Tools & Reference

Quick-reference tables

Quick-reference summaries are gathered here for clinical use. Tables and figures throughout the atlas can be printed via the print buttons on each module page, or the entire atlas can be exported via /print-all.

Latency norms (MCT): 120–150 ms in healthy adults under 60. Upper limit of normal ~165 ms. Latencies above 170 ms warrant attention to central pathology.

Composite norms (SOT): ≥70 in healthy adults under 60; ≥60 by age 75. Device-specific norms apply.

Sensory ratio cutoffs: SOM ≥0.90, VIS ≥0.75, VEST ≥0.60, PREF ≤0.92. Below these values is the abnormal direction (above for PREF).

Disease pattern matrix: Vestibular pattern → peripheral (neuritis, Ménière's, schwannoma). Across-the-board reduction + prolonged latency + non-adapting → central. Visual preference + over-scaling → PPPD. Cevette inversion → aphysiologic (consider functional / effort modulation).

Reporting checklists

A reporting checklist for a complete CDP report:

1. Test conditions — date, device, examiner, patient height and stocking-feet stance, harness adjustment, calibration status.

2. SOT — composite score, condition-by-condition means, falls per condition, sensory ratios with classification (normal / reduced / markedly reduced).

3. MCT — latencies for small / medium / large translations in each direction; amplitude scaling; weight symmetry.

4. ADT — sway energies trial-by-trial in each direction; adaptation present / absent.

5. Pattern recognition — name the canonical pattern (vestibular / visual-vestibular / surface-dependent / visual preference / central triad / aphysiologic / mixed).

6. Clinical correlation — relevant prior findings (audiometry, HIT, calorics, imaging), the question the test was asked to answer, and the answer given.

7. Caveats and limitations — anything that compromises the test (harness assist, anxious effort, atypical configurations).

Calculators

Two simple calculations are useful in CDP interpretation but rarely shown explicitly on commercial reports.

Falls-weighted composite: a single fall in three trials drops the condition mean by 33 points if scored as zero. Some clinicians prefer to report fall trials separately so the underlying sway profile is visible.

Age-adjusted composite: a rough adjustment subtracts 0.4 points per year over age 60. A 75-year-old patient with a composite of 64 is borderline normal; the same composite in a 30-year-old is clearly abnormal. Device-supplied age-norm tables are more accurate.

These calculators are not built into the atlas as interactive tools — the values are simple enough that explicit computation rarely changes a clinical decision. The pattern recognition layer carries the diagnostic information.