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DIFICULTADES DE APRENDIZAJE DEL CÁLCULO: CONTRIBUCIONES AL DIAGNÓSTICO PSICOPEDAGÓGICO

Alejandra Balbi, Sergio Dansilio
2015 Ciencias Psicológicas  
Existe suficiente evidencia científica sobre la Discalculia del Desarrollo (DD) que describe los procesos cognitivos específicos del cálculo y procesos neuropsicológicos relacionados como la memoria de trabajo y percepción visoespacial. Sin embargo es llamativa su baja identificación diagnóstica en la infancia. Este estudio tiene el objetivo de proporcionar evidencia clínica que contribuya a un diagnóstico riguroso. Se presentarán dos estudios de caso (7 y 8 años) que demuestran a través de
more » ... bas normalizadas y de administración individual, déficits en la comprensión del número y la realización de cálculos elementales, en la percepción visoespacial, atención y memoria de trabajo. Se mostrarán los principales signos que permiten identificar el problema al inicio de la escolarización a efectos de realizar precozmente las orientaciones psicopedagógicas necesarias. La inteligencia es normal de acuerdo a pruebas estándar, la instrucción educativa es adecuada, y se descartan alteraciones sensoriales y emocionales. Estos hallazgos contribuyen en la descripción adecuada de la semiología esperada ante una DD para un adecuado diagnóstico. En los casos descritos, se encuentran perturbaciones visuoespaciales posiblemente relacionadas.
doi:10.22235/cp.v4i1.107 doaj:ddf6a5db165c46c483e2303a3493ece9 fatcat:7ct7y5d2qbb33ens5xlrurym7e

Axon-somatic back-propagation in detailed models of spinal alpha motoneurons

Pietro Balbi, Sergio Martinoia, Paolo Massobrio
2015 Frontiers in Computational Neuroscience  
In a previous study (Balbi et al., 2014) , we developed a reduced model of spinal alpha-motoneuron to investigate the reciprocal interplay between AIS and soma during the antidromic conduction of a spike  ... 
doi:10.3389/fncom.2015.00015 pmid:25729362 pmcid:PMC4325909 fatcat:3qun2czgk5bbtpz3atdch7jllu

Enhanced Acoustic Sensitivity in Polymeric Coated Fiber Bragg Grating

Andrea CUSANO, Salvatore D'ADDIO, Antonello CUTOLO, Stefania CAMPOPIANO, Mario BALBI, Sergio BALZARINI, Michele GIORDANO
2007 Sensors & Transducers  
In this work, a new fiber optic hydrophone based on the intensity modulation of the laser light in FBG (Fiber Bragg Grating) under the influence of the sound pressure is experimental proved. In order to increase the sensitivity, FBGs have been coated with proper materials characterized by elastic modulus much lower than the fiber one. The minimum detectable acoustic pressure has been found to be of the order of ~10Pa in the investigated frequency range, with excellent performances in terms of
more » ... near response and wide dynamic range. The experimental analysis also reveals that, by a proper design of the coating features, sensor bandwidth and sensitivity can be tailored for specific applications.
doaj:435abd0165c84a06ac86dfba1e1d181c fatcat:hh3gixgrpbappessl5tcvyzjla

Infrequent Hemorrhagic Complications Following Surgical Drainage of Chronic Subdural Hematomas

