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블로그 2026년 4월 21일

Why the Autonomic Nervous System Shakes the Whole Body — When a Single Control Panel Collapses

Dr. Dr. Heo Ji-young, Director of Kyunghee Meerae Korean Medicine Clinic, Gwangjin
의료 감수 Dr. Heo Ji-young Representative Director · KMD

You can't sleep, your chest is pounding, your digestion is off, and your hands and feet are cold — you have probably wondered why so many places feel bad at the same time.

Because the symptoms are all different, they look like separate illnesses, but I see this as the result of a single control panel being thrown off balance. That control panel is the autonomic nervous system. In this article I will explain, with a diagram, why the autonomic nervous system shakes the whole body at once, and how that shapes the way I approach treatment.

The autonomic nervous system is the body's "control panel"

Even without our being aware of it, the autonomic nervous system coordinates the heartbeat, digestion, sleep, body temperature, and blood pressure around the clock. It is broadly made of two axes.

  • The sympathetic nerve — in charge of activity and tension (the accelerator)
  • The parasympathetic nerve — in charge of rest and recovery (the brake)

A healthy body keeps these two rising and falling as the situation demands, maintaining balance.

Autonomic balance seesaw — when the sympathetic side stays dominant too long: insomnia, palpitations, indigestion, cold hands and feet

When it tips to one side, the whole body is shaken

The problem comes when this balance tips to one side for too long. When stress, overwork, and irregular rhythms continue, the sympathetic nerve (the accelerator) stays pressed down. Then, from a single cause, several symptoms break out at once.

  • Because the brake doesn't engage at night, sleep stays shallow,
  • because the heart stays aroused, it pounds,
  • because blood flow to the digestive organs drops, the stomach feels uncomfortable,
  • and because the peripheral vessels tighten, the hands and feet turn cold.

On the surface it looks like four different illnesses, but the root is one. That is why pressing each symptom down separately with medication doesn't heal it well.

So I aim at "balance"

Rather than chasing each symptom one by one, I design treatment in the direction of restoring the disturbed control panel itself.

  • Acupuncture approaches in a direction that lowers the overly switched-on sympathetic nerve and revives the parasympathetic nerve.
  • Herbal medicine replenishes the depleted regulating capacity, and is composed to match that person's main symptom pattern (sleep type, cardiovascular type, digestive type).
  • In daily life, we adjust together the factors that directly affect the autonomic nervous system — sleep rhythm, breathing, and caffeine.

Finally

Of course, palpitations can come from a heart condition, and dizziness from anemia or a thyroid problem. That is why, when needed, I first recommend such tests. But if the tests show no abnormality and yet several symptoms continue together, we need to look together at the possibility that a problem of autonomic balance lies at the root. That symptoms can differ while the root is one — that is my starting point in looking at the autonomic nervous system.

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Dr. Dr. Heo Ji-young, Director of Kyunghee Meerae Korean Medicine Clinic, Gwangjin

Dr. Heo Ji-young Representative Director · KMD

A graduate of the College of Korean Medicine at Kyung Hee University, with master's and doctoral degrees in pathology — the mechanisms of disease — from its graduate school. Later served as a research professor in the university's Herbology department, studying medicinal substances. Studying both disease and medicine from both sides is the foundation of this practice: explaining "why a given medicine works for a given illness" in the language of both pathology and pharmacology. Explains autonomic, chronic, and intractable conditions — and structural problems of the body — in the language of modern science, and proposes treatment matched to the cause. Has taught prescribing and clinical practice to Korean medicine doctors for over ten years, and is a co-author of "Korean Medicine, Explained by Korean Medicine Doctors," selected for the 2018 Sejong Books list (general category).

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