A 2024 comprehensive review found SGB efficacy for PTSD symptoms ranges from 70–83% of treated patients achieving clinically significant positive outcomes across the full range of existing studies
Stellate Ganglion Block in Energy Corridor, Houston TX: Rapid Relief for PTSD, Anxiety, and Trauma
The Energy Corridor runs a 7-mile stretch of I-10 between Kirkwood and Barker Cypress — 94,000 employees, 26 million square feet of office space, BP, Shell, ConocoPhillips, Citgo, and hundreds of supporting firms in the district the Texas Legislature formally created in 2001. The engineers, geoscientists, project managers, and veterans who drive this economy are evaluated every day on performance: decision-making under pressure, cognitive sharpness, sustained concentration, rapid problem-solving. What PTSD and anxiety cost in those domains is measured, even when the condition itself goes unnamed. Stellate ganglion block addresses the biology sustaining that cost — a minimally invasive procedure that resets the overactivated sympathetic nervous system and, according to peer-reviewed military research, not only doesn’t impair cognitive performance but trends toward improving it. Dr. Ho, board-certified anesthesiologist and former pediatrician, performs this ultrasound-guided procedure at Catalyst Health & Wellness for Energy Corridor residents and workers, and patients from Memorial, Katy, Copperfield, Westchase, and west Houston. Three Houston locations, open 5am–9pm, seven days a week.
Energy Corridor Professionals Ask This Question
When engineers and project managers in a high-stakes technical environment evaluate any intervention — a new drilling technique, a process change, a safety protocol — they ask two questions before anything else: does it work, and does it cost anything we can’t afford to pay? For PTSD and anxiety treatment, the second question has a specific professional meaning: will this affect my cognitive performance, my clearances, my ability to function at the level my career requires?
The 2015 Mulvaney case series in Military Medicine is the study that answers that question directly. Eleven patients diagnosed with PTSD underwent SGB and received a standardized battery of eight neurocognitive performance measures — testing reaction time, memory, and concentration — before and one to three weeks after the procedure. The result: none of the patients showed any statistically significant decline in neurocognitive performance following SGB. More remarkably, four of the eight measures showed statistically significant improvement — with all patients also showing meaningful improvement in PTSD symptoms. The study’s conclusion is unambiguous: “SGB effectively treated PTSD symptoms and did not impair reaction time, memory, or concentration.”
For a workforce that runs on cognitive performance — where geoscientists interpret seismic data, engineers model complex systems, and mission-critical decisions happen under time pressure — this evidence directly removes the barrier that keeps high-performing professionals from seeking treatment they know they need. SGB doesn’t cost cognitive capacity. Based on the published data, it appears to restore it.
What is Stellate Ganglion Block?
The stellate ganglion — the sympathetic nerve cluster formed by the fusion of the inferior cervical and first thoracic ganglia at the base of the neck — governs sympathetic outflow to the head, neck, upper body, and cardiovascular system. In PTSD and chronic anxiety, trauma elevates nerve growth factor, drives sympathetic nerve sprouting, sustains elevated norepinephrine, and maintains the amygdala in a state of chronic hyperarousal. That hyperarousal is what cognitive scientists and performance psychologists describe as consuming working memory bandwidth: a nervous system running continuous threat-detection uses resources that would otherwise be available for complex reasoning, sustained attention, and creative problem-solving.
Research consistently shows powerful results:
What Our Patients Say
How Stellate Ganglion Block Works
For the Energy Corridor's engineering and analytical workforce, the mechanism has a precise and compelling explanation.
Resetting the Sympathetic Nervous System
The sympathetic nervous system, in PTSD, operates like a computational process running in the background of every other cognitive task — continuously monitoring the environment for threat, maintaining elevated norepinephrine that keeps the amygdala in hair-trigger readiness, and consuming the working memory bandwidth and executive function capacity that would otherwise be available for technical problem-solving. The Mulvaney 2015 study's cognitive performance findings make this mechanism visible in clinical data: as PTSD symptoms improve following SGB — as the amygdala recalibrates, norepinephrine normalizes, and the background threat-detection process quiets — the cognitive capacities it was consuming become measurably available again.
Nerve growth factor elevation drives the sympathetic nerve sprouting sustaining this state. The stellate ganglion is the anatomical node where that outflow can be most precisely interrupted with a local anesthetic injection under ultrasound guidance. When the block is placed correctly — confirmed by the Horner syndrome response of warmth and slight hoarseness — the NGF cascade can normalize, the sympathetic overdrive can drop, and the amygdala can recalibrate. That reset is what four of eight cognitive measures showed statistically significant improvement reflecting in the clinical data.
Reducing Brain Inflammation and Hyperactivity
Beyond the immediate sympathetic reset, SGB produces measurable changes in amygdala function that persist well beyond the anesthetic's active window. The amygdala in PTSD is chronically hyperresponsive — treating neutral stimuli as threatening and consuming cognitive resources in continuous low-level threat assessment that most people experiencing it have normalized as "just how I function." Neuroimaging researchers at the Long Beach VA documented measurable changes in amygdala activity following SGB using functional imaging, providing direct evidence for the biological recalibration underlying the clinical improvements.
