[Functional differences between superior and inferior visual hemifields obtained with non-structural stimuli]. / Differenze funzionali tra emicampi visivi superiore ed inferiore per stimoli non strutturati.

ABSTRACT

Functional differences between superior and inferior visual hemifields to dot stimuli projected at 5 degrees and 20 degrees from the horizontal meridian, have been studied in 10 subjects. The reaction time method (uncrossed response only) has been employed, by projecting the dot stimuli in each quadrant. The reaction time at 5 degrees is the same in the 4 quadrants, but it increases in each quadrant at 20 degrees stimulation; at 20 degrees a greater speed of the superior hemiretina also results.