Protocol and stimulation parameters
Definition
Session duration is the total elapsed time assigned to one stimulation session.
Aliases and abbreviations
stimulation session length · session length
Editorial record
Published: August 25, 2026 · Reviewed: August 25, 2026
Expanded definition
Session duration is normally reported in minutes, but the meaning depends on the protocol. A 30-minute session may contain continuous stimulation or repeated on/off periods with less than 30 minutes of active output.
It should be distinguished from the number of sessions, the spacing between sessions, the number of treatment days, and cumulative exposure across a study or routine.
Duration can interact with intensity, frequency, duty cycle, tolerability, and the outcome being measured. A duration used in one population or device cannot be assumed to be optimal for another.
What the term does not establish
Why the distinction matters
Clear duration reporting prevents a study's total exposure from being reduced to one ambiguous number and helps readers compare protocols responsibly.
Main guide
A research overview of parameter combinations, session design, and method-specific interpretation.
Explore protocol researchSources and further reading
Related terms
Protocol and stimulation parameters
Protocol and stimulation parameters
Protocol and stimulation parameters
Safety and research
Safety and research
Protocol and stimulation parameters
Editorial scope
This glossary entry supports general education. It does not diagnose, recommend treatment, or transfer findings from one VNS method, protocol, or device to another.