The latencies of MLAEP waves (Na, Pa, and Nb) of the auditory-evoked potentials of the two groups were compared.
Based on the years of usage, the mean values of absolute latencies of MLAEP waveforms Na, Pa, and Nb, recorded from the right and left sides, showed strongly significant difference between the two groups, with the long-term users having an increased latency period compared to the short-term users, as shown in Table 2.
Based on the duration of usage per day, the mean values of absolute latencies of MLAEP waveforms Na, Pa, and Nb, recorded from the right and left sides, showed strongly significant differences between the two groups, with Group B having an increased latency period compared to Group A [Table 3].
In this study, an increase in MLAEP latencies (Na, Pa, and Nb) is noted in long-term mobile phone users, suggesting a delay in the conduction of auditory impulses from the level of the medial geniculate body to the auditory cortex.
The neural generators of MLAEP waveforms are as follows: Na--subcortical generators such as the medial geniculate body and polysensory thalamic nuclei located in the brainstem, Pa and Nb - cortical generators such as the primary auditory cortex and adjacent areas.
on individuals who have been using mobile phone for more than 1 year duration showed a bilateral lower MLAEP amplitude response.
In terms of latency response, this is the first study done to analyze the effect of long-term exposure to mobile phone radiations on the latencies of MLAEP. Further MLAEP studies and brain neuroimaging techniques in a larger study group might provide substantial scientific evidence regarding the effects of the mobile phone radiations on the human auditory system.
The mean pattern of absolute latencies of MLAEPs (Na, Pa, and Nb) showed significant decrease in the blind when compared to the normal subjects.
The mean pattern of amplitude of MLAEPs (Na, Pa, Nb) did not show any significant difference between the two groups, except for Nb wave where it showed some significance which is in contrast to the study which showed that the peak amplitude of the Pa wave recorded from the occipital area of the congenitally blind individuals was significantly less than that of the normal sighted subjects, recorded from the same site.