重塑脑回路:经颅磁刺激(TMS)如何将抑郁症患者带回彩色世界 TVO Today 2026-04-24

经颅磁刺激:利用物理磁场重拨大脑的“电信号”

经颅磁刺激(Transcranial Magnetic Stimulation: 简称 TMS,一种利用脉冲磁场改变大脑神经元放电模式的无创技术)是一种自 20 世纪 90 年代后期出现的治疗方法。其核心逻辑在于大脑是一个通过电信号进行通讯的器官——我们的思维、情感和专注力本质上都是电信号的传递。TMS 通过在头皮外侧施加磁场,精确靶向涉及情绪调节和认知功能的脑区,从而改变大脑的放电方式。虽然我们无法用肉眼实时观察这种变化,但通过脑扫描仪(Brain Scanner)可以清晰地看到磁场脉冲对大脑活动的即时影响。这种疗法为那些长期深陷抑郁泥潭、对传统手段产生耐药性的患者提供了一个源自物理学层面的新出口。

Original English Source

It's called TMS. That's transcranial magnetic stimulation. Folks, often with these very difficult to treat depressions, will come into a treatment room in this building. A device will be hooked up to their heads and they will be bombarded with magnetic waves in a certain area of their brain that can release them from the clutches of depression.

TMS, transcranial magnetic stimulation. What is it? Transranial magnetic stimulation. It's a treatment that's been around since the late 1990s. It's a way of stimulating the brain using electrical and magnetic stimulation. So our brains communicate through electricity and a magnetic field can cause changes in electrical signals. So our body communicates on electrical signals. Our heart pumps on electrical signals and our brain thoughts and feelings are really electrical signals. So what transcranial magnetic stimulation does is change the way that the brain is firing and and it specifically targets the areas involved in emotions and thinking and concentration and it works by changing how the brain is firing and you can see that real time while you're doing it. We we can't see it in real time but if you put someone in a brain scanner you could actually see what happens to the brain when you deliver a magnetic field pulse to the brain.

个性化校准:以“运动阈值”作为大脑兴奋性的量尺

每个人的大脑对磁场的反应程度各不相同,因此 TMS 是一种高度个性化的治疗(Personalized Treatment)。在正式治疗前,医生会通过测试运动阈值(Motor Threshold: 诱发肌肉产生最小收缩所需的磁场强度)来校准机器。具体的做法是将磁线圈放置在患者的运动皮层(Motor Cortex: 大脑中控制身体运动的区域)上方,通过观察患者手部肌肉的抽动(如食指或拇指的跳动)来确定该个体的大脑兴奋水平。这种“提线木偶”般的互动虽然看起来神奇,但它确保了后续治疗脉冲的强度既能达到治疗效果,又处于安全范围。一旦确定了阈值,医生就能根据特定的波动模式(如频率高达 50Hz 的爆发式磁脉冲 Theta Burst Stimulation)进行正式的抗抑郁治疗,整个过程精准且通常无痛。

Original English Source

When someone comes in for treatment, and this treatment is a personalized treatment, even at its most basic form, we we deliver the stimulation based on how someone's brain reacts to the magnetic field pulses. So every brain is different and everyone's brain is different and and each person has a certain level that it will react to the magnetic stimulation. So we first come in and we deliver magnetic field pulses to the area of the brain that controls motor movements, hand movements specifically.

Someone sits in a chair and we put the magnetic coil over the motor cortex. And we cause the hand muscles to move. So this is the way I was telling you how we understand each individual person's brain excitability levels. So what I'm going to do is I'm just going to stimulate the the area that of your brain that controls your your right hand. So you have a relatively low motor threshold. So you see you're like you're like puppeting me. Whoa. You're doing different fingers now. Correct. So it's and really what we want to get are, you know, any muscles within the hand. but it is very precise. So we we can cause the muscle that controls the the thumb or we can cause the muscles that control the the finger muscles.

After they test your motor sensitivity, they now know how powerful to make the different pattern of waves for the actual TMS therapy. That's the sound of typical treatments. That's what's called theta burst stimulation. So in there there are bursts of pulses that are being delivered at a So the bursts are being delivered about 50 Hz. And in between them that there's triplets which are at five hertz. So that five hertz is the theta frequency and the 50 Hz is the gamma frequency. So you're kind of like a DJ like you're hitting like like different parts to sort of hit the waves just right in synchronicity. Correct. It's it we're kind of tuning. To get the response. Exactly. We use this arm and the coil rests on your scalp. And a treatment typically takes about 3 minutes.

从灰色地带回归彩色:50% 的治愈希望与渐进式觉醒

对于那些尝试过药物疗法或言语治疗(Talk Therapy)均告失败的“难治性”患者,TMS 表现出了显著的疗效,约 50% 的患者会产生积极反应。这种转变往往是渐进式的,而非瞬间发生的“奇迹”。患者描述这种体验就像是笼罩在生活中的“抑郁乌云”正在散去,世界开始从灰阶色调回归到全彩光谱中,颜色变得更加鲜艳,内心重新燃起了动力。从神经生物学的角度看,这涉及到显著性网络(Salience Network: 负责筛选环境信息并分配注意力的神经网络)的重塑。在抑郁状态下,这一网络过度扩张,导致患者陷入病态的反刍思维(Rumination: 反复咀嚼消极思想、陷入思维死循环的心理状态)。TMS 的作用类似于反复敲击这个扩张的“负能量肿块”,使其缩小并让大脑回路重新回到健康、高效的运行轨道。

Original English Source

So TMS uh is in its most basic form about 50% of people will respond to the treatment and that's very important number because most of the people that come for TMS haven't responded to other treatments. You're getting the tougher cases. So we're getting people that haven't responded to talk therapy or to medications. The challenge that people experience is is the the lack of hope that they feel when other treatments haven't worked. And so when something does work, when something resonates and allows them to experience joy again, it's transformative. In general, people describe kind of the the cloud of the depression lifting to some extent. They're able to see colors and things seem brighter. So, there is a really transformative quality to this treatment, like they're stepping out of grayscale and into spectrum of color again.

