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Does the network model fits neurophysiological abnormalities in blepharospasm?

Marcello Mario Mascia¹, Sabino Dagostino², Giovanni Defazio²

¹Department of Medical Sciences and Public Health, Neurology Unit, University of Cagliari and AOU Cagliari, Monserrato, 09042, Cagliari, Italy. marcello.mas@tiscali.it.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology

|March 28, 2020

Summary

This summary is machine-generated.

Blepharospasm may stem from widespread network dysfunction, not just basal ganglia issues. This involves abnormal sensory processing and reduced inhibition across brain regions.

Keywords:

Blepharospasm Neuroimaging Neurophysiology Physiopathology

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Area of Science:

Neuroscience
Neurology
Movement Disorders

Background:

Blepharospasm is characterized by neurophysiological abnormalities, including sensory processing deficits and loss of inhibition.
Traditionally, these changes were attributed to basal ganglia dysfunction.
Recent research suggests dystonia, including blepharospasm, may be a network disorder.

Purpose of the Study:

To explore the potential pathophysiological model of blepharospasm as a network disorder.
To investigate the role of cortical and brainstem pathways in blepharospasm.
To propose an alternative to the basal ganglia dysfunction hypothesis.

Main Methods:

Review of existing neurophysiological data on blepharospasm.
Analysis of sensorimotor pathway function.
Examination of sensory processing abnormalities.

Main Results:

Evidence suggests loss of inhibition at cortical and brainstem levels.
Abnormalities in sensory processing are evident in blepharospasm.
These findings align with a network dysfunction model.

Conclusions:

Blepharospasm likely involves a functional derangement of a complex neural network.
This network includes frontal and parietal cortical areas, basal ganglia, thalamus, and cerebellum.
A network disorder model offers a more comprehensive explanation for blepharospasm pathophysiology.