Pruning Rate Calculator
Signed observed synapse loss per measured elapsed year using compatible independent observations. Pruning attribution cannot be inferred from density/count changes alone; no universal developmental rate, forecast or age diagnosis.
Description
A synapse-count reduction rate compares matched earlier and later observations.
A synapse-count reduction rate compares matched earlier and later observations.1
Its sign preserves an increase as a negative reduction rather than forcing a pruning interpretation.
When to use Pruning Rate 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 Pruning Rate Calculator and understand its results
- Establish the assessment or recording protocol, units, instrument version and independently applicable reference or calibration.
- Enter independentlyMeasuredEarlierSynapseCount, independentlyMeasuredLaterSynapseCount, independentlyMeasuredElapsedYears, using the field meanings and rules below, then run the tool.
- Read result.signedObservedChangePerYear. 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 |
|---|---|---|---|
| independentlyMeasuredEarlierSynapseCount | Independently measured earlier synapse count | number | Required |
| independentlyMeasuredLaterSynapseCount | Independently measured later synapse count | number | Required |
| independentlyMeasuredElapsedYears | Independently measured elapsed years | number | Required |
Require nonnegative earlier/later counts and positive elapsed years. Return earlier-minus-later divided by elapsed years; fractional counts are permitted and increases return negative reduction rates.
signedReductionPerYear=(earlierCount−laterCount)/elapsedYears 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.signedObservedChangePerYear | Signed Observed Change Per Year; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"independentlyMeasuredEarlierSynapseCount": 100,
"independentlyMeasuredLaterSynapseCount": 90,
"independentlyMeasuredElapsedYears": 2
},
"output": {
"result": {
"signedObservedChangePerYear": 5
}
}
}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 Brain Growth Rate Calculator: Brain-volume growth rate compares matched volumes over an established elapsed time. For a complementary comparison, use Annualized Brain Atrophy Calculator: Annualized brain atrophy expresses baseline-relative volume loss over elapsed years.
References
-
Pruning Rate Calculator — tool.io
Similar or alternative tools
- Brain Growth Rate Calculator
Brain-volume growth rate compares matched volumes over an established elapsed time.
- Annualized Brain Atrophy Calculator
Annualized brain atrophy expresses baseline-relative volume loss over elapsed years.