For Energy Corridor professionals whose career performance depends on the cognitive functions PTSD has been degrading — sustained attention, working memory, rapid decision-making under uncertainty — this amygdala recalibration isn't just symptom relief. It's the restoration of professional capacity.
Conditions We Treat with Stellate Ganglion Block in Energy Corridor
SGB addresses sympathetic nervous system dysregulation across a range of conditions. At Catalyst Health & Wellness, we offer SGB for:
PTSD
Rapid relief from hyperarousal, hypervigilance, and trauma symptoms
Read MoreAnxiety Disorders
Reducing the physical manifestations of severe anxiety
Read MorePanic Disorder
Calming the fight-or-flight response that drives panic attacks
Read MoreCombat-Related Trauma
Extensively studied in military populations with strong results
Read MoreComplex Trauma
Addressing symptoms from prolonged or repeated traumatic experiences
Read MoreTrauma with Physical Symptoms
Especially effective when anxiety manifests physically
Read MoreSGB integrates powerfully with Catalyst's other treatments. Many Energy Corridor patients combine SGB with ketamine therapy, Spravato, or TMS for comprehensive treatment of complex presentations.
Your Stellate Ganglion Block Journey at Catalyst Health & Wellness
Every step is designed for clinical precision and efficiency — as respectful of the Energy Corridor professional's time as of their health.
Step 1: Free Phone Consultation
No cost, no commitment. A clinical team member discusses your symptoms, treatment history, and professional context — including performance concerns — and gives you an honest clinical assessment of whether SGB is appropriate.
Step 2: Medical Evaluation
Dr. Ho conducts a thorough pre-procedure evaluation: medical history, current medications, prior procedures, and contraindication review. Every question answered before any commitment is made.
Step 3: Day of Procedure
Budget two to three hours at the clinic. Arrange transportation — post-procedure driving isn’t advisable on the day of the injection. Comfortable clothing with accessible collar area. Normal eating unless instructed otherwise.
Step 4: The SGB Procedure
Dr. Ho uses real-time ultrasound imaging to visualize the stellate ganglion and surrounding anatomy before needle placement. Skin is numbed first. The anesthetic is delivered under continuous imaging guidance. The injection takes approximately 15–20 minutes. Warmth, slight hoarseness, or a sense of physical release confirm the block is working.
Step 5: Recovery & Observation
One to two hours of monitored recovery follows. Temporary Horner syndrome effects — drooping eyelid, hoarseness, warmth — indicate successful stellate ganglion interruption and resolve within hours. Our team remains present throughout.
Step 6: Assessing Response & Follow-Up
Changes typically emerge within hours to days. Our team follows up to track response and determine next steps: a second procedure two weeks later, maintenance scheduling, or complementary treatment options at Catalyst.
The Science Behind Stellate Ganglion Block
A systematic review published in Chronic Stress examined 17 published studies on SGB for psychiatric disorders, finding preliminary evidence supporting feasibility for treating sympathetic nervous system dysregulation conditions. Improvements were observed within 5 minutes and lasted one month or longer.
The 2020 randomized controlled trial in JAMA Psychiatry enrolled 113 active-duty service members across three military hospitals. Two SGBs two weeks apart produced a mean PTSD symptom reduction of −12.6 points versus −6.1 for sham — establishing Level 1B clinical evidence for SGB.
The 2015 Military Medicine neurocognitive case series by Mulvaney and colleagues administered a standardized battery of eight cognitive measures — including reaction time, memory, and concentration — to eleven PTSD patients before and one to three weeks after SGB. Not one patient showed statistically significant decline in any measure. Four of eight measures showed statistically significant improvement. Mean PTSD Checklist improvement was 29 points. Conclusion: “SGB effectively treated PTSD symptoms and did not impair reaction time, memory, or concentration.” For the Energy Corridor’s performance-driven workforce, this is the most directly applicable SGB evidence published.
Key research findings:
- SGB preserved neurocognitive performance across all measured domains — and produced statistically significant improvement in four of eight measures alongside PTSD symptom improvement
- The 2020 JAMA Psychiatry RCT established Level 1B evidence — the highest clinical standard yet achieved for SGB
- 70–83% of treated patients achieve clinically significant positive outcomes; effects appear within minutes to hours and last one month or longer
- The cognitive improvement data reflects the mechanism: as PTSD’s background sympathetic processing quiets, the cognitive resources it was consuming become measurably available
Why Choose Catalyst Health & Wellness for Stellate Ganglion Block in Energy Corridor
01
Led by Dr. Ho – Anesthesiology Expertise
SGB is performed adjacent to the carotid artery, jugular vein, and vagus nerve. Accurate placement under ultrasound guidance, using appropriate anesthetic volume and concentration, requires nerve block anatomy expertise that is foundational to anesthesiology training. Dr. Ho's board certification is precisely aligned with what this procedure technically requires — not an adjacent credential, but the core one. For an engineering workforce accustomed to evaluating specialists by the fit between credential and task, that alignment matters.
