Abstract：
UNLABELLED:The middle latency response (MLR) to an acoustic stimulus occurs between 10 and 80 ms. The waveform is characterized by a series of peaks and troughs labeled N0, P0, Na, Pa, Nb and Pb. Certain acoustic stimuli may excite specific cochlear areas in contrast with clicks, that activate the cochlea between 1000 and 4000 Hz. The logon stimulus activates segmentar areas of the cochlea and has advantages over clicks when assessing low frequency areas of the cochlea (below 1 kHz). AIM:The aim of this paper was to study the MLR electrophysiologic response when activated by logon stimuli at 500, 1000 and 2000 Hz. METHOD- a prospective and descriptive study. 14 female volunteers had normal otology and conventional audiology results. The stimulus was monoaural and ipsilateral (Cz/A1-2). RESULTS:the NaPa complex was readily identified compared to other complexes and was present in 100% of the tests done at 2000 Hz, and in 96.4% of the tests done at 500 and 1000 Hz. CONCLUSION:the logon stimulus at 500, 1000 and 2000 Hz elicits MLRs; the NaPa complex was the most frequent event and the 2000 Hz frequency elicited more responses than other frequencies.
journal_name
Braz J Otorhinolaryngoljournal_title
Brazilian journal of otorhinolaryngologyauthors
Fukushima EM,Penteado de Castro N Jrdoi
10.1016/s1808-8694(15)30073-2subject
Has Abstractpub_date
2007-05-01 00:00:00pages
308-14issue
3eissn
1808-8694issn
1808-8686pii
S1808-8694(15)30073-2journal_volume
73pub_type
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journal_title：Brazilian journal of otorhinolaryngology
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章,评审
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pub_type： 杂志文章
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
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更新日期：2011-06-01 00:00:00
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
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更新日期：2010-03-01 00:00:00
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pub_type： 杂志文章
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更新日期：2015-11-01 00:00:00
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章,评审
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更新日期：2016-01-01 00:00:00
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pub_type： 杂志文章,评审
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pub_type： 杂志文章
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更新日期：2015-07-01 00:00:00
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
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更新日期：2009-11-01 00:00:00
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journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
doi：
更新日期：2010-07-01 00:00:00
abstract：UNLABELLED:Children with language or learning impairment and normal hearing need phoniatric assessment to analyse various communication and development aspects targeting the differential diagnosis and therapeutic indications. OBJECTIVE:Characterize clinical and epidemiological features of a pediatric population treate...
journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
doi：10.5935/1808-8694.20130029
更新日期：2013-03-01 00:00:00
abstract：UNLABELLED:The immunodeficiency state in HIV infected patients has been the cause of severe episodes of Recurrent Aphthous Stomatitis (RAS). AIM:Our study aims to establish correlation between the manifestations of RAS and the immunosuppression state caused by HIV infection, through counting of CD4+ cells, CD8+ cells,...
journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
doi：10.1016/s1808-8694(15)31209-x
更新日期：2005-07-01 00:00:00
abstract：UNLABELLED:Tympanoplasty is done to eradicate ear pathology and to restore the conductive hearing mechanism (eardrum and ossicles). Some patients, however, do not tolerate tinnitus and question physicians about the results of surgery when tinnitus persists. AIM:to evaluate the progression of tinnitus in patients with ...
journal_title：Brazilian journal of otorhinolaryngology
pub_type： 杂志文章
doi：10.1016/s1808-8694(15)30083-5
更新日期：2007-05-01 00:00:00
