ABSTRACT
It is knows that spontaneous nystagmus [SN] and positional nystagmus [PN] which is seen in many ophthalmologic and neurological diseases may also appear in healthy individuals. This study was made to find out the prevalence of slow phase velocity [SPV] upper limit of SN and PN in normal subjects in Turkish population using electronystagmographic [ENG] recording system. Bitemporal horizontal ENG recordings were obtained from 107 healthy subjects using three Ag/AgCl disc electrodes connected to ENG amplifier of the Nihon Kohden RM-600 polygraph system via the ENG input box and ENG input panel. In healthy subjects we found that the prevalence of SN was 13%, the upper limit of SN SPV was 4.4. deg/sec, the prevalence of PN was 27.1% and the upper limit of PN SPV was 5.6 deg/sec
Subject(s)
Humans , Male , Female , Electronystagmography , Eye MovementsABSTRACT
The present study obtained saccadic eye movements form 25 right-handed normal subjects [aged 18 to 35 yrs., mean 22.4 yrs], to examine the effects of saccade direction on the saccadic parameters [latency, duration and average velocity]. The binocular saccadic eye movement were recorded with a direct-current electro-oculographic system, and analysis was performed on a laboratory digital computer. The LED larget positions were randomly selected 10, 15, 20, 25 and 30 degrees to the left or the right of the fixation points. Generally, mean values of the saccadic parameters over a large saccade angles were in agreement with those previously reported. These were no significant difference between saccades directed to the right and the left when all saccadic parameters were analyzed statistically