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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
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Menstrual cycle and the temporal discrimination threshold.

Eavan M Mc Govern1, Emer O'Connor, Ines Beiser

  • 1Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland. School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland. Trinity Centre for Bioengineering, Dublin, Ireland.

Physiological Measurement
|January 19, 2017
PubMed
Summary
This summary is machine-generated.

Temporal discrimination threshold (TDT) in women does not change during the menstrual cycle. This suggests hormonal fluctuations are not the cause of age-related TDT decline, a factor in adult onset isolated focal dystonia.

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Area of Science:

  • Neuroscience
  • Biomarkers
  • Dystonia Research

Background:

  • Temporal discrimination threshold (TDT) is a potential biomarker for adult onset isolated focal dystonia (AOIFD).
  • Women exhibit faster TDTs before age 40, but TDTs worsen significantly with age, unlike men.
  • AOIFD prevalence increases in women post-40, raising questions about hormonal or chromosomal influences on TDT sex differences.

Purpose of the Study:

  • To investigate if physiological hormonal changes during the menstrual cycle impact TDT in healthy women.
  • To explore the relationship between menstrual cycle phase and TDT performance.

Main Methods:

  • 14 healthy female volunteers participated.
  • Temporal discrimination was assessed weekly over two menstrual cycles.
  • Data were analyzed for significant differences and correlations with cycle stage.

Main Results:

  • No significant weekly variations in TDT were observed throughout the menstrual cycles.
  • TDT performance showed no significant correlation with menstrual cycle stage.
  • Temporal discrimination remained stable despite cyclical hormonal fluctuations.

Conclusions:

  • Menstrual cycle hormonal changes do not appear to influence temporal discrimination in healthy women.
  • The stability of TDT during the menstrual cycle raises questions about the mechanisms behind age-related, sex-specific TDT decline.
  • Further research is needed to understand the pathomechanisms of age-related TDT deterioration relevant to AOIFD.