Net increase of lactate and glutamate concentration in activated human visual cortex detected with magnetic resonance spectroscopy at 7 tesla.

After the landmark studies reporting changes in the cerebral metabolic rate of glucose (CMRGlc ) in excess of those in oxygen (CMRO2 ) during physiological stimulation, several studies have examined the fate of the extra carbon taken up by the brain, reporting a wide range of changes in brain lactate from 20% to 250%. The present study reports functional magnetic resonance spectroscopy measurements at 7 Tesla using the enhanced sensitivity to study a small cohort (n = 6). Small increases in lactate (19% ± 4%, P < 0.05) and glutamate (4% ± 1%, P < 0.001) were seen within the first 2 min of activation. With the exception of glucose (12% ± 5%, P < 0.001), no other metabolite concentration changes beyond experimental error were significantly observed. Therefore, the present study confirms that lactate and glutamate changes during physiological stimulation are small (i.e. below 20%) and shows that the increased sensitivity allows reproduction of previous results with fewer subjects. In addition, the initial rate of glutamate and lactate concentration increases implies an increase in CMRO2 that is slightly below that of CMRGlc during the first 1-2 min of activation.

Reconhecimento e construção da competência da pessoa com deficiência na organização em debate

Neste artigo, pretende-se analisar experiências de desenvolvimento de competências e reconhecimento profissional da pessoa com deficiência já inserida no contexto organizacional, considerando os principais atores envolvidos nesse processo. Trata-se de um estudo de caso qualitativo, realizado em uma multinacional farmacêutica, sediada no estado de São Paulo, em que se teve por objetivo descrever e discutir as práticas formais de desenvolvimento profissional da pessoa com deficiência (PcD) adotadas por essa organização, bem como as experiências informais pelas quais passaram esses indivíduos na empresa em questão. Além disso, buscou-se analisar a articulação entre atores externos que estavam imbricados no processo de inclusão, a saber: o sindicato das indústrias farmacêuticas e uma organização não governamental (ONG) especializada em PcDs. Os resultados problematizam a iniciativa de promover um processo de construção e desenvolvimento de competências por meio de experiências formais e informais, e mesmo de autodesenvolvimento, específicas para a PcD. Nesse sentido, a experiência em estudo revelou que nessa iniciativa prevaleceram as premissas acerca das limitações decorrentes das características biológicas dos indivíduos, já que as práticas de desenvolvimento nem sempre trabalharam sobre o potencial desses profissionais, que pouco avançaram, considerando-se as possibilidades que a organização oferece. Outro resultado relevante é que, embora a articulação entre empresa e agentes externos ocorra, não há um diálogo nem uma parceria efetiva que permita fazer avançar o processo de inclusão e de desenvolvimento desse grupo de profissionais. Ao final, procurou-se apresentar ainda elementos que permitam a reflexão sobre a condução de programas organizacionais voltados à PcD e suas implicações, que podem estar a serviço tanto da promoção como da manutenção do status quo da PcD na corporação.

Visual management of sags and incidents gathered in distribution substations for power quality management

Monitor a distribution network implies working with a huge amount of data coining from the different elements that interact in the network. This paper presents a visualization tool that simplifies the task of searching the database for useful information applicable to fault management or preventive maintenance of the network

Visual loss after orthopedic procedures.

Perioperative visual loss (PVL) is a very rare and unpredictable complication of surgery performed at distance from the visual pathways, mostly after spine or cardiac procedures. We report 6 consecutive patients with PVL after routine orthopedic procedures (osteosynthesis for complex fracture of the femur [2], total hip arthroplasty [2], hip prosthesis arthroplasty [1], bilateral simultaneous total knee arthroplasty [1]) and reviewed the literature on the subject. An ischemic optic neuropathy was diagnosed in all cases, and visual loss was bilateral in 5 of 6 patients. Partial visual improvement occurred in only 3 of 11 eyes. No specific therapy is available for PVL. Postoperative visual disturbances should prompt without delay an ophthalmic evaluation because emergent correction of anemia, systemic hypotension, or hypovolemia might improve visual prognosis of PVL.

Analysis of significant factors influencing visual acuity in ocular syphilis.

BACKGROUND: The aim of this study is to determine whether statistical associations can be demonstrated in ocular syphilis between baseline clinical and laboratory parameters with visual acuity at presentation and with any change in visual acuity after treatment. METHODS: Charts of 26 patients (42 eyes) with ocular syphilis presenting to the Uveitis clinic of the Jules-Gonin Eye Hospital were reviewed. A baseline cross-sectional analysis was performed in order to identify any association between visual acuity at presentation and demographic, clinical or laboratory parameters. After treatment, any analogy between these parameters and a change in visual acuity was subsequently assessed in a series of univariate comparisons. RESULTS: The following factors were associated with worse initial visual acuity: severity of visual field impairment at presentation (p=0.012), macular oedema (p=0.004) and optic neuropathy (p=0.031). There was a borderline association with the presence of vasculitis on fluroangiography (p=0.072). Improvement in best corrected visual acuity after treatment was significantly associated with the presence of vasculitis on fluroangiography (p=0.005), neurosyphilis, according to lumbar puncture findings (p=0.037) and marginally with anterior uveitis (p=0.070). Inflammation relapse was associated with the coexistence of pain as presenting sign (p<0.001) and with a longer duration of symptoms prior to the initial visit (p=0.023). CONCLUSIONS: Severe ocular inflammation associated with vasculitis, vitritis or anterior uveitis in ocular syphilis would appear to be a reversible phenomenon that responds well to appropriate antibiotic treatment, resulting in improvement in visual acuity. Prompt treatment enables a good visual prognosis, while any delay in therapy increases the risk of subsequent relapse.

Time processing in visual cortices: How the visual brain encodes and keeps track of time

Time is embedded in any sensory experience: the movements of a dance, the rhythm of a piece of music, the words of a speaker are all examples of temporally structured sensory events. In humans, if and how visual cortices perform temporal processing remains unclear. Here we show that both primary visual cortex (V1) and extrastriate area V5/MT are causally involved in encoding and keeping time in memory and that this involvement is independent from low-level visual processing. Most importantly we demonstrate that V1 and V5/MT are functionally linked and temporally synchronized during time encoding whereas they are functionally independent and operate serially (V1 followed by V5/MT) while maintaining temporal information in working memory. These data challenge the traditional view of V1 and V5/MT as visuo-spatial features detectors and highlight the functional contribution and the temporal dynamics of these brain regions in the processing of time in millisecond range. The present project resulted in the paper entitled: 'How the visual brain encodes and keeps track of time' by Paolo Salvioni, Lysiann Kalmbach, Micah Murray and Domenica Bueti that is now submitted for publication to the Journal of Neuroscience.

Interchange of callosal and association projections in the developing visual cortex.

Neurons projecting transitorily into the corpus callosum from area 17 of the cat were retrogradely labeled by the fluorescent tracer Fast Blue (FB) injected into contralateral areas 17 and 18 on postnatal days 1-5. During the second postnatal month these neurons were still labeled by the early injection, although they had eliminated their callosal axon. At this time, 15-20% of these neurons could be retrogradely relabeled by injections of Diamidino Yellow (DY) into ipsilateral areas 17 and 18, but few or none by similar injections in the other areas that receive from area 17 (19, 21a, PMLS, 20a, 20b, DLS). Similarly, area 17 neurons projecting transitorily to contralateral area PMLS during the first postnatal week could be relabeled by DY injections in ipsilateral areas 17 and 18 but not in PMLS. Already around birth, many transitorily callosal neurons in area 17 send bifurcating axons both to contralateral areas 17 and 18 and ipsilateral area 18. It is probable that during postnatal development some of these neurons selectively eliminate their callosal axon collaterals and maintain the projection to ipsilateral area 18. In fact, some transitorily callosal neurons in area 17 can be double-labeled by simultaneous perinatal injections of FB in contralateral areas 17 and 18 and of a new long-lasting retrograde tracer, rhodamine-conjugated latex microspheres, in ipsilateral area 18. The same neurons can then be relabeled by reinjecting ipsilateral area 18 with DY during the second postnatal month. This finding, however, does not exclude the possibility that some transitorily callosal neurons send an axon to ipsilateral area 18 after eliminating their callosal axon. In conclusion, area 17 neurons that project transitorily through the corpus callosum later participate, probably permanently, in ipsilateral corticocortical projections but selectively to areas 17-18. The mechanism responsible for this selectivity is unknown, but it may be related to the differential radial distribution (i.e., to birth date) of area 17 neurons engaged in the various corticocortical projections. The problems raised by the use of long-lasting retrograde fluorescent tracers in neurodevelopmental studies and by the quantification of results of double- and triple-labeling paradigms are also discussed.

