Color perception is mediated by a plastic neural mechanism that is adjustable in adults.
An intensely debated issue concerning visual-experience-dependent neural plasticity is whether experience is required only to maintain function or whether information from experience is used actively, relieving the necessity to hard-wire all connections and allowing adaptive adjustments. Here, an active role for experience is demonstrated in circuits for color vision. Chromatic experience was altered using colored filters. Over days there was a shift in color perception, as measured by the wavelength of unique yellow, which persisted 1-2 weeks after the filters were discontinued. Moreover, color-deficient adults were shown to have altered weightings of inputs to chromatic channels, demonstrating a large neural adjustment to their inherited photopigment defect. Thus, a neural normalization mechanism for color perception, determined by visual experience, operates to compensate for large genetic differences in retinal architecture and for changes in chromatic environment.
Neitz
Jay
J
Department of Cell Biology, Neurobiology, and Anatomy, Milwaukee, WI 53226, USA.
Carroll
Joseph
J
Yamauchi
Yasuki
Y
Neitz
Maureen
M
Williams
David R
DR
D000222:Adaptation, Physiological / Q000502:physiology; D000328:Adult; D002452:Cell Count; D003118:Color Perception / Q000502:physiology*; D005260:Female; D014644:Genetic Variation / Q000502:physiology; D006801:Humans; D008297:Male; D009473:Neuronal Plasticity / Q000502:physiology*; D010775:Photic Stimulation; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000737:chemistry / Q000235:genetics; D012727:Sex Characteristics; D014785:Vision, Ocular / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*
D012168:Retinal Pigments