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Updated: Jul 16, 2026

Assessment of Spatial Lingual Tactile Sensitivity using a Gratings Orientation Test

Assessment of Spatial Lingual Tactile Sensitivity using a Gratings Orientation Test

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A simple method for evaluation of tongue position.

S Tsuiki¹, S Handa, K Ohyama

¹Japan Foundation for Neuroscience and Mental Health, Tokyo, Japan. tsuiki@somnology.com

Journal of Oral Rehabilitation

|March 21, 2007

Summary

Neck extension causes a lower tongue position in congenital myopathy (CM) patients. This study found that neck extension in healthy individuals also lowers tongue position, suggesting a potential diagnostic indicator.

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Area of Science:

Neurology
Biomechanics
Physiology

Background:

Congenital myopathy (CM) patients exhibit a lower tongue position due to cervical extensor muscle contraction and jaw opening.
Understanding the biomechanics of tongue positioning is crucial for diagnosing and managing CM.

Observation:

A novel method using pressure sensors evaluated tongue position by measuring pressure on maxillary molars.
Measurements were taken on a CM patient and four control subjects in natural head and neck-extended positions.

Findings:

In CM patients, neck extension eliminated tongue pressure on the molar, indicating no tongue-molar contact.
Control subjects showed reduced tongue and buccal pressures during neck extension, with a more significant decrease in tongue pressure.
These results suggest neck extension mimics the tongue positioning observed in CM patients.

Implications:

Neck extension may serve as a reproducible model to study tongue positioning in congenital myopathy.
Pressure sensor technology offers a potential tool for evaluating tongue position.
Further research is needed to validate these findings and explore clinical applications.