ACNS 2012 terminology

ACNS 2012 Terminology


Rhythmic or Periodic Patterns

Rhythmic or periodic patterns

All terms consist of main term # 1 followed by #2, with modifiers added as appropriate.


Main Term 1

  • Generalized (G)
  • Lateralized (L)
  • Bilateral Independent (BI)
  • Multifocal (Mf)

    • Main Term 2

  • Periodic Discharges (PD)
  • Rhythmic Delta Activity (RDA)
  • Spike or Sharp and Wave (SW)

    • Modifiers

  • Prevalence
  • Duration
  • Frequency
  • Number of phases
  • Sharpness
  • Amplitude
  • Polarity
  • Stimulus-Inducing (SI)
  • Evolving OR Fluctuating
  • Plus (+)

    • Minor Modifiers

  • Quasi-
  • Sudden OR gradual onset
  • Triphasic morphology
  • A-P or P-A lag
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    Atlas of Adult Electroencephalography
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