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Updated: Jul 17, 2026
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Stochastic Noise Application for the Assessment of Medial Vestibular Nucleus Neuron Sensitivity In Vitro
Published on: August 28, 2019
Balance control in Sensory Neuron Disease
Antonio Nardone1, Massimo Galante, Davide Pareyson
1Posture and Movement Laboratory, Division of Physical Therapy and Rehabilitation, Fondazione Salvatore Maugeri (IRCCS), Scientific Institute of Veruno, I-28010 Veruno (Novara), Italy. anardone@fsm.it
Summary
Patients with Sensory Neuron Disease (SND) exhibit significant balance issues in static and dynamic situations, especially with eyes closed. This instability is linked to abnormal muscle response latencies, indicating central sensory pathway degeneration.
Area of Science:
- Neuroscience
- Neurology
- Human Physiology
Background:
- Sensory Neuron Disease (SND) affects nerve cells, potentially impacting balance control.
- Ataxia, a key symptom of neurological disorders, involves impaired coordination and balance.
- Understanding the pathophysiology of ataxia in SND is crucial for diagnosis and management.
Purpose of the Study:
- To assess static and dynamic balance control in patients with Sensory Neuron Disease (SND).
- To investigate the relationship between balance deficits and the pathophysiology of ataxia in SND.
- To differentiate balance control impairments in SND from those in diabetic polyneuropathy.
Main Methods:
- Clinical and neurophysiological evaluations were performed on 11 SND patients and 14 diabetic polyneuropathy patients.
- Stabilometric recording assessed body sway during quiet stance (with/without vision).
- Stereometric analysis and EMG recorded responses to dynamic platform translation and stance perturbations.
Main Results:
- SND patients showed greater body sway in static stance and more oscillation in dynamic conditions compared to diabetic patients.
- Abnormal, disproportionately increased long-loop EMG response latencies to stance perturbations were observed in SND patients.
- Vestibular dysfunction was present in some SND patients, but increased response latencies were not solely attributed to this deficit.
Conclusions:
- SND patients exhibit severe unsteadiness, particularly with eyes closed, linked to patchy sensory loss affecting afferent pathways.
- Ataxia in SND is correlated with abnormal muscle response latencies, suggesting central sensory fiber degeneration as a primary cause.
- Balance assessments provide diagnostic insights into ataxia severity and the integrity of sensory pathways in neurological disorders.
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