HBOT & Traumatic Brain Injury — What the Research Shows · Oceanside, CA
TRAUMATIC BRAIN
INJURY DOESN'T
END AT IMPACT.
The initial injury is only the beginning. In the hours, days, and months after a TBI, a cascade of secondary damage — swelling, oxygen deprivation, neuroinflammation, and cell death — continues to unfold in the brain. Researchers are now investigating whether hyperbaric oxygen therapy can interrupt this cascade and support neurological recovery even years after injury. This page explores what the science currently shows.
This page is educational and informational. It does not claim that HBOT treats, cures, or prevents TBI or any other neurological condition. HBOT is not an FDA-approved treatment for traumatic brain injury. If you have experienced a TBI, please work with a qualified neurological healthcare team.
What the Research Shows
86%
Of chronic TBI patients achieved clinically significant cognitive improvement — Sagol Center1
4
Cognitive domains improved significantly — memory, attention, information processing, executive function2
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Rated PT Clinic — North County 2025
Understanding TBI
THE SECONDARY INJURY IS WHERE MOST OF THE DAMAGE HAPPENS.
Traumatic brain injury occurs when an external force disrupts normal brain function — from sports concussions to vehicle accidents to blast exposure. But the initial mechanical disruption is only part of the picture. In the hours and days following a TBI, a cascade of secondary processes causes additional neurological damage that can far exceed the primary injury.
This secondary cascade is driven by cerebral hypoxia (oxygen deprivation in injured brain tissue), neuroinflammation (immune activation within the brain), edema (swelling that increases intracranial pressure), and mitochondrial failure in neurons deprived of adequate energy. Together, these processes expand the zone of injury — killing cells that survived the initial impact.
The Four Drivers of Secondary TBI Damage
Cerebral hypoxia — injured brain tissue is oxygen-deprived, accelerating cell death
Neuroinflammation — immune activation amplifies damage beyond the initial injury site
Cerebral edema — swelling increases pressure and further restricts blood flow
Mitochondrial failure — neurons lose the energy needed to maintain function and survive
"86% of chronic TBI patients who underwent HBOT achieved clinically significant improvement in cognitive function — years after their original injury."
— Hadanny et al., Sagol Center for Hyperbaric Medicine, Tel Aviv University
Why Chronic TBI Is Difficult to Treat
THE BRAIN CAN STILL RECOVER YEARS AFTER INJURY — IF IT GETS THE RIGHT CONDITIONS.
One of the most significant shifts in TBI research is the recognition that the brain retains neuroplasticity — the capacity to reorganize and form new connections — long after the acute phase. This means recovery is possible years after injury, not just in the immediate aftermath. The limiting factor is creating the biological conditions that allow neuroplasticity to occur.
Chronic TBI patients often stabilize at a plateau that conventional rehabilitation cannot move. What researchers have identified is that many of these patients have areas of "dormant" neurons — cells that are injured and metabolically compromised but not dead — that may recover function if oxygen and repair support are restored.
What HBOT May Offer Chronic TBI Patients
Oxygen to dormant neurons — plasma-dissolved oxygen reaches hypoxic areas conventional circulation cannot
Reduced neuroinflammation — documented anti-inflammatory effects in neural tissue
Angiogenesis support — stimulation of new blood vessel formation in injured brain regions
Neuroplasticity activation — improved metabolic conditions enabling the brain to reorganize
The Sagol Center research finding — that 86% of chronic TBI patients improved cognitively following HBOT — is particularly significant because these were long-term patients, not acute cases. It suggests that the window for neurological recovery may be longer than previously assumed.
WANT TO KNOW IF HBOT IS RIGHT FOR YOU?
The Research Angle
WHAT HBOT DOES
THAT RESEARCHERS
ARE INVESTIGATING
THAT RESEARCHERS
ARE INVESTIGATING
HBOT delivers 100% oxygen under pressure — creating conditions that researchers believe may address several of the core biological mechanisms driving neurological damage and impaired recovery after TBI.
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Cerebral Oxygenation
Injured brain tissue is frequently hypoxic — deprived of the oxygen neurons need to survive and function. HBOT dissolves oxygen directly into plasma under pressure, bypassing hemoglobin and reaching areas of impaired circulation. Researchers are investigating whether restoring oxygen to hypoxic but surviving neurons can activate recovery in areas of the brain previously thought to be permanently compromised.
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Neuroinflammation Reduction
Neuroinflammation is a primary driver of secondary TBI damage — microglial activation and inflammatory cytokines continue to damage tissue for weeks after the initial injury. HBOT has documented anti-neuroinflammatory effects in multiple studies, including reductions in microglial activation and pro-inflammatory signaling in neural tissue. Reducing neuroinflammation may help limit the spread of secondary damage.
Angiogenesis
HBOT stimulates the formation of new blood vessels in hypoxic tissue — a process called angiogenesis. In TBI, damaged microvasculature restricts blood flow and oxygen delivery to injured regions. By promoting angiogenesis in these areas, HBOT may help restore the circulation that neurons need to recover metabolic function and re-engage neuroplastic processes.
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Mitochondrial Recovery in Neurons
Mitochondrial failure is central to neuronal death after TBI — neurons deprived of adequate energy production cannot maintain their membrane potential or perform the metabolic work of repair. HBOT's oxygen surge supports mitochondrial function in injured neurons, potentially rescuing cells that are metabolically compromised but not yet dead. This mechanism may explain why HBOT can produce cognitive improvements even years post-injury.
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Stem Cell Mobilization
Research at the University of Pennsylvania found HBOT increased circulating stem cells by 800%. In the context of TBI, mobilized stem cells may migrate to areas of brain injury and support neural repair processes. Researchers are investigating whether this mechanism contributes to the neurological improvements documented in HBOT-TBI trials, particularly in regions where tissue repair is still biologically possible.
