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Normative data for human postural vertical: A systematic review and meta-analysis.

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This study establishes reference values for the perception of verticality in healthy adults. It provides crucial data for understanding balance and postural control disorders.

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Area of Science:

  • Neuroscience
  • Human Physiology
  • Clinical Research

Background:

  • Accurate perception of verticality is essential for daily function and postural control.
  • Previous studies on Subjective Postural Vertical (SPV) in a seated position used small sample sizes, limiting their representativeness.
  • Vertical misperception is linked to functional deficits in stroke and vestibular disorder patients.

Purpose of the Study:

  • To establish a representative reference value for Subjective Postural Vertical (SPV) in healthy adults using a systematic review and meta-analysis.
  • To analyze the methodological variations in SPV assessment protocols across studies.

Main Methods:

  • Systematic literature search of Medline, EMBASE, and Cochrane libraries.
  • Meta-analysis of SPV data from eligible studies (n=337 frontal plane, n=187 sagittal plane).
  • Pooled mean and standard deviation used as effect size measures for SPV in frontal and sagittal planes.

Main Results:

  • Established mean reference values for SPV: 0.12°±1.49° (frontal plane) and 0.02°±1.82° (sagittal plane).
  • Demonstrated low variability in results, indicating representative reference values.
  • Found methodological differences did not significantly influence SPV assessment in healthy subjects.

Conclusions:

  • Provides reliable reference values for SPV in the seated position for healthy adults.
  • These values can serve as a benchmark for clinical studies investigating disorders of verticality and postural control.
  • Highlights the need for standardized SPV assessment in clinical practice.