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Search Results: 1 - 10 of 82693 matches for " Maria Stella Arantes do Amaral "
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The Influence of Sound Deprivation on Audiologic Outcomes after Cochlear Implantation  [PDF]
Maria Stella Arantes do Amaral, Ana Cláudia Mirandola Barbosa Reis, Henrique F. Pauna, Sarah C. Bernal, Eduardo T. Massuda, Miguel Angelo Hyppolito
International Journal of Clinical Medicine (IJCM) , 2018, DOI: 10.4236/ijcm.2018.91004
Abstract: The cochlear implant is a prosthesis that is capable to replace listening capability among patients with sensorineural hearing loss. Many studies suggest a negative relationship among duration of sound deprivation and audiometric gain (by means of speech perception test) after cochlear implantation. We evaluated surgical and audiologic results among post-lingual deafened adults, in different times of sound deprivation, and correlated with social isolation, presence of vertigo or tinnitus, and the speech therapy yield, between pre- and post-operative stages. A retrospective study was conducted on patients with post-lingual hearing loss, aged over 18 years old who underwent cochlear implant surgery in a public hospital from 2004 to 2014. Audiological, socio-demographic questionnaire, and manifestations of vertigo and tinnitus, during pre- and post-operative stages, were compared and correlating to the different periods of sound deprivation. Two groups were studied. The group A was composed of 38 participants (14 male and 24 female) with sound deprivation of less than 10 years; and group B was composed of 17 participants (8 male and 9 female) with sound deprivation longer than 10 years. We found no differences regarding age, sex, duration of sound deprivation, mean pure-tone audiometric results (pre- and post-surgery), and speech perception tests (pre-operatively). After one year of the surgery, we observed a significant difference between both groups, with a better performance to group A. The results of speech perception test, after cochlear implantation in group B, were worse than the results obtained in group A, although these correlations are not determinant whether to perform cochlear implant surgery or not.
Cochlear Implant in a Patient with Arnold-Chiari Syndrome  [PDF]
Maria Stella Arantes do Amaral, Daniela Soares Fonseca, Antonio Carlos dos Santos, Henrique Furlan Pauna, Eduardo T. Massuda, Ana Cláudia Mirandola Barbosa Reis, Miguel Angelo Hyppolito
Case Reports in Clinical Medicine (CRCM) , 2018, DOI: 10.4236/crcm.2018.72014
Abstract: Objective: To verify the efficacy of cochlear implantation in a patient with Arnold-Chiari syndrome. Design: Review of a medical chart from a patient with Arnold-Chiari syndrome that underwent to cochlear implant surgery. Case report: A 6 year-old female, with meningomyelocele and congenital hydrocephalus, deaf in the past 3 years, after meningitis. At that time, she used oral language with adequate speech development. Tone audiometry revealed bilateral profound sensorineural hearing loss. The MRI was compatible with the Arnold-Chiari syndrome. Cochlear implantation was performed on the left ear with MED-EL? Implant (model SONATATi100). Currently, the child is 12 year-old, performs speech therapy three times a week, with good hearing and language development. Conclusion: Despite the presence of Arnold-Chiari syndrome (Chiari type II) with neurological disorders and with ventriculoperitoneal shunt, patient had good hearing results after cochlear implant surgery.
