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[Problems in the clinical use of steady state response]
EEG-EMG Zeitschrift Fur Elektroenzephalographie, Elektromyographie Und Verwandte Gebiete
|March 1, 1985
Summary
Steady State Response (SSR) is a permanent evoked activity from frequent stimulation. This study found SSR is reliably detected after the 4th stimulus, but its type and amplitude vary with intensity and alpha-frequency, limiting clinical use.
Area of Science:
- Neuroscience
- Physiology
Context:
- The Steady State Response (SSR) is a neurophysiological phenomenon characterized by continuous evoked activity.
- Understanding SSR parameters is crucial for its application in brain activity assessment.
Purpose:
- To investigate the influence of stimulation intensity and frequency on Steady State Response (SSR) configuration.
- To evaluate the reliability and variability of SSR in healthy individuals.
Summary:
- Light flashes at 8 c/s were used to elicit SSR in 23 healthy boys.
- SSR was observed in 87% of participants at high intensity (1.2 Joule).
- A consistent SSR pattern emerged after the 3rd-4th stimulus, with four detectable types, showing slight correlation with alpha-frequency.
Impact:
- SSR amplitude enhancement with intensity was inconsistent (50% of cases).
- Changes in SSR type were observed in 5 participants.
- The inherent variability of SSR in healthy individuals suggests caution for widespread clinical application.