Why is my concussion MRI or CT normal if I still have symptoms?

Concussion is a functional injury — it disrupts how brain networks communicate rather than causing the structural damage standard imaging detects. Normal scans are common and don't mean symptoms aren't real.

Is rest really the best treatment for concussion?

Brief initial rest helps, but prolonged rest is no longer considered ideal for lingering symptoms. Active, targeted rehabilitation of the affected systems is increasingly the standard for persistent cases.

How long do concussion symptoms last?

Many people recover within weeks, but a meaningful minority experience persistent symptoms. When symptoms linger, a functional assessment of the visual, vestibular, and autonomic systems can guide effective rehabilitation.

Concussion & Brain Injury

An injury to the brain from a blow or jolt that disrupts how brain networks communicate — producing symptoms that can linger long after standard imaging reads as normal.

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The CHallenge

Why Concussion & Brain Injury is so often misunderstood

After a concussion, patients are often told to rest and wait, with the assumption that symptoms will resolve on their own. For many they do — but for a significant minority, symptoms persist, and the "watch and wait" model offers little once they do. Because routine CT and MRI typically appear normal in concussion, lingering problems are easily dismissed even as they disrupt daily life and work.

Also known as

TBI, traumatic brain injury, head injury, mTBI, mild traumatic brain injury, closed head injury, post-concussion, PCS

ICD-10

S06 (Intracranial injury), F07.81 (Postconcussional syndrome), S09.90 (Head injury unspecified)

The Opportunity

How focused education closes the gap

Clinicians trained in functional assessment learn to identify and address what standard screening overlooks — building the skill set patients in this position genuinely need.

Clinicians trained in functional neurology rehabilitation can assess and address the functional disruption a concussion leaves behind.- Assess visual, vestibular, autonomic, and cognitive systems affected by injury- Identify the specific networks driving a person's persistent symptoms- Translate findings into a targeted, active rehabilitation plan

Education for Concussion & Brain Injury

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Multi-Format

On-Demand

Evaluation of the Intangible Effects of Concussion

Learn to assess the “invisible” effects of concussion—mental status, sleep, autonomics, HRQoL, affect, and symptom burden—in this online module with practical outcome tools and evidence-backed strategies.

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42.50

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42.50

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hours

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Oculomotor Rehab After Concussion

Advance your concussion care with the latest research on oculomotor rehab, visual recovery metrics, and VR-based rehabilitation protocols

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42.50

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42.50

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Post-Concussion Rehabilitation

Move beyond symptom management. Gain an RCT-supported framework for rehabilitating persistent post-concussion syndrome rooted in functional neurology.

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45.00

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45.00

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Functional Neurology

Matthew Antonucci | Kenneth Jay

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Sensory Integrative Therapies, Orthoptic Exercises, and Layering Cognitive Function Therapies

Learn to integrate sensory, orthoptic, and cognitive rehab strategies for concussion care. Improve outcomes in oculomotor control, attention, memory, and sensory processing.

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47.50

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47.50

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hours

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The Cognitive Neuroscience of Concussion

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Vestibular Rehab Post-mTBI Research

Comprehensive scoping review of vestibular and oculomotor rehabilitation interventions for mTBI patients with evidence-based outcomes and assessment tools.

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hours

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VR in Concussion Rehabilitation

Master the clinical application of VR in concussion care through evidence-based evaluation, patient selection criteria, and practical implementation.

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hours

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The Therapeutic Effects and Clinical Applications of Molecular Hydrogen for Neurological Health

A 1-credit exploratory course examining molecular hydrogen’s neuroprotective mechanisms, redox regulation, nitric oxide synergy, and emerging clinical applications in neurological health.

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42.50

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42.50

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Human Performance & Regenerative Medicine

Understanding Concussion & Brain Injury

What it is

Concussion — a form of mild traumatic brain injury — results from a blow or jolt that causes the brain to move rapidly within the skull, disrupting normal neuronal function. Brain injury more broadly spans a range of severity, but even "mild" injuries can produce meaningful, lasting symptoms. Concussions are common in sports, falls, and motor-vehicle collisions, and their effects are frequently underestimated. Crucially, concussion is a functional injury: it alters how brain networks communicate rather than producing the structural damage that standard CT and MRI detect. This is why so many patients with persistent symptoms are told their imaging is "clear," and why a functional neurology assessment — one that evaluates how the visual, vestibular, autonomic, and cognitive systems are actually performing — is often what's needed. Rehabilitating the injury at the level it actually occurred, rather than waiting passively, is what gives those with lingering symptoms a genuine path back to function. Identifying exactly which systems are affected is what turns a frustrating, open-ended recovery into a targeted, active rehabilitation plan.

Symptoms & presentation

Concussion symptoms can appear immediately or emerge over days, and may persist:- Headache, pressure, or a feeling of fogginess- Dizziness, imbalance, or visual disturbance- Light and noise sensitivity- Difficulty concentrating or slowed thinking- Sleep disruption and unusual fatigue- Irritability, anxiety, or mood changes

Why it's clinically complex

A concussion disrupts the brain at a functional level — altering energy metabolism, neurotransmitter signaling, and the coordination between networks such as the visual, vestibular, and autonomic systems. These changes don't typically show up as structural damage on routine imaging, yet they can produce wide-ranging, persistent symptoms. That's the core of the diagnostic gap: standard scans look for bleeding or structural lesions, not the network dysfunction that actually drives the symptoms. When symptoms persist, a functional neurology assessment of how these systems are performing — and an active rehabilitation plan that retrains them rather than waiting passively — addresses the injury at the level it actually occurred.

Common Questions

What to expect

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