Welcome to the group! I know the first few modules are in the Classroom: Skool.com/vagus/classroom available to read right now - but I always see the same question pop up immediately: "What device should I buy?" Instead of *I guess* hoping you will make use of the Classroom which already has the answer, or hoping you would use the Search feature at the top of the site, I wanted to put the answer front and center. This post will be pinned at the top, so you can reference it anytime. The goal is to get you started with the right tool for your region. Let's break it down: USA: If you are in the USA: The US-1000 is your go-to. It’s affordable, incredibly effective, and the perfect entry point for Vagus Nerve Stimulation. For around $54 USD, it’s one of the most accessible biohacks you can invest in. The benefits—from reduced inflammation and deeper sleep to a calmer nervous system—are tremendous for the price. - 👉 Click for Module 2: How to Buy an Ultrasound - 👉 Click for Module 3: How to Use & Place Ultrasound 🌍 If you are in Canada: Great news, the US-1000 is also easily available. - Canada Supplier: Link EU: If you are in the EU or UK: The Rules are a Little Different Due to regulations and availability, the US-1000 isn't sold here. You’ll be looking at the US-2000 Pro class of device. Don't let the "Pro" name intimidate you! It simply means these units produce a higher power output and offer more focused stimulation. You don't really have a choice in the matter, but honestly, you're getting a slightly more powerful unit out of the gate.

Sleep requires a precise shift from sympathetic activation to parasympathetic dominance, orchestrated by the vagus nerve. Low vagal tone causes a sluggish shift, leading to difficulty falling asleep, frequent waking, and poor sleep quality. Higher nighttime HRV correlates with more time in deep slow-wave sleep and REM sleep, where physical repair and memory consolidation occur. Sleep doctors use overnight HRV as a complementary marker to traditional sleep architecture. People with high vagal tone sleep less but feel more rested than those with low vagal tone, who spend more total hours in bed. During deep sleep, the vagus nerve increases its firing rate, slowing heart rate to its lowest resting point and reducing blood pressure. This parasympathetic dominance shifts resources to muscle growth, tissue regeneration, immune strengthening, and neural waste clearance via the glymphatic system. During REM sleep, vagal tone fluctuates dynamically, supporting the vivid dream state while maintaining physiological stability. Poor vagal function disrupts REM cycling, contributing to vivid nightmares, unrefreshing sleep, and daytime fatigue. The glymphatic system operates primarily during deep sleep. Inadequate parasympathetic dominance reduces glymphatic flow, causing inflammatory byproducts and metabolic waste to accumulate in brain tissue, contributing long-term to neurodegenerative disease risk. Low vagal tone disrupts sleep through elevated nighttime heart rate and sympathetic activity, reduced time in deep sleep and REM stages, increased sleep latency, more frequent nighttime awakenings (particularly 2am-4am), higher cortisol levels disrupting circadian rhythm, less recovery per hour of sleep, and greater sensitivity to light, sound, and temperature disturbances. Evening vagal activation practices improve sleep quality by shifting to parasympathetic dominance in the last 30-60 minutes before bed. Practices include 4-7-8 breathing (inhale 4s, hold 7s, exhale 8s), left nostril breathing for 5 minutes, humming or chanting to stimulate auricular vagus branch, cold face wash triggering dive reflex, progressive muscle relaxation, and body scan meditation.

This is a Free to Join Skool Community! A community designed to help people Stimulate and Repair their Vagus Nerve! Comment Below! - What you know about the Vagus Nerve 🦄 - Your preferred method of Vagus Nerve Stimulation ? (Breath, TENS, Ultrasound, etc?) 👩‍💼 - A Want or Have Had Experience from Vagus Nerve Land !? (A win, or something you are striving for) And when you comment, like a post, get 5 likes across your comments, and click "Complete" on a few of the modules in the Classroom, you can then unlock the Ultrasound module ! YAY ! So, I hope this can become a great community page, it's very open, and you have access to SO MUCH good information, actionable information, on the Vagus Nerve, and all the ways you can make it happy and healthy ! So from the Vagus Skool to you and yours... WELCOME !

We are seeing the threshold where consistent neck-based ultrasound stimulation transitions from a localized vagal intervention into a systemic dampening of the inflammatory reflex. You understand that the vagus nerve acts as the primary conduit for the inflammatory reflex, and you’ve accepted that the temporal precision of ultrasound allows for a direct interface with the cervical vagus. You know that the shift from several migraines a week to nearly none is a deliberate recalibration of your autonomic baseline. You’ve also recognized that more stimulation does not linearly equate to better outcomes when dealing with delicate autonomic signaling. You know that extending sessions toward the hour mark yields diminishing returns because the biological receptors reach a saturation point. You’ve been cautious about overstimulation, realizing the body requires specific integration windows to translate a mechanical pulse into a lasting shift in tone. What we are witnessing is the transition from cervical modulation to a systemic engagement of the spleen, which acts as the terminal effector for the body's self-generated stress damage. By moving toward the spleen, you are activating a specialized filter that moderates the inflammatory response triggered by your own internal stress states. This targeting reveals that migraine reduction comes from utilizing the spleen as a buffer to prevent the body from damaging itself during peak arousal. The spleen is the physical site where the abstract stress response is converted into concrete, manageable inflammatory signals. The goal of this protocol is the intentional activation of the spleen as the primary regulator of self-induced inflammatory harm. https://www.skool.com/vagus/less-migraines-questions-about-overstimulation-spleen

Cognitive decline in aging is not solely a brain-centric issue. Recent research identifies a gut-microbiome mechanism that impairs memory encoding and hippocampal function. Ageing is accompanied by declining memory function. The study charts microbiome ageing in mice and identifies a mechanism where inhibition of gut–brain signalling impairs hippocampal neuronal activation and memory encoding. Accumulation of gut bacteria producing medium-chain fatty acids, such as Parabacteroides goldsteinii, drives peripheral myeloid cell inflammation through GPR84 signalling. This impairs vagal afferent neuron function, weakens interoceptive signals to the brain, and causes hippocampal dysfunction. Co-housing 2-month-old young mice with 18-month-old aged mice equilibrated microbiomes to an old-like state without altering frailty. After one month, young mice showed impaired short-term memory in novel object recognition (NOR) and long-term spatial memory in Barnes maze, in both sexes and across vendors. Explorative behaviour was unaffected. Prolonged co-housing maintained the deficit. Causality was tested via four strategies: co-housing young with young (no effect); faecal microbiota transfer (FMT) from aged to germ-free young mice recapitulated old-like microbiome and cognitive impairment; germ-free co-housing of young with aged germ-free mice showed no impairment, and germ-free mice had delayed cognitive decline; antibiotic ablation of donor microbiomes or during co-housing prevented deficits. Antibiotics after impairment restored memory in co-housed young mice and improved aged mice. Longitudinal metagenomic sequencing and proteomics on 15 male C57BL/6 mice from weaning to death (mean lifespan 955 days) showed age as a major driver of microbiome composition, with 1,133 species altered. Parabacteroides goldsteinii was the top candidate: abundance increased with age, transmissible by co-housing/FMT, colonization of germ-free or antibiotic-treated mice induced NOR impairment, and natural high abundance reduced memory. Other age-associated bacteria (Alistipes, Lachnospiraceae) or non-changing (Lactobacillus acidophilus) did not impair cognition.