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Related Experiment Video

Updated: Jul 19, 2026

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm

Published on: April 28, 2020

Evolution of subjective visual vertical perturbation after stroke.

I V Bonan¹, M C Leman, J F Legargasson

¹Department of Physical Medicine and Rehabilitation, Groupe Hospitalier Lariboisière-F. Widal, Paris, France. isabelle.bonan@lrb.ap-hop-paris.fr

Neurorehabilitation and Neural Repair

|November 4, 2006

Summary

Stroke patients often experience disrupted visual verticality perception, impacting balance. Recovery is linked to lesion side, with left-hemisphere strokes showing better visual verticality normalization.

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Last Updated: Jul 19, 2026

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Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

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Published on: August 22, 2025

Area of Science:

Neuroscience
Clinical Neurology
Rehabilitation Medicine

Background:

Perception of visual verticality is frequently impaired post-stroke, contributing to balance deficits.
Understanding the factors influencing visual verticality recovery is crucial for effective rehabilitation.

Purpose of the Study:

To characterize the temporal evolution of visual verticality (VV) disturbances after stroke.
To identify demographic and lesion-related factors influencing VV perturbation and recovery.

Main Methods:

Thirty hemiplegic stroke patients (17 left-lesioned, 13 right-lesioned) were assessed for VV at baseline, 3 months, and 6 months post-stroke.
VV was measured by asking patients to align a luminous rod to the vertical in a dark room.
Lesion laterality, size, type, and location were analyzed for their impact on VV evolution.

Main Results:

60% of patients exhibited initial VV inaccuracies; 39% recovered within 3 months.
The side of the lesion significantly influenced VV recovery (P=0.01), with left-lesioned patients demonstrating better normalization.
Lesion size, type, or location did not affect VV normalization.

Conclusions:

Left-hemisphere stroke patients show a better recovery of visual verticality perception compared to right-hemisphere stroke patients.
The right hemisphere's role in spatial cognition may explain poorer VV recovery and subsequent balance deficits in right-lesioned patients.