Abstract
Purpose: To determine a psychophysiological basis for age visual sensitivity to chromatic and achromatic stimuli. Methods: We investigated the effects of achromatic and four isoluminant color combinations (blue/red, blue/green, green/red, and blue/yellow), luminance ratio changes in color combinations (blue/red; 1:1, 3:4, 4:3) and contrast changes (3 to 100%) on steady-state electroretinograms (ERGs) and visual evoked potentials (VEPs) in 32 healthy teenagers and 30 young adults. Results: We found that (1) dual peaks at 9 and 18 Hz with a dip at 12 Hz were observed in VEPs with all isoluminant color combinations, (2) VEP responses were significantly enhanced and the 12-Hz dip became unclear with luminance ratio changes between two colors with a nonantagonistic relationship (blue/red), and (3) VEP amplitudes were significantly increased when the contrast was increased. These characteristics were more evident in teenagers than young adults; however, ERGs were qualitatively similar between the two groups. Discussion: The visual cortex is differently modulated by different color-luminance combinations, and higher sensitivity to color-luminance combinations in the visual cortex in teenagers is responsible for the high prevalence of photo/chromatic sensitivity in adolescence.
| Original language | English |
|---|---|
| Pages (from-to) | 1611-1618 |
| Number of pages | 8 |
| Journal | Epilepsia |
| Volume | 49 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 1 2008 |
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All Science Journal Classification (ASJC) codes
- Neurology
- Clinical Neurology
Cite this
Neural basis of photo/chromatic sensitivity in adolescence. / Yamasaki, Takao; Goto, Yoshinobu; Kinukawa, Naoko; Tobimatsu, Shozo.
In: Epilepsia, Vol. 49, No. 9, 01.09.2008, p. 1611-1618.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Neural basis of photo/chromatic sensitivity in adolescence
AU - Yamasaki, Takao
AU - Goto, Yoshinobu
AU - Kinukawa, Naoko
AU - Tobimatsu, Shozo
PY - 2008/9/1
Y1 - 2008/9/1
N2 - Purpose: To determine a psychophysiological basis for age visual sensitivity to chromatic and achromatic stimuli. Methods: We investigated the effects of achromatic and four isoluminant color combinations (blue/red, blue/green, green/red, and blue/yellow), luminance ratio changes in color combinations (blue/red; 1:1, 3:4, 4:3) and contrast changes (3 to 100%) on steady-state electroretinograms (ERGs) and visual evoked potentials (VEPs) in 32 healthy teenagers and 30 young adults. Results: We found that (1) dual peaks at 9 and 18 Hz with a dip at 12 Hz were observed in VEPs with all isoluminant color combinations, (2) VEP responses were significantly enhanced and the 12-Hz dip became unclear with luminance ratio changes between two colors with a nonantagonistic relationship (blue/red), and (3) VEP amplitudes were significantly increased when the contrast was increased. These characteristics were more evident in teenagers than young adults; however, ERGs were qualitatively similar between the two groups. Discussion: The visual cortex is differently modulated by different color-luminance combinations, and higher sensitivity to color-luminance combinations in the visual cortex in teenagers is responsible for the high prevalence of photo/chromatic sensitivity in adolescence.
AB - Purpose: To determine a psychophysiological basis for age visual sensitivity to chromatic and achromatic stimuli. Methods: We investigated the effects of achromatic and four isoluminant color combinations (blue/red, blue/green, green/red, and blue/yellow), luminance ratio changes in color combinations (blue/red; 1:1, 3:4, 4:3) and contrast changes (3 to 100%) on steady-state electroretinograms (ERGs) and visual evoked potentials (VEPs) in 32 healthy teenagers and 30 young adults. Results: We found that (1) dual peaks at 9 and 18 Hz with a dip at 12 Hz were observed in VEPs with all isoluminant color combinations, (2) VEP responses were significantly enhanced and the 12-Hz dip became unclear with luminance ratio changes between two colors with a nonantagonistic relationship (blue/red), and (3) VEP amplitudes were significantly increased when the contrast was increased. These characteristics were more evident in teenagers than young adults; however, ERGs were qualitatively similar between the two groups. Discussion: The visual cortex is differently modulated by different color-luminance combinations, and higher sensitivity to color-luminance combinations in the visual cortex in teenagers is responsible for the high prevalence of photo/chromatic sensitivity in adolescence.
UR - http://www.scopus.com/inward/record.url?scp=51249109244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51249109244&partnerID=8YFLogxK
U2 - 10.1111/j.1528-1167.2008.01605.x
DO - 10.1111/j.1528-1167.2008.01605.x
M3 - Article
C2 - 18410364
AN - SCOPUS:51249109244
VL - 49
SP - 1611
EP - 1618
JO - Epilepsia
JF - Epilepsia
SN - 0013-9580
IS - 9
ER -