Alphen, B. van

contrast stimulus movement contrast sensitivity response mouse sensitivity frequency marker 0.2 velocity 0.4 c 57bl mice 0.5 stimuli eye movements vision optokinetic rotation effect pupil optokinetic eye movements system signi position animal 0.6 0.8 vision res difference contrast sensitivity function okr gains image method 0.3 0.1 recording pitch alphen camera 0.17 cyc /deg group signi ficantly zeeuw ci dif ficult j neurophysiol eye velocity optomotor rabbit fi eld 0.42 cyc /deg decrease study l 7-pkci mutants eye movement phase setup direction roll stimuli pilocarpine 7-pkci stimulus frequency center function j comp neurol matrix retina acuity stimulus velocities point ficant torsional image motion result grating stimulus conditions cycle mutant 0.17 experiment