Angelo Rusconi, Simone Sangiorgi, Lidia Bifone, Sergio Balbi
2015 Journal of Korean Neurosurgical Society  
or septated haematomas 14) , but are rarely recommended. Although craniotomy has been widely used in combination with inner membranectomy 27) , a higher mortality rate was demonstrated. For this reason, less invasive procedures such as subdural evacuating port systems, are currently spreading over 28) . Mori and Maeda 24) reported in 2001 that post-operative acute subdural hematoma (2.6%) and tension pneumocephalus (0.8%) were the most common complications in CSH surgery. In this series, acute
more » ... ubdural hematoma is attributed to fresh bleeding from the scalp wound. Residual subdural fluid collections and failure of the brain to re-expand may also occur after these surgical procedures. Other post-operative complications include CSH recurrence, seizures and subdural empyema 27, 30) . Cortical hyperemia beneath the hematoma, subarachnoid hemorrhage (SAH), supratentorial intracerebral, intraventricular, and remote cerebellar hemorrhages (RCHs) are rarely observed. In a large series of 1000 CSH 12) , 4 cases of post-operative intracranial bleeding were described (0.4%). Other authors report an incidence range between 0.2 and 4% 8,24) . In our case series, 385 CSH were operated in the Neurosurgery Chronic subdural hematomas mainly occur amongst elderly people and usually develop after minor head injuries. In younger patients, subdural collections may be related to hypertension, coagulopathies, vascular abnormalities, and substance abuse. Different techniques can be used for the surgical treatment of symptomatic chronic subdural hematomas : single or double burr-hole evacuation, with or without subdural drainage, twist-drill craniostomies and classical craniotomies. Failure of the brain to re-expand, pneumocephalus, incomplete evacuation, and recurrence of the fluid collection are common complications following these procedures. Acute subdural hematomas may also occur. Rarely reported hemorrhagic complications include subarachnoid, intracerebral, intraventricular, and remote cerebellar hemorrhages. The causes of such uncommon complications are difficult to explain and remain poorly understood. Overdrainage and intracranial hypotension, rapid brain decompression and shift of the intracranial contents, cerebrospinal fluid loss, vascular dysregulation and impairment of venous outflow are the main mechanisms discussed in the literature. In this article we report three cases of different post-operative intracranial bleeding and review the related literature.
doi:10.3340/jkns.2015.57.5.379 pmid:26113968 pmcid:PMC4479722 fatcat:ukqdkuqxvvajrpu4gnugzgq7rq

Is Guillain-Barrè syndrome triggered by SARS-CoV-2? Case report and literature review

Edoardo Agosti, Andrea Giorgianni, Francesco D'Amore, Gabriele Vinacci, Sergio Balbi, Davide Locatelli
2020 Neurological Sciences  
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the infectious agent responsible for coronavirus disease 2019 (COVID-19). Respiratory and gastrointestinal manifestations of SARS-CoV-2 are well described, less defined is the clinical neurological spectrum of COVID-19. We reported a case of COVID-19 patient with acute monophasic Guillain-Barré syndrome (GBS), and a literature review on the SARS-CoV-2 and GBS etiological correlation. A 68 years-old man presented to the emergency
more » ... artment with symptoms of acute progressive symmetric ascending flaccid tetraparesis. Oropharyngeal swab for SARS-CoV-2 tested positive. Neurological examination showed bifacial nerve palsy and distal muscular weakness of lower limbs. The cerebrospinal fluid assessment showed an albuminocytologic dissociation. Electrophysiological studies showed delayed distal latencies and absent F waves in early course. A diagnosis of Acute Inflammatory Demyelinating Polyradiculoneuropathy (AIDP) subtype of GBS was then made. Neurological manifestations of COVID-19 are still under study. The case we described of GBS in COVID-19 patient adds to those already reported in the literature, in support of SARS-CoV-2 triggers GBS. COVID-19 associated neurological clinic should probably be seen not as a corollary of classic respiratory and gastrointestinal symptoms, but as SARS-CoV-2-related standalone clinical entities. To date, it is essential for all Specialists, clinicians and surgeons, to direct attention towards the study of this virus, to better clarify the spectrum of its neurological manifestations.
doi:10.1007/s10072-020-04553-9 pmid:32643136 fatcat:4dmcy4527rgafece3a4ea3hjom

Collection and fuzzy estimation of truth labels in glial tumour segmentation studies

Elisabetta Binaghi, Valentina Pedoia, Sergio Balbi
2014 Computer Methods in Biomechanics and Biomedical Engineering Imaging & Visualization  
In this work we propose a novel behavioral comparison strategy specifically oriented to accuracy assessment in MRI glial tumor segmentation studies. Solutions are driven from the analysis of different sources of uncertainty involved in the process of manual segmentation and responsible for the high intra-operator and inter-operator variability. A salient aspect of the proposed strategy is the use of the fuzzy set framework in visual inspection and interpretation processes. In particular, a
more » ... ence estimation strategy based on fuzzy connectedness principles is designed to merge individual labels and in a common/mutual segmentation. The estimation is based exclusively on highly reliable information provided by experts. Interaction is then drastically limited comparing to a complete manual tracing, leaving the estimation of the complete segmentation to the fuzzy connectedness method. A set of experiments was conceived and conducted to evaluate the contribution of the solutions proposed in the process of truth label collection and reference data estimation. A comparison analysis was also developed to see whether our method could constitute a worthy alternative to well-known and state-of-the-art solutions.
doi:10.1080/21681163.2014.947006 fatcat:566euy22m5b33ogdw2xyjris7m

