坂” (Arasaka) 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