A Spectrum of Colors: Investigating the Temporal Frequency\ud Characteristics of the Human Visual System Using a System\ud Identification Approach

摘要

Noise input signals are commonly used in both linear\udand nonlinear system identification of physiological systems.\udThis method can be applied to electrophysiological analysis of\udthe human visual system by controlling the modulation of the\udcontrast of a checkerboard stimulus using a pre-computed noise\udwaveform. In this study we describe how one can obtain an\udestimate of the linear impulse response of the visual system\udusing noise waveforms. Furthermore, we examine the impulse\udresponses obtained using noise signals with different frequency\udcharacteristics, in an attempt to investigate the temporal frequency\udcharacteristics of the human visual system. We show\udthat noise signals with frequency content greater than 15 Hz\udare more effective at evoking these responses than those with\udlittle or no power at high frequencies.