CPT, the main test method of skin neuronal sensitivity

Area of Science:

• Dermatology
• Neuroscience
• Sensory Science

Background:

• Sensitive skin research often overlooks increased neuronal sensitivity.
• Focus on skin barrier disruption is common, but neuronal aspects are less explored.

Purpose of the Study:

• To evaluate Current Perception Threshold (CPT) for quantifying skin neuronal sensitivity.
• To combine CPT with stinging tests for a comprehensive assessment.

Main Methods:

• Applied 10% lactic acid to nasolabial folds.
• Measured stinging response, Current Perception Threshold (CPT), and transepidermal water loss (TEWL).
• Grouped subjects based on lactic acid response.

Main Results:

• Positive correlation found between pre-stinging CPT and clinical scores.
• Shortened stinging onset time correlated with decreased CPT and increased TEWL.
• CPT measurements showed variability based on stinging response.

Conclusions:

• Stinging onset time indicates varying degrees of skin susceptibility.
• Current Perception Threshold (CPT) is a valuable tool for quantifying skin neuronal sensitivity.
• CPT measurements offer objective data for sensitive skin assessment.