Score left, right, and both-paw wall contacts, map lesion side, calculate Schallert asymmetry index, and export animal-level CSV.
Enter left-only, right-only, both-paw, and optional no-contact events. Lesion side determines ipsilateral and contralateral assignment automatically.
| Animal | Group | Lesion side | Left only | Right only | Both paws | None | Contacts |
|---|---|---|---|---|---|---|---|
| 22 | |||||||
| 21 | |||||||
| 20 |
| Animal | Group | Ipsi | Contra | Both | Asymmetry index | Left use |
|---|---|---|---|---|---|---|
| M1 | sham | 9 | 8 | 5 | 0.045 | 40.9% |
| M2 | 6OHDA | 14 | 3 | 4 | 0.524 | 66.7% |
| M3 | 6OHDA | 13 | 2 | 5 | 0.550 | 10.0% |
When to use
Do not use for
The same left and right counts can produce different ipsilateral and contralateral assignments depending on lesion side.
The Schallert formula includes both-paw contacts in the denominator, which reduces asymmetry magnitude when bilateral use is common.
A short or low-exploration session can produce unstable asymmetry estimates. Treat contact threshold flags as QC prompts.
Ipsilateral contacts are assigned from lesion side: left lesion maps left-only contacts to ipsilateral, right lesion maps right-only contacts to ipsilateral. Asymmetry index is (ipsilateral - contralateral) divided by ipsilateral plus contralateral plus both-paw contacts. Group summaries are computed from animal asymmetry indices and SEM uses sample standard deviation divided by square root of n.
Last validated 2026-04-30. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.
ConductScience Cylinder Test Scorer (v1.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/cylinder-test-scorer
This tool performs descriptive calculations from user-entered cylinder test counts. It does not replace protocol-specific statistics, exclusion criteria, or animal welfare oversight.
The cylinder test is a spontaneous forelimb-use assay. A rodent is placed in a transparent cylinder and the observer scores wall contacts made with the left paw, right paw, or both paws during vertical exploration.
Because unilateral motor lesions often reduce use of the contralateral forelimb, the assay is widely used in 6-OHDA, MCAO stroke, and other lateralized sensorimotor models.
This scorer assigns ipsilateral and contralateral contacts from the lesion side. It computes the Schallert asymmetry index as (ipsilateral - contralateral) / (ipsilateral + contralateral + both). It also reports percent left use as left-only contacts divided by all left, right, and both-paw contacts.
None events are exported for audit context but are not included in the asymmetry denominator.
Predefine contact rules, score enough contacts per animal, and blind observers to treatment or lesion status when possible. Clean the cylinder between animals and avoid reflections or lighting artifacts that make paw contact calls ambiguous.
Balance testing time and habituation because arousal and exploratory drive can change the number of usable contacts.
Transparent cylinder setup for spontaneous forelimb-use asymmetry testing
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