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Human perioral directional sensitivity.

G K Essick1, T Afferica, B Aldershof

  • 1Department of Removable Prosthodontics, University of North Carolina, Chapel Hill 27514.

Experimental Neurology
|June 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study found that tactile motion sensitivity varies with brush speed, with peak sensitivity occurring at an optimal velocity. These findings differ between males and females, providing benchmarks for assessing orofacial nerve damage.

Area of Science:

  • Neuroscience
  • Sensory Physiology

Background:

  • Tactile motion sensitivity is crucial for orofacial function.
  • Understanding how velocity affects directional sensitivity is important for diagnosing neurological conditions.

Purpose of the Study:

  • To quantify directional tactile sensitivity across the skin innervated by the mental nerve.
  • To characterize the relationship between stimulus velocity and directional sensitivity (d').
  • To establish normative data for assessing orofacial tactile deficits.

Main Methods:

  • 41 healthy young adults participated.
  • Controlled brush motion velocity, orientation, length, and width.
  • Directional sensitivity (d') was measured across velocities from 0.5 to 32 cm/s.

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Main Results:

  • Directional sensitivity varied curvilinearly with velocity.
  • A generalized gamma function quantitatively described this velocity dependency.
  • Peak sensitivity, optimal velocity, and velocity-tuning differed between males and females.

Conclusions:

  • Velocity significantly influences orofacial tactile motion perception.
  • Normative data with confidence limits can aid in detecting deficits in mandibular nerve function.
  • Sex-based differences in tactile sensitivity warrant further investigation.