Cranial Adjusting After Concussion and Traumatic Brain Injury: What Nobody Told You

The standard approach to concussion goes something like this: rest, avoid screens, return to activity gradually, see a neurologist if symptoms persist. For many people, this protocol works. Symptoms resolve over a few weeks and life returns to normal.

But for a significant portion of concussion patients — estimates range from 15 to 30 percent — symptoms don't resolve. Months pass. Sometimes years. The headaches remain. The brain fog persists. Sleep is disrupted. Noise and light sensitivity continue. The MRI is normal. The neurologist has no additional answers.

This is post-concussion syndrome, and one of its most consistently overlooked contributing factors is the state of the cranial bones themselves. The brain gets evaluated after a head injury. The bony structure housing it rarely does.

What Happens to the Cranial Bones in a Concussion

A concussion is a traumatic acceleration-deceleration of the brain within the skull. The forces involved are significant enough to cause neurological disruption — altered neurotransmitter release, axonal stretching, metabolic changes in brain tissue.

But those same forces act on the cranial bones. The skull is not a solid helmet (I wrote about this in detail in a previous post) — it's a collection of bones joined at sutures, designed to flex and adapt to forces. When the force of a head impact exceeds the ability of the cranial mechanism to absorb and distribute it, the bones can shift into positions that restrict normal cranial motion.

The most commonly affected structures in concussion are the occiput (often impacted directly), the temporal bones (which frequently torque due to shear forces), the sphenoid (which may compress or torque through the cranial base), and the frontal bone (in frontal impacts). Each of these bones, when displaced, can impair the function of the structures adjacent to them: cranial nerves, venous sinuses, the jugular foramen, and the flow of cerebrospinal fluid.

Post-Concussion Syndrome and the Structural Connection

When someone has a normal MRI six months after a concussion but still has daily headaches, it's tempting to conclude that their problem is purely neurochemical or psychological. The imaging is clear, so the structure must be fine.

But standard MRI does not evaluate cranial bone position or sutural motion. It's a soft tissue study. A displaced temporal bone or a restricted sphenoid won't show up on an MRI. Neither will impaired CSF flow at the level of the cranial sutures.

Here's what cranial restriction does that can perpetuate post-concussion symptoms:

It impairs CSF flow. The cerebrospinal fluid that nourishes the brain and removes metabolic waste depends on the cranial rhythmic impulse — the subtle motion of the cranial bones — to circulate properly. Restricted cranial bones create hydraulic stagnation. The brain's recovery is slowed because its own support system is compromised.

It creates meningeal tension. The dural membranes attach to the inner surface of the cranial bones. When bones are displaced, the dura is stretched unevenly. This creates a pattern of meningeal tension that can persist as chronic headache, pressure behind the eyes, and neck stiffness.

It compresses cranial nerves. Several cranial nerves exit through foramina in the skull that are bordered by multiple cranial bones. When those bones are displaced, the foramina narrow slightly. The vagus nerve, the facial nerve, and the vestibulocochlear nerve (which governs balance and hearing) are particularly vulnerable. Vagal compression can contribute to nausea, digestive upset, and heart rate variability issues that are common but poorly understood in post-concussion patients.

How SOT Craniopathy Assesses Post-Concussion Patients

My assessment of a post-concussion patient begins with palpation of the cranial rhythmic impulse — the quality, symmetry, and rhythm of cranial motion. In a healthy nervous system, the CRI is smooth, bilateral, and regular. After a head injury, the CRI is frequently asymmetric, diminished in amplitude, or completely absent in specific regions.

I then assess each cranial bone individually: its position relative to its neighbors, its mobility, and whether the sutures around it are freely moving or restricted. In a typical post-concussion patient, I'll find two to four bones with significant restriction — and often one dominant lesion that is driving the whole pattern.

The treatment is specific, gentle, and cumulative. I'm not applying force to the skull — I'm applying precise, light vectors that encourage the cranial bones to resume their normal motion. The forces are measured in grams. Sessions are typically 30-45 minutes, and most patients begin to notice changes within three to five visits.

The Cumulative Concussion Problem

This issue becomes significantly more complex in athletes, military veterans, and anyone who has sustained multiple head injuries. Each successive concussion adds to the cranial bone displacement pattern of the previous one. Over time, what might have been a manageable restriction from one concussion becomes a complex, layered distortion involving multiple bones in multiple planes.

I see this regularly with former athletes and with veterans who were exposed to blast injuries or close-quarters training accidents. They often carry a history of "five or six concussions" with the matter-of-fact tone of someone who was told that was just part of the sport or the job. Nobody ever assessed their skulls. Nobody ever explained that the bones housing their brain were still carrying the mechanical signature of those injuries.

It's not too late to address these patterns. The cranial mechanism responds to treatment at any age, though recovery is generally slower with multiple accumulated injuries than with a single acute event.

What to Expect in Recovery

For a single uncomplicated concussion that has gone several months without resolution, I typically see meaningful improvement in headache frequency and intensity, sleep quality, and cognitive clarity within four to eight sessions. For patients with more complex histories — multiple concussions, longer duration of symptoms, or associated cervical spine injury — recovery takes longer and may benefit from a multidisciplinary approach that includes neurology, physical therapy, and vestibular rehabilitation alongside cranial chiropractic.

My role in the process is the structural one: restoring normal cranial bone mechanics so the nervous system has the mechanical and hydraulic support it needs to complete its own healing process.

Key Takeaways

• Concussion forces act on the cranial bones as well as the brain. Displaced cranial bones are a common finding in post-concussion syndrome that standard imaging does not detect.
• Cranial restriction after concussion impairs CSF flow, creates meningeal tension, and can compress cranial nerve foramina — all of which perpetuate post-concussion symptoms.
• Assessment involves palpation of the cranial rhythmic impulse and individual cranial bone evaluation, not imaging.
• Treatment is gentle, specific, and typically produces noticeable improvement within four to eight sessions for uncomplicated post-concussion cases.
• Multiple cumulative concussions create layered patterns of cranial restriction that require more extended care.

If you or someone you care about has been suffering from post-concussion symptoms with no end in sight, cranial assessment may provide answers that imaging hasn't. Call Pura Vida Chiropractic at (210) 685-1994 to schedule an evaluation with Dr. Dan Foss. We are here for the San Antonio community in English and Spanish.