title: Spatial properties of L- and M-cone driven incremental (On-) and decremental (Off-) electroretinograms: evidence for the involvement of multiple post-receptoral mechanisms.
abstract: An overview of electroretinogram response components to incremental and decremental steps in L- and M-cone excitation was obtained in human observers, while varying the spatial properties of the stimulus. Responses to L- and M-cone stimuli of opposite polarity resembled each other, particularly within the central 35° of the retina. All amplitudes grew as stimulus size increased; however, earlier and later components of the On- and Off-responses showed differing degrees of dependency on stimulus size. Thus, they may reflect different proportions of responses originating in parvocellular (less stimulus size-dependent) and magnocellular (more stimulus size-dependent) streams.
authors.forename: Tina I
authors.initials: TI
authors.lastname: Tsai
authors.forename: Mellina M
authors.initials: MM
authors.lastname: Jacob
authors.forename: Declan
authors.initials: D
authors.lastname: McKeefry
authors.forename: Ian J
authors.initials: IJ
authors.lastname: Murray
authors.forename: Neil R A
authors.initials: NR
authors.lastname: Parry
authors.forename: Jan
authors.initials: J
authors.lastname: Kremers
mesh_terms: D000328:Adult; D004596:Electroretinography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D017949:Retinal Cone Photoreceptor Cells / Q000166:cytology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult