RENATA MOTA MAMEDE CARVALLO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Faculdade de Medicina - Docente
LIM/34 - Laboratório de Ciências da Reabilitação, Hospital das Clínicas, Faculdade de Medicina
LIM/34 - Laboratório de Ciências da Reabilitação, Hospital das Clínicas, Faculdade de Medicina
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- Alteration of distortion product otoacoustic emission input/output functions in subjects with a previous history of middle ear dysfunction(2012) CAMPOS, Ualace De P.; SANCHES, Seisse G.; HATZOPOULOS, Stavros; CARVALLO, Renata M. M.; KOCHANEK, Krzysztof; SKARZYNSKI, HenrykBackground: The aim of this study was to investigate the effects of sub-clinical alterations on the amplitudes and slopes of the DPOAE input-output responses from subjects with previous history of middle ear dysfunction. Material/Methods: The study included 15 subjects with and 15 subjects without a history of otitis media in the last 10 years. All participants were assessed with acoustic immittance, pure-tone audiometry, and DPOAEs. For the later, I/O functions and I/O slopes were estimated at 1501, 2002, 3174, 4004 and 6384Hz. Results: No statistically significant differences were found between the 2 groups in terms of behavioral thresholds. The group with a previous history of middle ear dysfunction presented significantly lower mean DPOAE amplitudes at 2002, 3174 and 4004 Hz. In terms of DPOAE slopes, no statistically significant differences were observed at the tested frequencies, except at 3174 Hz. Conclusions: Middle ear pathologies can produce subclinical alterations that are undetectable with traditional pure-tone audiometry. The data from the present study show that reduced amplitude DPOAEs are associated with a previous history of middle ear complications. The corresponding DPOAE slopes were affected at only 1 tested frequency, suggesting that the cochlear non-linearity is preserved. Considering these results, it remains to be elucidated to what degree the DPOAE amplitude attenuation interferes with higher-order auditory tasks.
- A systematic review of mercury ototoxicity(2012) HOSHINO, Ana Cristina Hiromi; FERREIRA, Heloisa Pacheco; MALM, Olaf; CARVALLO, Renata Mamede; CAMARA, Volney MagalhaesMercury is neurotoxic, and numerous studies have confirmed its ototoxic effect. However, the diagnosis and follow-up of mercury exposure require understanding the pathophysiology of the chemical substance. Based on a systematic literature review, this study aimed to demonstrate whether mercury is ototoxic and to analyze its mechanism of action on the peripheral and central auditory system, in order to contribute to the diagnosis and follow-up of exposure. This was a systematic review of studies published on the effects of mercury exposure on the auditory system. The full text of the studies and their methodological quality were analyzed. The review identified 108 studies published on the theme, of which 28 met the inclusion criteria. All the articles in the analysis showed that mercury exposure is ototoxic and produces peripheral and/or central damage. Acute and long-term exposure produces irreversible damage to the central auditory system. Biomarkers were unable to predict the relationship between degree of mercury poisoning and degree of lesion in the auditory system.
article 14 Citação(ões) na Scopus From otoacoustic emission to late auditory potentials P300: the inhibitory effect(2012) SCHOCHAT, Eliane; MATAS, Carla Gentile; SAMELLI, Alessandra Giannella; CARVALLO, Renata Mota MamedeThis study verifies the effects of contralateral noise on otoacoustic emissions and auditory evoked potentials. Short, middle and late auditory evoked potentials as well as otoacoustic emissions with and without white noise were assessed. Twenty-five subjects, normal-hearing, both genders, aged 18 to 30 years, were tested. In general, latencies of the various auditory potentials were increased at noise conditions, whereas amplitudes were diminished at noise conditions for short, middle and late latency responses combined in the same subject. The amplitude of otoacoustic emission decreased significantly in the condition with contralateral noise in comparison to the condition without noise. Our results indicate that most subjects presented different responses between conditions (with and without noise) in all tests, thereby suggesting that the efferent system was acting at both caudal and rostral portions of the auditory system.- Processamento temporal de crianças com transtorno fonológico submetidas ao treino auditivo: estudo piloto(2012) VILELA, Nadia; WERTZNER, Haydée Fiszbein; SANCHES, Seisse Gabriela Gandolfi; NEVES-LOBO, Ivone Ferreira; CARVALLO, Renata Mota MamedePURPOSE: This study compared the temporal processing performance of children with phonological disorders submitted to formal and informal auditory training. METHODS: Fifteen subjects with phonological disorder (pure tone thresholds ≤20 dBHL from 0.50 to 4 kHz, and age between 7 years and 10 years and 11 months) were evaluated, divided into three groups: Control Group: five subjects (mean age 9.1 years) without auditory processing disorder, who passed through two evaluations of the auditory processing at intervals of six to eight weeks and without any intervention; Formal Training Group with five subjects (average 8.3 years) with auditory processing disorder submitted to eight sessions of formal training; and Informal Training Group, with five subjects (average 8.1 years) with auditory processing disorder submitted to eight sessions of informal training. RESULTS: After eight sessions the formal training group showed an improvement of 8% and the informal training group of 22.5% in comparison with the pitch pattern sequence test. For the duration pattern sequence test, the average of the formal training group improved by 12.9% and the informal training group by 18.7%. There was no statistical difference between the means obtained by both groups after intervention, neither in the pitch pattern nor in the duration pattern sequence test. CONCLUSION: Although the results did not present significant differences, this pilot study suggests that both formal and informal trainings provide improvement in the temporal processing abilities of children with phonological and auditory processing disorders.