02
Ultrasound-Guided Precision
The 2015 neurocognitive study — the most performance-relevant SGB data for Energy Corridor professionals — used ultrasound-guided technique throughout. Every SGB at Catalyst uses real-time ultrasound imaging. Direct visualization of the stellate ganglion and surrounding anatomy before needle placement. The only approach Dr. Ho uses.
03
Whole-Person Approach
Energy Corridor patients often arrive with specific professional concerns about how treatment might affect performance, clearances, or scheduling. Our team engages with that full picture — the clinical, the professional, and the practical — rather than treating the diagnosis in isolation from the life it affects. Treatment plans reflect that complete assessment and coordinate with existing care providers.
04
Extended Hours & Flexible Scheduling
Energy operations run around the clock. Project timelines don’t observe standard clinical hours. Our 5am to 9pm schedule, Monday through Sunday at all three Houston locations, means pre-dawn appointments before early-morning site calls, evening sessions after long operational shifts, and weekend procedures when the project schedule allows. The Heights clinic is directly accessible from the Energy Corridor via I-10 East.
05
Comprehensive Treatment Options
SGB works best as part of a comprehensive approach to trauma recovery. We offer additional treatments that can complement your care:
IV Ketamine Therapy
Rapid relief for PTSD, depression, and anxiety
IM Ketamine Therapy
Intramuscular ketamine for those who prefer this method
Spravato Treatment
FDA-approved nasal esketamine for treatment-resistant depression
TMS Therapy
Non-invasive brain stimulation for depression and OCD
Many patients find that combining SGB with ketamine therapy produces the most comprehensive relief from trauma symptoms.
06
Safe, Comfortable Environment
We understand that people with trauma need to feel safe. Every detail of our treatment environment has been designed with your comfort in mind. Our staff is trained in trauma-informed care, and we move at your pace throughout the entire process. You’ll never be rushed or pressured.
Getting Started with Stellate Ganglion Block in Energy Corridor
The Energy Corridor’s entire identity is built on solving problems that required new approaches — moving from conventional to unconventional resources, from analog to digital monitoring, from guesswork to data-driven decision-making. If PTSD or anxiety has been the problem that conventional treatment hasn’t solved — and if the performance cost of that condition has been measurable — SGB offers a biologically direct intervention that the data says doesn’t cost cognitive performance. According to the same data, it may improve it.
Call (713) 772-5315 for your free consultation. We’ll engage with your history, your professional context, and your specific questions about performance effects. No charge, no pressure, complete confidentiality.
Our Heights clinic is accessible from the Energy Corridor via I-10 East. All three Catalyst locations open 5am to 9pm, every day.
Monday-Sunday, 5am-9pm
Free consultation
Rapid relief
Three Houston locations
Expert anesthesiology care
Commonly Asked Questions
Get Help NowHow quickly does stellate ganglion block work?
Many patients notice improvement within days of the procedure, and some experience relief within minutes. Research shows that effects can appear within 5 minutes and last a month or longer. This rapid onset is one of SGB’s most remarkable features, especially for people who’ve been suffering with trauma symptoms for years.
Is stellate ganglion block safe?
Yes, SGB has been performed safely since the 1920s for various conditions. The procedure has a well-established safety profile with decades of clinical use. Common temporary effects include drooping eyelid, hoarse voice, and warmth on the treated side—all of which resolve within hours. Dr. Ho’s expertise as an anesthesiologist and use of ultrasound guidance ensures the highest safety standards.
Does the procedure hurt?
Most patients experience minimal discomfort. You’ll feel a small pinch from the initial numbing injection, followed by pressure as the medication is administered. The procedure itself takes only minutes, and most patients tolerate it very well. Dr. Ho’s gentle technique and experience help ensure your comfort.
How many SGB treatments will I need?
Many patients experience significant improvement after one or two treatments. Research protocols typically involve two SGBs administered two weeks apart. Some patients benefit from additional treatments over time. We’ll assess your response and recommend a treatment schedule based on your individual results.
How long do the effects last?
Effects typically last one month or longer, with some patients experiencing sustained improvement for many months. A 2025 study found that 96% of patients maintained significant improvement at 6-month follow-up. If symptoms return, the procedure can be repeated.
Can I combine SGB with other treatments?
Yes, many patients find that SGB works best as part of a comprehensive treatment approach. Combining SGB with ketamine therapy, for example, can provide both rapid sympathetic nervous system reset and enhanced neuroplasticity for processing trauma. SGB may also make traditional trauma therapy more tolerable and effective.
Do I need to talk about my trauma during treatment?
No. Unlike trauma-focused therapies that require detailed discussion of traumatic events, SGB works on the biological mechanisms underlying PTSD symptoms. You can share as much or as little as you’re comfortable with. The procedure addresses the physical hyperarousal component of trauma without requiring you to revisit painful memories.
Will insurance cover stellate ganglion block for PTSD?
Coverage varies by insurance plan. SGB for PTSD may be covered by some insurers, particularly when documented as treatment for a recognized condition with failed conventional treatments. We can help verify your benefits and discuss payment options during your consultation.
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