抑郁症、精神分裂症与心智的神经科学
摘要
Karl Deisseroth 是斯坦福大学的精神科医生兼生物工程学教授，他探索精神病学、神经科学与人类情感的交汇之处——从精神障碍的生物学基础到革命性的光遗传学技术。对话涵盖精神疾病谱系、无意识心智、信仰与自我的起源，以及脑科学作为理解和治疗精神障碍工具的未来前景。
核心要点
- 功能障碍揭示功能本质：正如受损基因揭示基因的功能，精神障碍暴露了正常人类情感与认知的底层架构。
- 终生患病率约25%：结构化精神科访谈估计，大约每4人中就有1人在一生中的某个时间点符合精神障碍的诊断标准；自我报告的数据则更高。
- 精神障碍存在于谱系之中：即使是双相障碍、精神分裂症、神经性厌食症等严重且危及生命的疾病，也与接近正常的功能状态呈连续过渡——并不存在清晰的二元分界线。
- 双相障碍、自闭症和神经性厌食症在群体层面与高智力和较高教育程度正相关，尽管它们会造成严重的痛苦。
- 光遗传学实现了因果神经科学：通过将藻类中的光敏蛋白引入特定神经元，研究人员可以以毫秒级精度开启或关闭单个细胞——从而揭示行为的真正成因，而非仅仅是相关性。
- 决策没有单一起源点：对全脑神经元的记录表明，选择与行为是同时在分布式脑区中产生的，而非来自某一个可识别的来源。
- 自我感可与身体分离：楔前叶皮层中的活动可以使受试者对刺激的体验与其情绪反应相分离——这为冥想和迷幻状态中所描述的体验提供了神经科学基础。
- 新冠后遗神经系统影响可能涉及髓鞘的丧失（髓鞘是长程神经投射的绝缘鞘），这可以解释许多患者出现的认知雾和功能改变。
- 无意识心智仍具有重要的科学价值，即使弗洛伊德的范畴（本我、自我、超我）并不能清晰地对应到神经生物学。
- 人类光遗传学治疗已经起步：一名失明患者在接受视网膜光遗传学基因递送后部分恢复了视力，相关成果发表于Nature Medicine（Roska 等人）。
详细笔记
精神病学：障碍、谱系与诊断
- Deisseroth 更倾向于使用**“障碍”**（disorder）而非”疾病”（disease）或”功能失调”（dysfunction），认为这是最具包容性和诚实性的表述——它捕捉了事物无法正常运转的状态，而不会过度病理化。
- 精神科诊断目前缺乏客观生物标志物：没有能够确认诊断的血液检查或影像学检查。这与其他医学专科形成了鲜明对比。
- 障碍的临床阈值要求社会或职业功能受到损害，而不仅仅是主观痛苦。
- 严格的患病率研究使用由受过培训的临床医生进行的结构化精神科访谈——比自我报告调查更可靠，后者往往会产生偏高的数据。
精神疾病的遗传学与生物学
- bipolar disorder、autism和anorexia nervosa等障碍具有高度遗传性，并在群体层面与较高的智力和教育程度相关——这一悖论指向复杂的进化权衡取舍。
- 精神疾病在本质上”具有很强的生物学性质”，但在临床实践中，用于从生物学层面加以确认的实验室工具目前尚不存在。
- Schizophrenia（精神分裂症）具有家族遗传性；亲属可能表现出schizotypal personality disorder（分裂型人格障碍）——魔法性思维、异常思维模式——而不出现完全的精神病性症状。这说明即使是最严重的障碍，其遗传谱系也是连续的。
精神分析与无意识
- 早期精神病学（弗洛伊德、荣格）从显微镜学转向言语沟通，原因在于人类体验的丰富程度远远超出了当时仅凭细胞所能解释的范围。
- 弗洛伊德的核心贡献：认真对待unconscious mind（无意识心智）作为塑造行为、梦境和症状形成的领域。
- 弗洛伊德与荣格之间的核心分歧：弗洛伊德将无意识几乎完全归结为力比多；荣格则认为无意识是一个更广泛、更完整的平行自我，涵盖人类动机的全部范围——包括阴影（shadow）。
- 现代神经科学表明，本我/自我/超我的框架可能是一种人为的分类——所有驱动力，包括道德层面的驱动力，最终可能都是与原始生存本能相关的冲动的变体，在一种分布式的”市政厅”中相互竞争。
- 精神分析的延续，主要不是作为一种治疗手段，而是因其对艺术、文学、哲学的影响，以及作为洞察内心生活的框架。
光遗传学：原理与进展
- Optogenetics（光遗传学）使用微生物视蛋白——源自单细胞藻类的光敏蛋白（由植物学家 Andrei Famintsyn 于 1866 年首次描述）——通过基因递送插入特定神经元。
- 由于深脑中的神经元通常不响应光线，任何引入的光敏感性都能在噪声之上提供极为清晰的信号。
- 发展时间线：
- 2005年：首次在培养神经元（体外）中得到验证
- 2007年：在行为小鼠中实现；开发了光纤递送方法
- 2009年：具有通用性，可应用于几乎任何细胞类型
- 2012年：实现单细胞分辨率靶向
- 2019年：同时控制 20–50 个单独指定的单个细胞；使小鼠感知到并不存在的视觉刺激
- 2022年：在整个视觉皮层中同时控制数百个单独指定的单个细胞
- 光在脑组织中散射（在脂质-水界面处），限制了穿透深度——通过红外波长、双光子/三光子方法、光纤和三维全息投影加以解决。
- 首例人类光遗传学治疗：Botond Roska（瑞士）在一名视网膜变性失明患者中部分恢复了视力，发表于Nature Medicine（约2021年）。该患者能够用接受治疗的眼睛伸手抓取桌上的物体。
光遗传学与精神病学研究
- Deisseroth 将光遗传学主要定位为一种发现工具，而非直接的临床治疗手段——目标是识别特定症状（动机丧失、anhedonia（快感缺失）、睡眠障碍、能量改变）背后的因果细胞群。
- 一旦确定了因果细胞群，就可以更精确地设计药物、脑刺激疗法和诊断工具。
- 光-电联合记录（光学刺激 + 电记录）为全脑分析提供了两个独立、互补的数据流。
自我、信仰与意识的神经科学
- 颞叶活动与宗教体验相关——患有颞叶癫痫的患者在发作时常报告有精神性先兆。
- 楔前叶皮层包含将自我感与身体感绑定在一起的回路。Deisseroth 的实验室在小鼠中显示，在该区域诱导异常节律会使刺激检测与对该刺激的情绪反应相分离——这是人格解体、冥想超脱状态和迷幻状态的潜在神经模型。
- 在改变意识状态（如 DMT 和 5-MeO-DMT 等迷幻剂）下进行全脑记录，在技术上现已可行，为从细胞分辨率水平理解这些体验提供了路径。
- 决策似乎同时广泛地在皮层、纹状体和丘脑中产生——目前尚未确认任何单一的”自由意志神经元”或起源区域。
新冠后遗神经系统影响
- Deisseroth 的妻子 Michelle Monje（斯坦福）和 Akiko Iwasaki（耶鲁）的研究发现，髓鞘丧失——长程神经投射绝缘鞘的丧失——是新冠后遗认知损害的一种机制。
- 髓鞘丧失会损害脑区间通信的速度和可靠性，与长新冠患者广泛报告的”脑雾”症状相符。
- 这些影响可能具有高度的个体差异性，取决于神经炎症集中于何处。
相关概念
- schizophrenia
- bipolar disorder
