Post-Concussion Syndrome (PCS)
​Definition:
Post-Concussion Syndrome is a set of physical, cognitive, emotional, and sleep-related symptoms that persist weeks to months (and sometimes years) after a mild traumatic brain injury (concussion).
Causes:
  • Concussions disrupt normal brain function due to biomechanical forces.
  • Ongoing symptoms may result from:
    • Microstructural brain changes (not always visible on scans).
    • Altered neurotransmitter activity.
    • Reduced cerebral blood flow.
    • Psychological factors (anxiety, depression, PTSD).
Common Symptoms:
  • Cognitive: memory problems, poor concentration, slowed processing.
  • Physical: headaches, dizziness, sensitivity to light/noise, fatigue.
  • Emotional: irritability, anxiety, depression, mood swings.
  • Sleep: insomnia, fragmented sleep, non-restorative rest.
Clinical Course:
Most people recover within weeks, but about 10–15% develop PCS lasting longer than 3 months.
Permanent Vestibular Issues
​Definition:
Vestibular dysfunction occurs when the inner ear balance organs or their neural pathways are damaged, leading to persistent problems with balance, spatial orientation, and motion perception.
Causes (after concussion):
  • Direct injury to the inner ear (labyrinth, semicircular canals, otolith organs).
  • Damage to vestibular nerves.
  • Central processing changes in the brainstem/cerebellum.
Common Symptoms:
  • Vertigo: spinning sensation, especially with head movement.
  • Dizziness & lightheadedness: constant or episodic.
  • Imbalance: difficulty walking, unsteadiness on uneven ground or in the dark.
  • Motion sensitivity: discomfort in cars, busy environments, or scrolling screens.
  • Visual-vestibular mismatch: blurred vision, difficulty focusing, “bouncing” vision when walking.
Impact:
Vestibular problems can become chronic or permanent, especially if there is irreversible inner ear damage. Patients often adapt through compensation strategies, vestibular rehabilitation therapy, or lifestyle modifications.
Key Differences
  • PCS: A syndrome of prolonged concussion-related symptoms (multi-system).
  • Permanent Vestibular Issues: A specific, chronic dysfunction of the balance system, sometimes as a residual effect of PCS or inner ear trauma.

Treatment & Management
  • PCS: Cognitive rest (initially), gradual return to activity, cognitive rehab, headache management, psychotherapy (for mood/anxiety).
  • Vestibular Issues: Vestibular rehabilitation therapy (VRT), balance training, vision therapy, medications for vertigo, lifestyle pacing, and environmental adaptations.
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Mark Zauss, LMHC, LPC, CCMHC, NBCC, BC-TMC, ADHD-CCSP, C-DBT, CCTP

Understanding Post-Concussion Syndrome & Vestibular (Balance) Problems

Simple guide with visuals to explain why symptoms happen and what can help.

1) What is Post-Concussion Syndrome (PCS)?

Attention Vision

PCS is a group of symptoms that can last weeks or months after a concussion.

  • Thinking: memory, focus, or speed issues.
  • Physical: headaches, dizziness, fatigue, light/noise sensitivity.
  • Mood: anxiety, irritability, or low mood.
  • Sleep: trouble falling/staying asleep, not rested.

Why: the brain’s signals are “out of rhythm” while healing. Scans may look normal even when symptoms are real.

2) What are Vestibular (Balance) Problems?

Vestibule

When the inner ear or its nerves are injured, balance and motion signals can be inaccurate.

  • Dizziness/vertigo (spinning or rocking feelings).
  • Imbalance—hard to walk straight or climb stairs.
  • Motion sensitivity in cars, stores, or scrolling screens.
  • Visual-vestibular issues: blurry or “bouncy” vision when moving.

These problems can improve with therapy; some people adapt with strategies.

3) PCS vs. Vestibular Problems—What’s the Difference?

PCS

  • Involves thinking, mood, sleep, physical symptoms.
  • Appears after concussion/head injury.
  • Often improves gradually with treatment.

Vestibular

  • Specific inner-ear/balance problem.
  • Causes dizziness, vertigo, motion sensitivity.
  • Improves with vestibular therapy and adaptation.

4) What Can Help?

For PCS

  • Gradual return to activity; pacing.
  • Cognitive/vision therapy as needed.
  • Headache management and sleep hygiene.
  • Stress reduction and counseling.

For Vestibular Issues

  • Vestibular rehabilitation therapy (VRT).
  • Balance and gaze-stabilization exercises.
  • Gradual exposure to motion/visual triggers.
  • Adaptation strategies to reduce limitations.
This handout is for educational purposes only and not a diagnosis. Please discuss your symptoms and treatment options with your clinician.