Acupuncture, Explained Through Anatomy
Acupuncture has been practiced for thousands of years—but today, researchers are discovering just how connected it is to modern anatomy.
Far from being mysterious or purely energetic, acupuncture works by interacting with real structures in the body: nerves, connective tissue (fascia), and the pathways that help your brain and body communicate.

As researchers study acupuncture through the lens of anatomy, they’re finding that many traditional points line up with meaningful structures—like nerve branches, fascial layers, and pathways where nerves and vessels pass through. In other words, these points are located in places where your body is especially responsive to input.

It helps explain why acupuncture often brings a shift in how the body feels, moves, and responds—refining internal awareness and offering the conditions where relief or change can emerge.
Dr. Poney Chiang  is a leading voice in bridging traditional acupuncture with modern neuroscience. His work focuses on how acupuncture interacts with the fascia and nerves, using precise anatomical knowledge to guide treatment. By mapping acupuncture points to real neuroanatomical structures, Dr. Chiang offers a grounded, science-informed approach that integrates traditional wisdom with contemporary understanding.
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It’s Not Just Energy
Many acupuncture points are found at places where nerves interact with fascia—like where they exit toward the skin or pass through small openings in the bone.

These areas are highly sensitive. They're filled with nerve endings that help your brain track what’s happening in your body—things like pressure, position, movement, and tension. When these areas are stimulated with a needle, it can send a signal to the brain to:
  • Calm pain pathways
  • Adjust muscle tone
  • Improve blood & fluid flow
  • Increase awareness of an underused area
Researchers like Dr. Helene Langevin have shown that acupuncture points often appear at junctions between layers of connective tissue. These layers are incredibly responsive—not just mechanically, but neurologically. When a needle enters, it gently pulls on the fascia, which then interacts with nearby nerves, which can shift how the body moves, feels, and organizes itself.
The Responsive Nature of Fascia: How Dr. Helene Langevin’s research deepened our understanding of acupuncture
Fascia isn’t just a passive wrapping—it’s a living, responsive tissue that plays an active role in how we move, sense, and process pain.

Dr. Helene Langevin’s early research showed that when acupuncture needles are rotated, connective tissue actually winds around the needle—creating a stretch and local pull that can influence how nearby nerves respond. This reaction, known as “mechanical coupling,” suggests that fascia is more than structural—it participates in communication with the nervous system.
Connective tissue forming a “whorl” as it winds around a rotated acupuncture needle.
How the Body Responds to Needling
When a needle enters the body, it does more than just sit there—it communicates. That input creates a mechanical and sensory signal that the body can recognize and respond to.

Depending on where the needle is placed, the body might respond by:
  • Soothing an irritated nerve
  • Releasing tension in nearby fascia or muscles
  • Improving blood flow to the area
  • Or changing how pain is processed in the brain and spinal cord
This is known as neuromodulation—adjusting how the nervous system interprets and responds to signals. In the case of pain, acupuncture can help the body “turn down the volume” by activating deeper regulatory systems in the brain and spinal cord. This is one reason people often feel a shift not just in the area needled, but throughout the body.

Some researchers also suggest that acupuncture helps refresh the body’s “map” of itself in the brain. When tissue is tight, inflamed, or underused, the nervous system can lose track of it. Needling helps restore that sensory input, often leading to improved awareness, movement, and comfort.
A New Map of Traditional Points
Researchers like Dr. Poney Chiang have mapped acupuncture points onto the nervous system.  Key areas in Poney's model include:
  • Where nerves divide or branch out
  • Where nerves exit fascia to become more sensitive near the skin
  • At small openings in bones (foramina) where nerves pass through
  • Where nerves enter muscles (motor entry points)
  • Where muscles become tendons (where tension and load are sensed)
An illustration of the right shoulder blade showing how acupuncture points relate to the nerve that helps coordinate the rotator cuff muscles (suprascapular nerve).
A look at acupuncture points that align with a major sensory nerve in the face—the trigeminal nerve.  (Link to study).
(Photo source).

Inside the Layers: Nerves, Muscle, and Fascia

Greater Occipital Nerve
This illustration highlights the upper neck and suboccipital region, with a focus on the greater occipital nerve (in yellow). As this nerve travels toward the scalp, it may become irritated or compressed—especially in tension-prone areas near the base of the skull as it weaves between and exits muscle and fascia layers. This anatomical complexity underscores the importance of precise needling techniques. For example, acupuncture points like BL-9 lie along the nerve’s path, but their effects vary depending on depth and tissue contact. Shallow needling may influence superficial nerves or fascia, while deeper insertions can reach muscle layers, joint structures, or deeper nerve roots.​ (image source)
​Modern Anatomy Meets Traditional Practice
Some of Dr. Poney Chiang’s techniques are inspired by the same anatomical knowledge used in medical procedures like nerve blocks—where a small amount of medication is injected near a nerve to reduce pain. In acupuncture, we apply a similar concept: using a needle to interact with the connective tissue around a nerve and help the body regulate that area. But unlike nerve blocks, which involve thicker needles that deliver medication (a "wet" technique), acupuncture uses hair-thin, dry needles.

For example, certain acupuncture points—like SP-12 near the hip—lie close to the femoral nerve, a major nerve for the thigh that passes through layers of fascia. By needling near this area, we can influence the nerve’s environment and support how the body senses, regulates, and responds. This includes the vascular structures the nerve runs with, potentially adding an autonomic response.

This approach doesn’t rely on medication, but it draws from the same anatomical understanding—applied through the body’s own systems of feedback and adaptation.
The first image shows a nerve block, where medication is injected near the femoral nerve to reduce pain. In acupuncture, no medication is used—needles stimulate the surrounding fascia to support the body’s own regulation.
​The second image shows this location in the groin near the hip.
 (FN = Femoral Nerve) 
Image from: Tips for a femoral nerve block
Bringing It All Together
Understanding how acupuncture works through nerves and fascia helps make sense of why it can be so effective—especially when pain, tension, or internal imbalances don’t seem to have a clear cause.

It also helps explain why acupuncture often creates a sensation that’s hard to describe—like something deep inside is shifting, releasing, or reconnecting. That’s because the needle may be interacting with tissues that are rich in sensory input, or helping the nervous system tune in to areas it has lost touch with.

This modern anatomical perspective doesn’t replace traditional wisdom—it simply helps explain another dimension of why these points have been effective for so long.
Key Resource & Research: ​
Other Neuroanatomical Acupuncture Resources:
Compiled by Joe Liguori
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