Neurostimulation Threshold
The minimum stimulation amplitude required to elicit a detectable neural response or therapeutic effect.
Full Definition
Neurostimulation threshold refers to the minimum electrical stimulation amplitude necessary to produce a detectable neural response, therapeutic effect, or patient sensation. Thresholds can be defined in various ways depending on the clinical endpoint: sensory threshold (first detectable sensation), therapeutic threshold (onset of symptom relief), discomfort threshold (maximum tolerable stimulation), and motor threshold (muscle contraction onset). Threshold determination is crucial for establishing appropriate stimulation parameters and therapeutic windows. Factors affecting thresholds include electrode position, tissue properties, pulse width, frequency, and individual patient characteristics. Regular threshold testing helps optimize programming and detect potential system changes such as lead migration or tissue encapsulation.
Usage
Usage note: Specify the type of threshold (sensory, motor, therapeutic) for clarity.
In Context
- "The sensory threshold was established at 2.1 volts before programming therapeutic stimulation parameters." — Programming session notes
- "Rising neurostimulation thresholds may indicate lead migration or tissue encapsulation around the electrodes." — Troubleshooting guide