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Brainstem

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Related Experiment Video

Updated: Jun 28, 2025

Author Spotlight: Using Motor Imagery Brain-Computer Interface to Improve Motor and Cognitive Function in Stroke Patients

Author Spotlight: Using Motor Imagery Brain-Computer Interface to Improve Motor and Cognitive Function in Stroke Patients

Published on: September 1, 2023

Body representation after a stroke in the brainstem.

Chloé Émard-Lamy¹, Laura Bergé², Arnaud Saj³

¹Psychology Department, University of Montreal, Montreal, QC, Canada.

Journal of the Neurological Sciences

|April 23, 2024

Summary

Left brainstem strokes disrupt body orientation perception, causing postural tilt and balance issues. This highlights the brainstem's role in spatial awareness and suggests new rehabilitation strategies for stroke patients.

Keywords:

Body representation Brainstem stroke Neuroanatomy Vestibular nucleus

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Area of Science:

Neuroscience
Clinical Neurology
Vestibular System

Background:

Brainstem lesions can lead to postural tilt and balance disorders.
These deficits may stem from altered perception of body orientation.
Understanding the neuroanatomy of these disorders is crucial.

Purpose of the Study:

To investigate the effects of left (L-BS) and right (R-BS) brainstem strokes on body representation.
To correlate these effects with postural impairments and neuroanatomy.
To examine body representation in both horizontal and frontal planes.

Main Methods:

Compared 40 patients with L-BS or R-BS stroke to 15 control subjects (C).
Assessed subjective straight-ahead (SSA) using a method distinguishing lateral deviation and tilt.
Analyzed neuroanatomical correlates of observed deficits.

Main Results:

L-BS patients exhibited contralesional lateral deviation of SSA and ipsilesional tilt (trunk > head).
R-BS patients showed accurate body midline representation, similar to controls.
No significant difference in body representation between R-BS patients and controls.

Conclusions:

Left brainstem lesions cause asymmetric body representation, potentially linked to vestibular dominance.
This asymmetry may involve connections to the right cerebral hemisphere.
Findings offer new avenues for neuro-rehabilitation of post-stroke postural disorders by correcting body orientation representation.