Human VEPs to isoluminant chromatic and achromatic sinusoidal gratings: Separation of parvocellular components

Shozo Tobimatsu, Hiroyuki Tomoda, Motohiro Kato

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

To extract the responses specific to the parvocellular system (color vision and form perception) in humans, visual evoked potentials (VEPs) in response to the onset of isoluminant chromatic (red-green) and achromatic (black-white) sinusoidal gratings were recorded in 15 young adults. Chromatic stimulation evoked a characteristic negative wave (N1) with peak latencies around 120 msec. The amplitude resembled an inverse U-shaped function against the spatial frequency with a peak at 2 c/deg. In contrast, VEPs to achromatic gratings showed different spatial frequency characteristics with a peak at 5.3 c/deg. With variations in the luminous intensity ratio between the red and green gratings, N1 was seen to respond maximally to isoluminant stimulation. These results indicate that the combined use of isoluminant chromatic and achromatic patterns could stimulate the parvocellular system selectively in humans.

Original languageEnglish
Pages (from-to)241-243
Number of pages3
JournalBrain Topography
Volume8
Issue number3
DOIs
Publication statusPublished - May 24 1996

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Clinical Neurology

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