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Related Experiment Video

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Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

Developmental plasticity connects visual cortex to motoneurons after stroke.

Anna Basu¹, Sara Graziadio, Martin Smith

¹Developmental Neuroscience, Institute of Neuroscience, Newcastle University, Newcastle Upon Tyne, UK.

Annals of Neurology

|February 27, 2010

Summary

This summary is machine-generated.

Early stroke can reroute motor control. In one patient, the left occipital cortex controlled right hand muscles, demonstrating significant brain plasticity.

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Area of Science:

Neuroscience
Neuroplasticity
Stroke Rehabilitation

Background:

Developmental strokes can lead to significant neurological deficits.
Understanding brain plasticity is crucial for developing effective rehabilitation strategies.
The adult brain exhibits remarkable capacity for functional reorganization.

Observation:

A patient with a left middle cerebral artery stroke exhibited motor function in the left occipital cortex.
Transcranial magnetic stimulation (TMS) applied to the left occipital cortex elicited right hand muscle contractions.
Electroencephalography (EEG) revealed functional connectivity between the left occipital cortex and right hand muscles.

Findings:

The left occipital cortex demonstrated sensorimotor activity, including Mu rhythm suppression during muscle contraction.
EEG-EMG coherence confirmed functional coupling between the occipital cortex and the target muscle.
This case provides evidence for the respecification of subcortically projecting pathways' cortical origin.

Implications:

Cortical plasticity can extend to the functional reorganization of motor pathways originating from atypical cortical areas.
This finding challenges traditional views of somatotopic organization and motor control after early-onset stroke.
Further research into occipital cortex motor function could inform novel therapeutic interventions for stroke recovery.