Incluindo pessoas com deficiência na empresa: estudo de caso de uma multinacional brasileira

Os estudos acerca do trabalho da pessoa com deficiência são ainda escassos (TEODÓSIO et al., 2004; TANAKA e MANZINI, 2005) e recentes (CARVALHO-FREITAS e MARQUES, 2010a), restringindo-se, em geral, a práticas de recrutamento e seleção (SCHWARZ e HABER, 2009). Por outro lado, a relevância de promover uma efetiva gestão da inclusão tem respaldo legal na Lei de Cotas, além de um componente estratégico, diante do contexto da gestão da diversidade. Neste artigo, tem-se como objetivo analisar o programa de inclusão de pessoas com deficiência de uma empresa multinacional brasileira da indústria automobilística, contribuindo para a ampliação do conhecimento em relação ao tema. Para tanto, construiu-se, como referencial de análise, um modelo que consiste em oito práticas apontadas como relevantes pela literatura. A partir de entrevistas com os gestores de Recursos Humanos da empresa e de chefes imediatos dos profissionais com deficiência, verificou-se que a empresa realiza parcialmente as práticas descritas no modelo, tendo como restrição à ampliação dele, sobretudo, a forte pressão por redução de custos da indústria.

Assistência institucionalizada a indivíduos portadores de deficiência mental: dimensões esquecidas

O estudo foi realizado em uma instituição que existe indivíduos portadores de deficiência mental. Aqui denominada CASA GRANDE, a instituição abriga cerca de 900 internos. O cuidado direto aos internos é prestado por aproximadamente 400 pajens, formalmente subordinadas ao Serviço de Enfermagem. O propósito desse estudo foi conhecer e compreender como se dá o trabalho das pajens nesse contexto. Para tanto, partiu-se das representações que estas tem à respeito desse cuidar. A análise dessas representações propiciou a compreensão da dimensão simbólica desse trabalho, bem como da psicodinâmica aí compreendida, tanto ao nível da mulher trabalhadora, grupo e instituição.

Comparison of early cortical networks in efficient and inefficient visual search: an event-related potential study.

Functional magnetic resonance imaging studies have indicated that efficient feature search (FS) and inefficient conjunction search (CS) activate partially distinct frontoparietal cortical networks. However, it remains a matter of debate whether the differences in these networks reflect differences in the early processing during FS and CS. In addition, the relationship between the differences in the networks and spatial shifts of attention also remains unknown. We examined these issues by applying a spatio-temporal analysis method to high-resolution visual event-related potentials (ERPs) and investigated how spatio-temporal activation patterns differ for FS and CS tasks. Within the first 450 msec after stimulus onset, scalp potential distributions (ERP maps) revealed 7 different electric field configurations for each search task. Configuration changes occurred simultaneously in the two tasks, suggesting that contributing processes were not significantly delayed in one task compared to the other. Despite this high spatial and temporal correlation, two ERP maps (120-190 and 250-300 msec) differed between the FS and CS. Lateralized distributions were observed only in the ERP map at 250-300 msec for the FS. This distribution corresponds to that previously described as the N2pc component (a negativity in the time range of the N2 complex over posterior electrodes of the hemisphere contralateral to the target hemifield), which has been associated with the focusing of attention onto potential target items in the search display. Thus, our results indicate that the cortical networks involved in feature and conjunction searching partially differ as early as 120 msec after stimulus onset and that the differences between the networks employed during the early stages of FS and CS are not necessarily caused by spatial attention shifts.

Evaluation of free libraries for visual recognition of art imagery on mobile devices

This paper describes a systematic research about free software solutions and techniques for art imagery computer recognition problem.

Discurso político-acadêmico e integração das pessoas com deficiência: das aparências aos sentidos

Objetivamos analisar o Decreto 3.298/99 e os planos das disciplinas dos Cursos de Graduação em enfermagem para verificar inclusão do item participação do enfermeiro no processo de integração das Pessoas Portadoras de Deficiência-PPD. Lemos os planos das disciplinas de quatro universidades; recortamos as disciplinas em comum e as distribuímos conforme o nível de atenção em saúde. As proposições do Decreto são universais, igualitárias e democráticas, os planos encampam a maioria das ações recomendadas pelo Ministério da Saúde para prevenir as deficiências, contudo a prática acadêmica exercita a prevenção-tratamento, silenciando a respeito da inserção do Enfermeiro no processo de integração da PPD.