- depression
- anorexia nervosa
- autism spectrum disorder
- optogenetics
- unconscious mind
- psychoanalysis
- schizotypal personality disorder
- my
English Original 英文原文
Depression, Schizophrenia, and the Neuroscience of the Mind
Summary
Karl Deisseroth, psychiatrist and bioengineering professor at Stanford, explores the intersection of psychiatry, neuroscience, and human emotion — from the biological underpinnings of mental disorders to the revolutionary technique of optogenetics. The conversation spans the spectrum of psychiatric illness, the unconscious mind, the origins of belief and self, and the future of brain science as a tool for understanding and treating mental disorders.
Key Takeaways
- Dysfunction reveals function: Just as a broken gene reveals what a gene does, psychiatric disorders expose the underlying architecture of normal human emotion and cognition.
- ~25% lifetime prevalence: Structured psychiatric interviews estimate roughly 1 in 4 people will meet criteria for a psychiatric disorder at some point in their lives; self-report numbers push this even higher.
- Mental disorders exist on a spectrum: Even severe, life-threatening conditions like bipolar disorder, schizophrenia, and anorexia nervosa grade continuously into near-normal function — there is no clean binary line.
- Bipolar disorder, autism, and anorexia are positively correlated with intelligence and educational attainment at the population level, despite causing serious suffering.
- Optogenetics enables causal neuroscience: By introducing light-sensitive proteins from algae into specific neurons, researchers can turn individual cells on or off with millisecond precision — revealing what actually causes behaviors, not just correlates.
- No single origin point for decisions: Recording from neurons across the entire brain suggests that choices and actions arise simultaneously across distributed regions, not from one identifiable source.
- The sense of self is separable from the body: Activity in the retrosplenial cortex can dissociate a subject’s experience of a stimulus from their emotional response to it — a neural basis for experiences described in meditation and psychedelic states.
- Post-COVID neurological effects may involve loss of myelin (the insulating sheath on long-range neural projections), explaining cognitive fog and altered function in many patients.
- The unconscious mind remains scientifically valuable even if Freudian categories (id, ego, superego) don’t cleanly map onto neurobiology.
- Optogenetic therapy in humans has begun: A blind patient partially recovered vision after optogenetic gene delivery to the retina, published in Nature Medicine (Roska et al.).
Detailed Notes
Psychiatry: Disorder, Spectrum, and Diagnosis
- Deisseroth prefers the term “disorder” over “disease” or “dysfunction” as the most inclusive and honest framing — it captures when things are not working, without over-pathologizing.