What happens with TMS is more of a kind of gradual shift in the brain. And it's not kind of like a a linear straight line. What people experience is kind of a rapid shift in emotions over the course of multiple weeks. And then towards the end of it, that's when it all kind of sets in. It's not that instantaneous awakening but it's kind of a gradual awakening that people experience when the treatment works.

What's happening in the brain is that depression is kind of seeping into other areas of the brain, other ways of thinking. And so this, you know, big blob is kind of expanding within the brain. It's called the the the salience network. that salance network expands within the brain. So it's you know people obsessively ruminate on decisions. What the TMS does is it kind of shrinks that overexpanded circuit. It kind of puts it back into place and it kind of trains the brain to be stronger at resisting that encroaching negative circuitry. Correct. We're kind of tapping at that blob repeatedly, causing it to shrink.

神经塑性的“健身房”:安静自我与重连世界

抑郁症患者常伴有默认模式网络(Default Mode Network: 大脑静息状态下的自我意识网络)的过度活跃,表现为极端自省、过度关注自我过失以及对社交的恐惧。TMS 的治疗过程可以类比为大脑的“体能训练”:通过外加压力诱发神经塑性(Neuroplasticity: 大脑改变其结构和功能以适应新刺激的能力),使神经回路变得更强健,从而打破那些僵化的、如同“深陷车辙”的负面思维模式。当“自我”不再过度扩张,患者就能重新获得在音乐会中全身心投入、在日常活动中感受心流的能力。这种从“受困于头脑”到“回归世界”的转变,不仅需要 30 次左右的诊室治疗,更需要后续的心理辅导来巩固这种新的认知模式,帮助患者在脑部状态改善后重新建立与生活和人际关系的连接。

Original English Source

Is TMS allowing people to kind of essentially step outside of themselves and be back in the world? Yeah. I I I think the the self becomes kind of overexpanded. And and what we're doing is trying to make the self u or or make that kind of way of thinking more functional and kind of not be over focused on oneself and over concerned about everything. Allow people to experience life without being preoccupied with the the impacts of of what they've done or what they've said. You can be in the moment and experience that. That's how people experience pleasure. They they lose kind of their self-consciousness and experience the moment.

Like all of these treatments work on the principle of neuroplasticity. So by stimulating the brain, we cause the brain to take on a different way of operating. So the way I describe it is we make the brain stronger a and and essentially that's what we do when we're doing exercise training. We we stress the system and that makes the muscles stronger. Similarly in the brain when you stimulate it it it becomes stronger and that can get people out of these stuck states.

What I tell people is that receiving the treatment is one part there. It takes time to re-engage a and to you know part of it is becoming active again engaging in activities and that transition from being depressed to feeling better to re-engaging is a process. where does therapy fit in there? Psychotherapy. So you've kind of warmed up the brain. You made it more neuroplastic. feels like the perfect time to hand the baton off to a therapist. I think that that's absolutely a pathway towards staying well.

未来展望:时空维度的精准打击与多用途治疗潜力

未来的精神医疗正朝着超个性化方向迈进。目前的 TMS 主要是基于人群均值的回路位置进行“盲操”,而下一代技术将结合 fMRI(Functional Magnetic Resonance Imaging: 功能性磁振造影,用于实时监测脑部活动)和 EEG(Electroencephalography: 脑电图)来实现精准定位。研究人员致力于在“空间”和“时间”两个维度上捕捉动态的大脑活动:不仅要找准那个特定的神经节点,还要在脑电波动的特定相位点进行精准刺激,这有望将有效率从 50% 提升至 80% 以上。此外,由于抑郁回路与疼痛回路创伤回路(Trauma Circuitry)存在大量重叠,TMS 正在被拓展用于治疗 OCD、物质依赖甚至慢性疼痛。这种从“单一症状治疗”转向“基础神经回路调节”的范式转移,标志着精神医学正走出曾经的死胡同,迎来最具希望的时代。

Original English Source

What does further personalization look like in TMS? we're actually able to read what's happening in the brain and in real time deliver our magnetic field pulses to the brain waves that are occurring. And we know that when we stimulate matters. So we can get a more powerful response if we stimulate at a certain point in the wave. those kind of incremental improvements in precision causes more plasticity and are more powerful. And by understanding what's happening in each individual person's brain, we may be able to shift that 50% to let's say 75% or 80%.

We we need to catch the area both where it is and when it's actually moving. there are cheap tools what's called EEG is electromphilography. detect what happens when we deliver that TMS pulse. and um yeah, I I think that that we're we're kind of in a space that where we can understand the the each individual person's depression because you know depression is one thing but within a person the the circuitry can be different.

The circuitry of depression is highly connected to the circuitry of pain. the pain circuitry overlaps with the circuitry of depression and so there is potential that by understanding the circuitry of depression we can also impact and reduce pain. Absolutely. this treatment is approved for patients who have obsessive compulsive disorder. It it's approved for patients with substance use disorders. fascinating interesting work happening in the area of treating trauma with this treatment being able to activate the circuitry in of trauma and being able to deliver stimulation and and quieting down that trauma circuitry. there is tremendous potential for this treatment across disorders.

📌 文中提及的人物和组织

人物: Daniel Blumberger, Helen Mayberg

公司/组织: CAMH

关键字: neuroplasticity mental-health tms-therapy brain-mapping