Central Motor Conduction Time Calculator
Actual cortical MEPonset minus independently established peripheral motor conduction time, not component peak subtraction or automatic F/Mformula applicability. Negative discrepancy retained for qualified review, not a diagnosis.
Description
Estimated central motor conduction time subtracts an independently established peripheral time from a cortical response onset.
Estimated central motor conduction time subtracts an independently established peripheral time from a cortical response onset.1
A signed residual depends on the applicable latency model.
When to use Central Motor Conduction Time Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the assessment or recording protocol, units, instrument version and independently applicable reference or calibration.
How to use Central Motor Conduction Time Calculator and understand its results
- Establish the assessment or recording protocol, units, instrument version and independently applicable reference or calibration.
- Enter independentlyEstablishedCorticalMepOnsetMs, independentlyEstablishedPeripheralMotorTimeMs, using the field meanings and rules below, then run the tool.
- Read result.signedEstimatedCentralMotorConductionMs. Use the units and sign conventions below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyEstablishedCorticalMepOnsetMs | Independently established cortical mep onset ms | number | Required |
| independentlyEstablishedPeripheralMotorTimeMs | Independently established peripheral motor time ms | number | Required |
Require nonnegative cortical onset and peripheral motor time in milliseconds. Subtract peripheral from cortical, allowing a negative residual without diagnosis or clamping.
signedEstimatedCentralMs=corticalOnsetMs−peripheralMotorTimeMs Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result; its nested fields below contain the actual calculation or selected reference | object |
| result.signedEstimatedCentralMotorConductionMs | Signed Estimated Central Motor Conduction Ms; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"independentlyEstablishedCorticalMepOnsetMs": 20,
"independentlyEstablishedPeripheralMotorTimeMs": 10
},
"output": {
"result": {
"signedEstimatedCentralMotorConductionMs": 10
}
}
}Limitations and assumptions
Actual acquisition, assessment protocol, instrument version and calibration determine applicability. The tool does not examine a person, classify images, administer a questionnaire or choose diagnostic cutoffs.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use MEP Latency Calculator: A motor-evoked response has a component peak and an independently identifiable onset. For a complementary comparison, use H-Reflex Latency Calculator: An H-reflex has an identified component peak and a separately determined onset.
References
-
Central Motor Conduction Time Calculator — tool.io
Similar or alternative tools
- MEP Latency Calculator
A motor-evoked response has a component peak and an independently identifiable onset.
- H-Reflex Latency Calculator
An H-reflex has an identified component peak and a separately determined onset.