Long Latency Auditory Potential (P300) Outcomes in a Patient with Vestibular Schwannoma after Cochlear Implant Surgery  [PDF]
Maria Stella Arantes do Amaral, Victor Goiris Calderaro, Henrique Furlan Pauna, Eduardo Tanaka Massuda, Ana Cláudia Mirandola Barbosa Reis, MiguelMiguel ?ngelo Hyppolito
Case Reports in Clinical Medicine (CRCM) , 2018, DOI: 10.4236/crcm.2018.75031
Abstract: Background: Neurofibromatosis type 2 (NF2) is a rare syndrome and it is usually presented with bilateral vestibular schwannomas (VS), multiple meningiomas, and other types of tumors associated to peripheral nerves. Hearing loss is one of its leading manifestations, and surgery for removal of the tumor is often required. Cochlear implant (CI) surgery is an option for auditory rehabilitation and long latency auditory potentials (P300) are becoming a very useful tool to assess hearing outcomes. Objective: To verify the presence of P300 waves during auditory and cortical function assessment in a patient submitted to VS removal and CI surgery. Design: Retrospective chart review. Case Report: A 62 years old male patient, presented at the clinic with a bilateral severe to profound hearing loss, worst at the right side. MRI scan revealed bilateral expansive tumor within the internal auditory canal expanding to cerebellopontine angle, suggestive of VS. Tumor was removed at the right side, and CI surgery was indicated for the left ear. P300 tests were performed pre-operatively, at the moment of activation, and 6 months post-operatively. After CI activation, P300 waves appeared, and presented reduced latency and increased amplitude after 6 months of CI use. Conclusion: P300 waves appear to be dependent on the auditory stimulus to be generated, showing that it can be a useful tool to estimate improvement in cortical cognitive function after restoring hearing through CI surgery after VS removal.
Auditory Dysfunction in Aging: Prospects for Stem Cell Therapy  [PDF]
Henrique F. Pauna, Maria Stella A. Amaral, Steven K. Juhn, Walter C. Low, Miguel A. Hyppolito
Advances in Bioscience and Biotechnology (ABB) , 2019, DOI: 10.4236/abb.2019.102002
Abstract: Age-related hearing loss is the most common cause of adult auditory dysfunction. It is characterized by bilateral, progressive auditory deterioration associated with the aging process. There currently are limited options for the treatment as hearing aids or cochlear implants. To establish novel strategies for the treatment of this entity, it is crucial to elucidate the mechanisms of age-related hearing loss. Its etiology is believed to be multifactorial including both intrinsic and extrinsic factors. Oxidative damage, as seen in other aging organs systems, may play an essential role in the pathogenesis of the age-related hearing loss. Studies on animal models and human temporal bones have indicated a close relationship between degeneration of the cochlear lateral wall and hearing loss. Additional therapies that may prove beneficial in the treatment of age-related hearing loss include stem cell therapy, which we intend to review in this manuscript.
A regulamenta??o do acesso aos recursos genéticos e aos conhecimentos tradicionais associados no Brasil
Azevedo, Cristina Maria do Amaral;
Biota Neotropica , 2005, DOI: 10.1590/S1676-06032005000100002
Abstract: the nationwide enforcement of the convention on biological diversity, particularly articles 8j and 15 which address respectively traditional knowledge and access to genetic resources and distribution of the benefits deriving from it's utilization, has generated an intense debate regarding it's impact on research. today, in brazil, provisional measure 2.186-16/01 (mp), which established the rules for the access and sending of genetic patrimony components and the access to associated traditional knowledge, is in effect. this norm foresaw the creation inside the ministry of the environment of a national competent authority the genetic heritage management council (cgen), whose activities began in april 2002. in 2003, with the new government, enforcement of the mp tried to address, as far as possible, the demands of sectors of society, publishing acts that clarify concepts which are fundamental for it's enforcement, reducing bureaucracy in the application of the norm and giving greater transparency to the actions of the cgen. however, as these actions are limited by the legal text in force, a preliminary draft was made for a law to be sent by the federal executive government to the national congress, after being analyzed by the competent government department. taking up again the legislative process, began in 1995 and interrupted in 2000 with the first edition of the above mp mentioned, society will have a new opportunity to participate in the discussion of this matter, with deeper understanding.
Estudo sobre a evolu??o do risco de infec??o tuberculosa em área com elevada cobertura por BCG
Arantes,Gilberto Ribeiro; Nardy,Stella Maria Costa; Nassar,Jannete;
Revista de Saúde Pública , 1985, DOI: 10.1590/S0034-89101985000200001
Abstract: the estimation of the risk of tuberculous infection from prevalence data obtained at school-age, in 1974 and in 1982, permitted the determination of the relevant trend in the city of s. paulo, brazil, between those years. the risk of infection decreased, on average, by 5% annually during the period. there was no evidence of any association between the proportions of vaccinated children and that of infected children among those unvaccinated, in the 59 schools studied. tuberculin sensitivity in 7 years old school-children, vaccinated with bcg at any age between the 1st and the 6th year of life was 2.5 times more intense than that in unvaccinaetd children of the same age. with regard to the calculation of the true value of the risk of tuberculous infection, commentaries about the unrealiability of the available data were made.