- Psychiatric diagnosis currently lacks objective biomarkers: no blood draws, no imaging studies capable of confirming a diagnosis. This contrasts sharply with other medical specialties.
- The clinical threshold for disorder requires disruption in social or occupational functioning, not just subjective distress.
- Rigorous prevalence studies use structured psychiatric interviews conducted by trained clinicians — more reliable than self-report surveys, which tend to yield inflated numbers.
The Genetics and Biology of Mental Illness
- Disorders like bipolar disorder, autism, and anorexia nervosa are heavily genetic and associated at the population level with higher intelligence and educational attainment — a paradox that points to complex evolutionary trade-offs.
- Mental illness is “very biological” in nature, yet the lab tools to confirm this biologically in clinical practice do not yet exist.
- Schizophrenia runs in families; relatives may present with schizotypal personality disorder — magical thinking, unusual thought patterns — without full psychosis. This illustrates the continuous genetic spectrum of even the most severe disorders.
Psychoanalysis and the Unconscious
- Early psychiatry (Freud, Jung) pivoted away from microscopy toward verbal communication because the richness of human experience far exceeded what cells alone could explain at the time.
- Freud’s core contribution: taking the unconscious mind seriously as a domain that shapes behavior, dreams, and symptom formation.
- Key disagreement between Freud and Jung: Freud tied the unconscious almost entirely to libido; Jung argued the unconscious was a far broader, more complete parallel self encompassing the full range of human motivation — including the shadow.
- Modern neuroscience suggests the id/ego/superego framework may be an artificial categorization — all drives, including moral ones, may ultimately be variations of primal survival-linked impulses competing in a kind of distributed “town hall.”
- Psychoanalysis persists not primarily as a treatment but for its influence on art, literature, philosophy, and as a framework for insight into inner life.
Optogenetics: Principles and Progress
- Optogenetics uses microbial opsins — light-sensitive proteins derived from single-celled algae (first described by botanist Andrei Famintsyn in 1866) — inserted into specific neurons via genetic delivery.
- Because neurons in the deep brain do not normally respond to light, any introduced light sensitivity provides an extremely clean signal above noise.
- Timeline of development:
- 2005: First demonstrated in cultured neurons (in a dish)
- 2007: Working in behaving mice; fiber optic delivery methods developed
- 2009: Versatile, applicable to essentially any cell type
- 2012: Single-cell resolution targeting achieved
- 2019: 20–50 individually specified single cells controlled simultaneously; mice made to perceive a visual stimulus that wasn’t present
- 2022: Hundreds of individually specified single cells controlled across all of visual cortex
- Light scatters in brain tissue (at lipid-water interfaces), limiting depth penetration — addressed through infrared wavelengths, two-photon/three-photon methods, fiber optics, and 3D holographic projection.
- First human optogenetic therapy: Botond Roska (Switzerland) restored partial vision in a blind patient with retinal degeneration, published in Nature Medicine (~2021). The patient could reach for objects on a table using the treated eye.
Optogenetics and Psychiatric Research
- Deisseroth frames optogenetics primarily as a discovery tool rather than a direct clinical therapy — the goal is to identify the causal cells underlying specific symptoms (loss of motivation, anhedonia, sleep disruption, altered energy).
- Once causal cell populations are identified, medications, brain stimulation therapies, and diagnostic tools can be designed with much greater precision.
- Combined opto-electric recording (optical stimulation + electrical recording) provides two independent, complementary data streams for whole-brain analysis.
The Neuroscience of Self, Belief, and Consciousness
- Temporal lobe activity is implicated in experiences of religiosity — patients with temporal lobe epilepsy often report spiritual auras during seizures.
- The retrosplenial cortex contains circuits that bind the sense of self to the sense of the body. Deisseroth’s lab showed in mice that inducing an abnormal rhythm in this region dissociates stimulus detection from emotional response to that stimulus — a potential neural model of depersonalization, meditative detachment, and psychedelic states.
- Whole-brain recording during altered states (e.g., psychedelics like DMT and 5-MeO-DMT) is now technically accessible, offering a path to cellular-resolution understanding of these experiences.
- Decisions appear to arise simultaneously and broadly across cortex, striatum, and thalamus — no single “free will neuron” or origin region has been identified.
Post-COVID Neurology
- Research by Deisseroth’s wife Michelle Monje (Stanford) and Akiko Iwasaki (Yale) has found loss of myelin — the insulating sheath on long-range neural projections — as a mechanism of post-COVID cognitive impairment.
- Myelin loss impairs the speed and reliability of communication between brain regions, consistent with the “brain fog” widely reported in long COVID patients.
- Effects may be highly idiosyncratic depending on where neuroinflammation is concentrated.
Mentioned Concepts
- schizophrenia
- bipolar disorder
- depression
- anorexia nervosa
- autism spectrum disorder
- optogenetics
- unconscious mind
- psychoanalysis
- schizotypal personality disorder
- my