Neurology -- Thurtell et al. 70 (23): e96 Figure 117

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Figure 1 Three-dimensional search-coil recordings of the patient's nystagmus

The patient is attempting to fixate leftward (A), central (B), and rightward (C) targets (Fix), indicated by arrowheads next to the horizontal traces. The traces show leftward-upward-counterclockwise jerk nystagmus (A), alternating-direction horizontal-torsional jerk nystagmus with extended foveation (B), and rightward-upward-clockwise jerk nystagmus with extended foveation (C). Each nystagmus slow phase increases in velocity with time. Positive directions are rightward, upward, and clockwise, as indicated.