Expans?o urbana e turismo no litoral de Santa Catarina: o caso das microrregi?es de Itajaí e Florianópolis
Pereira, Raquel Maria Fontes do Amaral;
Intera??es (Campo Grande) , 2011, DOI: 10.1590/S1518-70122011000100010
Abstract: the unstable social tissues of rural brazilian area shows that ownership of the land itself has failed to develop. of the institutions that came into contact with before and after land ownership, religious organizations are most remembered. the article analyzed the role of religion in the social organization of the settlement by interviews with settlers. the trust has stood as the decisive action of restoring the fragile bonds in the studied community.
Ontogenia inicial do androceu de espécies de Ochnaceae subfam. Sauvagesioideae através da análise em microscopia eletr?nica de varredura
Brazilian Journal of Botany , 1998, DOI: 10.1590/S0100-84041998000300005
Abstract: the family ochnaceae can be divided into two presumably monophyletic subfamilies. traditionally, the ochnaceae are included in the order theales, subclass. dilleniidae, characterized by a centrifugal development of the androecium. some time ago it was demonstrated, however, that the development of the androecium of ochna atropurpurea (subfam. ochnoideae) follows a centripetal pattern. to clarify whether this pattern might be characteristic for the whole family, the early androecial ontogeny of five species from four genera of subfam. sauvagesioideae was investigated with the help of a sem. in all the species studied the development of the androecium follows a centrifugal pattern. data are still insufficient to allow for conclusions about which type of ontogeny is primitive in the family.
Public policies in higher education for the indigenous peoples of the state of Paraná, Brazil: trajectories, challenges and perspectives
Wagner Roberto do Amaral,Tania Maria Baibich
Práxis Educativa , 2012,
Abstract: The experience on the admittance and permanence of indigenous students in public higher education institutions which are the promoters of public policy in higher education in the state of Paraná, Brazil, is provided. Current article is based on the indigenous students’ trajectories at the state universities of Paraná when they were admitted through the Indigenous Entrance Exam. In fact, their permanence in higher education institutions has been possible due to the dual belonging of schooling and ethnicity. It highlights the limits of the State’s role in this policy since their permanence requires higher education policies actually aimed at these subjects and sensitive to the traits built by them. Current analysis is the product of a review of the literature, document analysis and content analysis of interviews with indigenous students and recently graduated indigenous professionals. The uniqueness of the experience in the state of Paraná in the last decade is acknowledged. In fact, its consolidation has been foregrounded on the effective action by the above-mentioned state, by government-run universities and by indigenous leaders and communities.
Ontogenia inicial do androceu de espécies de Ochnaceae subfam. Sauvagesioideae através da análise em microscopia eletr nica de varredura
Brazilian Journal of Botany , 1998,
Abstract: A família Ochnaceae pode ser dividida em duas subfamílias supostamente monofiléticas. Tradicionalmente, as Ochnaceae s o incluídas na Ordem Theales, Subclasse Dilleniidae, que se caracterizam por apresentar um padr o centrífugo de desenvolvimento do androceu. Foi demonstrado, entretanto, que o desenvolvimento do androceu de Ochna atropurpurea (Ochnaceae subfam. Ochnoideae) é centrípeto. Para esclarecer se esse padr o seria característico para a família como um todo, foi investigada a ontogenia do androceu de cinco espécies de quatro gêneros, pertencentes à subfam. Sauvagesioideae, com o auxílio de MEV. Em todas as espécies investigadas, o desenvolvimento do androceu segue o padr o centrífugo. Os dados s o ainda insuficientes para permitir conclus es sobre qual tipo de desenvolvimento deve ser primitivo para a família.
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