PSAST: Pelvis-Stabilized Axial Spinal Traction

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What is PSAST?

Pelvis-Stabilized Axial Spinal Traction (PSAST) is a specialized, linear spinal decompression technique. By stabilizing the pelvis, we apply a controlled, longitudinal force along the body's vertical axis — from the crown of the head to the tailbone.

Unlike traditional traction methods, PSAST is non-rotational: it avoids twisting or torquing the cervical spine. This stabilization maintains uniform decompression along the entire spinal axis.

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The Science Behind PSAST

Our approach is informed by ongoing clinical research into the relationship between spinal mechanics and neurological health, including two of Dr. Chen's published papers:

1. Sustained Bulbar and Respiratory Function
A 21-month case report documented axial spinal traction in a patient with bulbar-onset ALS, observing sustained respiratory and bulbar (speech and swallowing) function over the study period. As a single case report, this is a preliminary finding rather than established evidence for treatment — but it points to a promising area for further study.
Read the paper →

2. Axial Spinal Traction and Glymphatic Circulation
A biomechanical technical report proposes axial traction as a potential modulator of the glymphatic system — the brain's fluid-based waste-clearance pathway — by influencing cerebrospinal fluid (CSF) circulation.
Read the paper →

Dr. Chen has published additional papers extending this research to other neurodegenerative conditions. See the full list of publications → 

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Potential Benefits

• Neuro-supportive: May support spinal function and fluid circulation, an area of particular interest in conditions like ALS

• Glymphatic support: Proposed to assist CSF movement as part of the brain's natural clearance process

• Axial decompression: Pelvic stabilization is designed to increase intervertebral disc space and reduce nerve root compression more effectively than non-stabilized traction

• Symptom relief: May help ease chronic headaches, neck stiffness, and upper back tension

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Is PSAST Safe?

When performed by a trained doctor, PSAST is safe and closely controlled. We use specialized equipment — including a precision cervical harness, stabilizing pads, and pelvic anchors — to maintain correct spinal alignment throughout. The force is calibrated to your specific condition, and your response is monitored throughout the session.

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What Does It Feel Like?

During treatment: You may hear a "pop" or "click," a natural release of joint pressure. Many patients describe a feeling of elongation or lightness through the spine.

After treatment, deep relaxation is common, sometimes accompanied by a temporary "heavy" feeling in the limbs — a sign that the nervous system is shifting into a restorative state.

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Addressing Your Concerns

Nervous about your first session? That's completely normal. We use a graduated loading protocol, starting with a very light force so you can experience the movement gradually and comfortably.

Who should consult a doctor first? A clinical evaluation is required before treatment for anyone with:

• Severe osteoporosis

• Recent spinal surgery or acute traumatic injury

• Uncontrolled hypertension

• Certain central nervous system disorders (we'll review your history during consultation)

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Evidence-Based Care

We believe in transparent, scientifically grounded care. You're welcome to review the research behind our approach:

• Sustained Bulbar and Respiratory Function in a Case Most Consistent With Bulbar-Onset ALS Following Axial Spinal Traction: A 21-Month Report

• Axial Spinal Traction as a Potential Modulator of Cerebrospinal and Glymphatic Circulation in Neurodegenerative Diseases