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Neuroplasticity Activation
The brain retains the capacity to reorganize and form new connections — neuroplasticity — even in chronic TBI patients. But neuroplasticity requires adequate metabolic conditions: oxygen, energy, and a reduced inflammatory environment. By improving all three simultaneously, HBOT may create the conditions that allow neuroplastic reorganization to occur in patients who have plateaued on conventional rehabilitation.
Important Context
TBI is one of the most actively researched areas in HBOT science. The Sagol Center in Tel Aviv has conducted some of the most rigorous work, with brain imaging confirming objective metabolic changes alongside cognitive improvement. Most of the strongest evidence is in chronic TBI — patients who are years out from their injury. Acute TBI protocols are less established. HBOT is not an approved treatment for TBI outside of specific diving-related applications. Always work with a neurological care team.
The Clinical Evidence
WHAT THE STUDIES
HAVE FOUND
HAVE FOUND
TBI is one of the most actively researched areas in HBOT science. Here are three of the most significant findings — covering cognitive outcomes, brain imaging, and neurological recovery.
Sagol Center Study · Tel Aviv University
86% OF CHRONIC TBI PATIENTS ACHIEVED CLINICALLY SIGNIFICANT COGNITIVE IMPROVEMENT
Researchers at the Sagol Center for Hyperbaric Medicine at Tel Aviv University studied chronic TBI patients — individuals who were years out from their original injury and had plateaued on conventional rehabilitation. Following an HBOT protocol, 86% achieved clinically significant improvement in cognitive function, including memory, attention, and executive function.
The study was notable for documenting objective changes on brain SPECT imaging alongside the cognitive improvements — confirming that the observed improvements corresponded to measurable changes in brain metabolism, not just subjective reporting. The finding that chronic patients — not just acute cases — could achieve meaningful recovery has been widely cited in TBI research circles.
Source: Hadanny et al., Sagol Center for Hyperbaric Medicine, Tel Aviv University.
RCT · PLOS ONE 2013
SIGNIFICANT IMPROVEMENTS ACROSS ALL 4 COGNITIVE DOMAINS IN RANDOMIZED CONTROLLED TRIAL
A randomized controlled trial by Boussi-Gross et al. published in PLOS ONE (2013) enrolled chronic mild TBI patients in a crossover design — allowing each patient to serve as their own control. The study measured cognitive function across four domains: memory, attention, information processing speed, and executive function.
Results showed significant improvements across all four cognitive domains in the HBOT condition. Brain SPECT imaging confirmed increased activity in previously hypoactive regions — directly linking the cognitive improvements to measurable neurological changes. The crossover design strengthened the causal interpretation, and the imaging data was particularly compelling to researchers who had questioned whether HBOT effects were placebo-driven.
Source: Boussi-Gross et al., PLOS ONE, 2013. DOI: 10.1371/journal.pone.0079995
Mechanistic Research · American Journal of Physiology 2006
800% STEM CELL INCREASE — REPAIR CELLS THAT MIGRATE TO BRAIN INJURY SITES
Dr. Stephen Thom's research at the University of Pennsylvania documented an 800% increase in circulating CD34+ stem cells following HBOT, and confirmed these cells homed specifically to sites of tissue injury. In TBI, this mechanism is directly relevant: stem cells migrating to brain injury sites may support neural repair, angiogenesis, and the replacement of damaged support cells.
Researchers are investigating whether the combination of HBOT's direct oxygenation effects and this stem cell mobilization creates an environment in injured brain tissue that allows both surviving neurons to recover function and support cells to rebuild the infrastructure needed for neuroplasticity. This dual mechanism may explain the magnitude of improvements observed in some HBOT-TBI trials.
Source: Thom et al., American Journal of Physiology, 2006. DOI: 10.1152/ajpheart.00306.2006
The Broader Research Context
TBI is one of the areas where HBOT research has produced some of its most compelling findings — particularly because the brain imaging data provides objective confirmation of the cognitive improvements. The Sagol Center has conducted more rigorous HBOT-TBI research than any other institution worldwide, and their findings have been consistent across multiple study designs. Several veteran-focused organizations have supported HBOT-TBI research for military blast injury populations.
At Land and Sea PT, we offer HBOT as a wellness service for people navigating TBI recovery. We are not a neurological clinic, and HBOT is not a substitute for specialized neurological care — but it may be worth exploring as a complement to it. If you or a family member is dealing with the long-term effects of a TBI, we're glad to walk you through the research and have an honest conversation about whether HBOT makes sense.
WANT TO KNOW IF HBOT IS RIGHT FOR YOU?
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OTHER CONDITIONS
PEOPLE ARE EXPLORING WITH HBOT
PEOPLE ARE EXPLORING WITH HBOT
HBOT is being studied across a wide range of conditions. Explore what the research shows for other areas at Land and Sea PT in Oceanside.
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If you or a family member is navigating TBI recovery — whether it's recent or years ago — we're here to walk you through what HBOT is, what the research shows, and whether it makes sense alongside your current care.
This page is educational only. HBOT is not an approved treatment for traumatic brain injury. Results vary between individuals. Always work with your neurological healthcare team. HBOT at Land and Sea PT is offered as a wellness service.
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References
- Hadanny et al. Sagol Center for Hyperbaric Medicine, Tel Aviv University. Chronic TBI cognitive outcomes study.
- Boussi-Gross et al. "Hyperbaric oxygen therapy can improve post concussion syndrome years after mild traumatic brain injury." PLOS ONE, 2013. DOI: 10.1371/journal.pone.0079995
- Thom et al. "Stem cell mobilization by hyperbaric oxygen." American Journal of Physiology, 2006. DOI: 10.1152/ajpheart.00306.2006