EAR ANATOMY
Auricular taVNS Stimulation Sites: Cymba, Cavum, and Tragus
taVNS studies use several outer-ear locations. Site names alone do not describe the full stimulation setup.
Source review · 19 October 2026 · Educational content
REFERENCE TABLE
Commonly reported auricular locations
01
Anatomy and nerve distribution
The auricular branch of the vagus nerve is one of several nerves associated with the external ear. Anatomical reviews describe variable innervation across auricular regions, which limits simple site-to-nerve assumptions.
A site label cannot confirm selective nerve engagement. Electrode geometry, contact position, current path, tissue contact, and individual anatomy also affect delivery.
02
How placement changes a protocol
Two studies using the same named site may use different contact pairs, electrode sizes, laterality, intensity rules, and session schedules. Those differences affect comparison and replication.
Clear reports include photographs or diagrams, anatomical landmarks, active and reference contacts, ear side, electrode material, and contact area.
03
Control and sham locations
The earlobe is often selected as a comparison location, but a convincing sham also depends on sensation, masking, electrical exposure, and participant expectations. The location alone does not determine control quality.
QUESTIONS
Frequently asked questions
Which ear sites appear most often in taVNS studies?
The cymba conchae, cavum conchae, and tragus are common. Protocols differ in exact placement and contact arrangement.
Is the earlobe always an inactive sham?
No. Its suitability depends on the scientific question, electrical setup, sensation, and masking assessment.
Does an anatomical site prove vagus nerve engagement?
No. Anatomy provides a rationale, while engagement requires evidence from the complete protocol.
PRIMARY SOURCES
Research behind this guide
These sources describe the wider research field and do not constitute product-specific evidence for NeuroThaw.
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