Modified Corneal Collagen Crosslinking (CXL) Reduces Corneal Edema and Diurnal Visual Fluctuations in Fuchs' Dystrophy

Purpose: Crosslinking of corneal collagen with riboflavin and ultraviolet-A irradiation (CXL) induces crosslinks within and between collagen fibers. CXL increases corneal biomechanical and biochemical stability and is currently used clinically to treat keratectasia. CXL also significantly reduces the stromal swelling capacity. We investigated whether a modified CXL treatment protocol would be beneficial in early Fuchs' dystrophy with various degrees of corneal edema and diurnal variations in visual acuity. Methods: CXL was performed as published previously with the following modification: in cases where the stroma was thicker than 450 µm after abrasion and 30 minutes of instillation of isoosmolar riboflavin solution, glycerol 70% solution was applied every 5 seconds for two minutes, and central corneal thickness (CCT) was measured using ultrasound pachymetry. Glycerol 70% solution was administered repeatedly until the target corneal thickness of 370-430 µm was reached. During irradiation, CCT was monitored by ultrasound pachymetry every five minutes and glycerol 70% solution was applied, if necessary. Results: Three eyes in two patients were treated using the modified CXL protocol. Representative case: a 50-year-old woman with Fuchs' dystrophy and a history of 3 years of diurnal visual fluctuations was referred to us in March 2008. Preoperative best spectacle-corrected visual acuity (BSCVA) was 20/50. We performed modified CXL in the left eye. At one month after CXL, Scheimpflug analysis of CCT showed a reduction of more than 100 µm, and the Corneal Thickness Spatial Profile (CTSP) and Percentage of Increase in Thickness (PIT) showed a regularization of the "flattening" typical for Fuchs' dystrophy. Accordingly, diurnal analysis of corneal thickness showed a distinct postoperative reduction in CCT at all time points measured. At one month after CXL, the patient reported a reduction of diurnal visual fluctuations and we measured an increase in BSCVA to 20/32. The patient showed stable topographical and visual acuity at the three months follow-up. Conclusions: We saw a distinct reduction in CCT, an improvement of the corneal thickness spatial profile (CTSP) and an increase in BSCVA at one month after treatment, which remained stable at the three months follow-up. Patients with early Fuchs' dystrophy and disturbing diurnal visual fluctuations represent a novel application for CXL. Although CXL may not prevent the outcome of the dystrophy, it may increase the patients' visual comfort until keratoplasty becomes necessary.

Acessibilidade e deficiência física: identificação de barreiras arquitetônicas em áreas internas de hospitais de Sobral, Ceará

Pesquisa sobre as barreiras físicas encontradas pelos portadores de deficiência em áreas internas de quatro hospitais de Sobral-Ceará. Estudo quantitativo no qual a coleta de dados foi realizada por cheque-lista baseada na NBR 9050 da Associação Brasileira de Normas Técnicas (ABNT), em maio de 2004. A análise constatou o seguinte: presença de rampas de acesso (100%); escadaria sem corrimão (50%); portas possuem largura ideal (100%); as de vai-e-vem não têm visor (100%); áreas internas de circulação possuem obstáculos (100%); piso das rampas não antiderrapantes (100%); rampas e escadas com corrimão (50%), mas fora do padrão legal. Um hospital é térreo, os outros possuem treze escadas internas; balcões (80%) e assentos públicos (33%) atendem à legislação; bebedouros e telefones não são acessíveis (97%). Concluiu-se que há barreiras físicas e que a legislação está sendo desrespeitada.

Inclusão social da pessoa com deficiência: conquistas, desafios e implicações para a enfermagem

Objetivou-se compreender o discurso das pessoas com deficiência acerca da concretude do processo de inclusão social e articular o discurso desses sujeitos com as diretrizes do Decreto nº 3.298/99. Foram entrevistadas seis pessoas com deficiência física, seis auditivos e seis visuais Os dados foram padronizados e categorizados em dois núcleos de sentidos: diretrizes pré-inclusivistas da pessoa com deficiência, e diretrizes inclusivistas da pessoa com deficiência. A perspectiva metodológica foi a análise de discurso. Conclui-se que esses sujeitos conquistaram legislação que assegura direitos de cidadania, mas existem desafios no campo da saúde, educação, profissionalização e da inserção no mercado de trabalho. Os enfermeiros reabilitadores precisam conhecer a vivência desses sujeitos e dos seus familiares para ajudá-los a buscar estratégias de enfrentamento dos problemas que afetam a sua inclusão e, conseqüentemente, a sua saúde.