Effect of frequency difference and intensity difference on mismatch negativity change in normal persons
- VernacularTitle:不同频率与强度差值对正常人错配负反应的影响
- Author:
Na ZHOU
;
Mingli GUO
;
Liming YU
;
Qiuju WANG
;
Mingquan WU
- Publication Type:Journal Article
- Keywords:
Adult;
Evoked Potentials;
Auditory Perception;
Neurophysiology
- From:
Chinese Archives of Otolaryngology-Head and Neck Surgery
2006;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To study the effect of frequency difference and intensity difference on mismatch negativity (MMN) change in normal persons. Emphatically to observe the effect on the latency and amplitude of normal people's MMN, as well as the threshold of the acoustic difference which may induce the MMN. METHODS Twenty-four adults were included in this study. Their thresholds of pure tone audiometry were within 20dBHL. The MMN were measured by using the Smart EP ( ear potentiometer provided by the company of Intelligent Hearing) and the rule of the change by the difference of frequency and intensity to the latency and amplitude of normal people’s MMN were studied. RESULTS Along with the decreasing of the difference of the frequency, the MMN latency prolonged gradually. The amplitude of the MMN decreased gradually as the decreasing of the intensity difference. CONCLUSION A stable MMN graph is an important indicator of objective physiological test with hearing distinguish.
