Compare

Side-by-side HINTS signatures. Pick any two patterns to see their head-impulse and nystagmus traces with the key discriminators surfaced for you.

The two pickers below choose from nine canonical patterns plus a normal reference. The traces update live. Use this tool to anchor the difference between, say, vestibular neuritis and AICA stroke, or between Wallenberg and an isolated cerebellar infarct.

normal

Head impulse

0100200300400time (ms)velocity (°/s)
VOR gain 0.95 — within normal range

Nystagmus

No spontaneous nystagmus

Reference. Intact VOR (no corrective saccade), no spontaneous nystagmus, absent skew.

Skew
Absent
HINTS-plus (auditory)
No new auditory symptoms

→ Normal findings module

peripheral

Head impulse

0100200300400time (ms)velocity (°/s)
VOR gain 0.40 — corrective saccade present

Nystagmus

position (°)
Unidirectional horizontal-torsional — peripheral pattern

Classic peripheral HINTS triad — abnormal head impulse toward the affected side, unidirectional nystagmus beating away, absent skew.

Skew
Absent
HINTS-plus (auditory)
No new auditory symptoms

→ Vestibular neuritis module

How to read the panels

Each panel shows two figures: a head-impulse velocity trace at the top, and an animated nystagmus eye with its position trace below. The head-impulse plot superimposes the head velocity (dashed black), the eye velocity (teal), and — when VOR gain falls below 0.8 — the corrective saccade (amber). The nystagmus animation runs at the real-time beat frequency for the pattern; the cursor sweeps under the position trace in sync.

The summary box under each pair of figures lists the skew and HINTS-plus status. The key-discriminators card at the bottom of the page distils the contrast in one line per dimension that differs.