Abstract
There are two main electrophysiological measures of visual cortical responses: frequency of action potentials (spikes) and amplitude of slow potentials. Spikes are recorded with a microelectrode from single units, or groups of units. Slow field potentials (FP) can be recorded by the same microelectrode, or with another (local) macroelectrode. Another type of recording, occipital visual evoked potential (VEP), reflects global cortical activity and can be used in human as well as animal experiments. Although each of these electrophysiological responses is a different measure of visual cortical activity, and may reflect different neural processes (thereby providing complementary information about the visual system), all of them can be shown to have a general link with psychophysical thresholds, provided that visual stimuli are suitably chosen.
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Kulikowski, J.J. (1991). On The Nature of Visual Evoked Potentials, Unit Responses and Psychophysics. In: Valberg, A., Lee, B.B. (eds) From Pigments to Perception. NATO ASI Series, vol 203. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3718-2_25
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DOI: https://doi.org/10.1007/978-1-4615-3718-2_25
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