- Ressonância da orelha média em lactentes: efeito da idade(2012) ANDRÉ, Karina Delgado; SANCHES, Seisse Gabriela Gandolfi; CARVALLO, Renata Mota MamedeINTRODUCTION: The resonant frequency is the probe frequency in which susceptance is 0 due to the neutralization of the forces of mass and stiffness components that control the middle ear. This frequency can be evaluated by multifrequency tympanometry, and the normality value for adults ranges 800-1,200 Hz. Studies about resonant frequency in children are scarce. AIM: Identify the variation of the resonant frequency in infants between the first days after birth and the third month of life. METHOD: Prospective study. Thirty newborns were evaluated at 2 different times: at the neonatal phase up to 12 days of life, and between 72 and 84 days of life. In the first evaluation, we carried out otoacoustic emissions and identified the resonant frequency, and identified the resonant frequency again in the second evaluation. RESULTS: In the first evaluation, we determined a mean resonance value of 250 Hz for both ears, while that in the second evaluation was 385 Hz. In both assessments, we found no significant differences between the ears. There was a significant difference between the first and second evaluation. CONCLUSION: The middle ear resonant frequency in infants is lower in the first days of life due to the influence of the mass component. The present study demonstrated that the resonance frequency increased in the first months of life.
- Electrophysiological study of hearing in full-term small-for-gestational-age newborns(2012) ANGRISANI, Rosanna Mariangela Giaffredo; AZEVEDO, Marisa Frasson De; CARVALLO, Renata Mota Mamede; DINIZ, Edna Maria de Albuquerque; MATAS, Carla GentilePURPOSE: To describe the Brainstem Auditory Evoked Potential (BAEP) results of full-term small-for-gestational-age newborns, comparing them to the results of full-term appropriate-for-gestational-age newborns, in order to verify whether the small-for-gestational-age condition is a risk indicator for retrocochlear hearing impairment. METHODS: This multicentric prospective cross-sectional study assessed 86 full-term newborns - 47 small- (Study Group) and 39 appropriate-for-gestational-age (Control Group - of both genders, with ages between 2 and 12 days. Newborns with presence of transient evoked otoacoustic emissions and type A tympanometry were included in the study. Quantitative analysis was based on the mean and standard deviation of the absolute latencies of waves I, III and V and interpeak intervals I-III, III-V and I-V, for each group. For qualitative analysis, the BAEP results were classified as normal or altered by analyzing these data considering the age range of the newborn at the time of testing. RESULTS: In the Study Group, nine of the 18 (38%) subjects with altered BAEP results had the condition of small-for-gestational-age as the only risk factor for hearing impairments. In the Control Group, seven (18%) had altered results. Female subjects from the Study Group tended to present more central alterations. In the Control Group, the male group tended to have more alterations. CONCLUSION: Full-term children born small or appropriate for gestational age might present transitory or permanent central hearing impairments, regardless of the presence of risk indicators.
- Audiological and electrophysiological assessment of professional pop/rock musicians(2012) SAMELLI, Alessandra G.; MATAS, Carla G.; CARVALLO, Renata M. M.; GOMES, Raquel F.; BEIJA, Carolina S. de; MAGLIARO, Fernanda C. L.; RABELO, Camila M.In the present study, we evaluated peripheral and central auditory pathways in professional musicians (with and without hearing loss) compared to non-musicians. The goal was to verify if music exposure could affect auditory pathways as a whole. This is a prospective study that compared the results obtained between three groups (musicians with and without hearing loss and non-musicians). Thirty-two male individuals participated and they were assessed by: Immittance measurements, pure-tone air conduction thresholds at all frequencies from 0.25 to 20 kHz, Transient Evoked Otoacoustic Emissions, Auditory Brainstem Response (ABR), and Cognitive Potential. The musicians showed worse hearing thresholds in both conventional and high frequency audiometry when compared to the non-musicians; the mean amplitude of Transient Evoked Otoacoustic Emissions was smaller in the musicians group, but the mean latencies of Auditory Brainstem Response and Cognitive Potential were diminished in the musicians when compared to the non-musicians. Our findings suggest that the population of musicians is at risk for developing music-induced hearing loss. However, the electrophysiological evaluation showed that latency waves of ABR and P300 were diminished in musicians, which may suggest that the auditory training to which these musicians are exposed acts as a facilitator of the acoustic signal transmission to the cortex.