Author/Editor		Bucik, V
Title		An attempt at determination of the chemical processing time in retina by subjective equalization of stimulus intensity
Type		članek
Source		Rev Psihol
Vol. and No.		Letnik 20, št. 1-2
Publication year		1990
Volume		str. 11-17
Language		eng
Abstract		The results of previous studies indicate that when an eye is inadequately stimulated with paraliminal electrical pulses, photochemical phase in human retina is at least partially bypassed and that electrical pulses directly excite neural structures in the retina or immediately behing it. In this experiment a group of psychophysical procedures was applied, due to which, the time required for light energy transformation into a nerve impulse through photochemical processes in rods and cones could perhaps be evaluated. Adequate and inadequate stimuli were subjectively equalized by the determination of Point of Subjective Equality with the Method of limits and the Method of constatn stimuli. Mean simple RT for inadequate stimuli were about 40 ms shorter than RT for subjective equalized adequate stimuli. Is seems that we could attribute a large amount of this difference to transduction of light energy to the nerve impulse and its transduction through retinal structures, that is at the periphery of visual path. However, the presented model can not assure the exact conclusion, that this difference is exclusively the consequence of the photochemical preocesses in the synapses between receptor and bipolar cells
Descriptors		RETINA REACTION TIME PSYCHOPHYSICS PHOTIC STIMULATION SENSORY THRESHOLDS ADULT