Reiki and the Vagus Nerve

The vagus nerve in plain terms

The vagus nerve is the tenth cranial nerve. It runs from the brainstem through the throat, lungs, heart, and gut, and carries roughly 75 percent of the parasympathetic nervous system.^[1] When it is active — a state usually described as "high vagal tone" — the body digests, sleeps, recovers from stress, and accesses social engagement. When it is suppressed, the opposite of all of those things tends to happen.

Polyvagal theory, briefly

Stephen Porges developed polyvagal theory beginning in the 1990s at the University of Maryland and the University of North Carolina.^[2] The core insight relevant here: safety is signalled to the brain through bodily cues rather than concluded by reasoning. Slow breath, relaxed facial muscles, predictable touch, gentle vocal tone — these are the cues that activate the ventral vagal branch and bring the body into a regulated state.

Conversely, chronic stress, trauma, autoimmune disease, and many forms of anxiety are characterised by low vagal tone — a body that has lost easy access to that regulated state.^[3]

How Reiki shows up in autonomic measurements

Heart-rate variability is the standard non-invasive marker of vagal tone. McManus' 2017 evidence review in the Journal of Evidence-Based Complementary & Alternative Medicine synthesises the autonomic findings across published Reiki trials: reduced heart rate, reduced diastolic blood pressure, increased heart-rate variability, and falls in salivary cortisol during sessions.^[4]

Why this matters across so many conditions

Low vagal tone is increasingly recognised as a common thread across conditions previously thought unrelated:

• Generalised anxiety, panic, depression
• Inflammatory conditions including rheumatoid arthritis, inflammatory bowel disease
• Functional gastrointestinal disorders such as IBS
• Chronic pain syndromes including fibromyalgia
• Long COVID and post-viral fatigue
• Burnout and HPA-axis dysregulation

Any practice that reliably raises vagal tone — Reiki, slow diaphragmatic breathing, cold-water exposure, somatic therapy, certain forms of meditation, secure social contact — is doing physiological work on the same underlying axis. That is not magical thinking; it is reasonably well-grounded autonomic science.

What Amanda does with this

Sessions combine Reiki with optional conscious connected breathwork. Breathwork has a direct mechanical effect on vagal tone via diaphragmatic activation;^[5] Reiki adds the touch and presence cues that polyvagal theory associates with ventral vagal activation. The combination targets the same nerve from two angles in a single session.