TENS effects on salivary stress markers: A pilot study

Area of Science:

• Neuroscience
• Physiology

Background:

• Transcutaneous electrical nerve stimulation (TENS) is recognized for pain relief via endorphin release.
• Emerging evidence links TENS to autonomic nervous system (ANS) modulation, observable through heart rate variability and other ANS markers.
• This pilot study investigates salivary alpha-amylase (sAA) as a stress biomarker in response to ultra-low frequency TENS (ULF-TENS).

Discussion:

• ULF-TENS may modulate stress responses, potentially through the activation of μ opioid receptors.
• Salivary alpha-amylase (sAA) levels exhibited statistically significant differences between men and women, independent of TENS intervention.
• The findings suggest a potential role for ULF-TENS in influencing sAA levels, a marker associated with sympathetic nervous system activity.

Key Insights:

• Salivary alpha-amylase (sAA) shows promise as a non-invasive biomarker for assessing autonomic nervous system (ANS) function.
• ULF-TENS intervention may impact stress markers, warranting further investigation into its physiological effects.
• Sex-based differences in sAA levels were observed, highlighting the need to consider gender in stress response research.

Outlook:

• Further research is needed to elucidate the precise mechanisms by which ULF-TENS influences sAA and the ANS.
• Exploring ULF-TENS for stress management and ANS regulation in clinical populations could be a future direction.
• Investigating the correlation between sAA changes and other established ANS markers under ULF-TENS stimulation will strengthen findings.