ERG (Electroretinogram) Implicit Time: An Exploration of High Frequency Wavelets Recorded in the Human Visual System.
Final rept. 10 May 79-9 May 83,
PENNSYLVANIA COLL OF OPTOMETRY PHILADELPHIA HAFTER VISION RESEARCH LAB
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Previous research by the author had demonstrated that the spectral sensitivity of the visual system as measured by the visual evoked potential from the human scalp exhibited discrepancies from the spectral sensitivity function as measured by psychophysical techniques. These discrepancies were in the short wavelength blue region of the visible spectrum. Such discrepancies were explained by the discovery that blue lights evoked cortical potentials with longer latencies and implicit times than lights which stimulate the middle and long wavelength sensitive mechanisms. The current research deals with a further elucidation of this finding, by studying the fast wavelets oscillatory potentials arising in the retina and measured by means of the electroretinogram. High frequency wavelets were also observed at the scalp in the visual evoked potential.
- Anatomy and Physiology