Authors' reply to: Letter to editor regarding "The endoscopic diving technique in endonasal transsphenoidal surgery: how I do it"

Davide Locatelli, Sergio Balbi, Pierlorenzo Veiceschi
2020 Acta Neurochirurgica  
doi:10.1007/s00701-020-04438-y pmid:32504116 fatcat:42vuviotvvgbhpv7oex5uxfp7m

Fatores pré-operatórios associados à injúria renal aguda após cirurgia cardíaca: estudo prospectivo

Ana Cláudia Kochi, Antonio Sergio Martins, Maria Cristina Pereira Lima, Luis Cuadrado Martin, André Luis Balbi
2008 Revista da Associação Médica Brasileira  
RESUMO OBJETIVO. Avaliar as características clínicas e as comorbidades pré-operatórias associadas ao desenvolvimento de injúria renal aguda (IRA) em pacientes submetidos a cirurgia cardíaca em hospital universitário de atendimento predominantemente terciário. MÉTODOS. Foram estudados, prospectivamente, 150 pacientes submetidos a cirurgia cardíaca no Hospital das Clínicas da Faculdade de Medicina de Botucatu -UNESP, através de protocolo de estudo iniciado 48 horas antes da cirurgia e encerrado
more » ... horas após. IRA foi definida como aumento da creatinina sérica basal em 30%. Os resultados foram apresentados como média ± desvio padrão ou mediana, com nível de significância de 5%. RESULTADOS. Houve leve predomínio de homens (57%), sendo a idade média da população estudada de 56 ± 14 anos. Sessenta e cinco por cento dos pacientes foram submetidos à revascularização miocárdica. IRA foi diagnosticada em 34% dos casos. Após análise multivariada, idade maior que 60 anos e doença vascular periférica associaram-se de modo significativo ao desenvolvimento de IRA. CONCLUSÃO. IRA foi uma complicação freqüente em pacientes submetidos a cirurgia cardíaca no Hospital das Clínicas da Faculdade de Medicina de Botucatu -UNESP. Idade maior que 60 anos e presença de doença vascular periférica estiveram significativamente associados com o desenvolvimento desta complicação. UNITERMOS: Insuficiência renal aguda. Injúria renal aguda. Cirurgia cardíaca. Complicações.
doi:10.1590/s0104-42302008000300012 pmid:18604397 fatcat:3f3qu2o335ahhmhd4jkl24xgra

Cost-Effectiveness Analysis for a Heavily Modified Water Body (HMWB): The Lambro-Seveso-Olona System Case Study

Arianna Azzellino, Stefano Balbi, Dario Bellingeri, Sergio Cannobbio, Serap Cervigen, Carlo Giupponi, Valeria Mezzanotte, Alessandra Piana
2013 Social Science Research Network  
doi:10.2139/ssrn.2308816 fatcat:5ponfwo7fbb2xiqa5zv5ic56vm

Initial Surgical Experience with Aortic Valve Repair - Clinical and Echocardiographic Results

Francisco Costa, Daniele Collatusso, Ana Claudia Brenner Affonso da Costa, Eduardo Mendel Balbi Filho, Vinicius Nesi Cavicchioli, Sérgio Augusto Veiga Lopes, Andrea Dumsch de Aragon Ferreira, Claudinei Colatusso
2016 Brazilian Journal of Cardiovascular Surgery  
Due to late complications associated with the use of conventional prosthetic heart valves, several centers have advocated aortic valve repair and/or valve sparing aortic root replacement for patients with aortic valve insufficiency, in order to enhance late survival and minimize adverse postoperative events. Methods: From March/2012 thru March 2015, 37 patients consecutively underwent conservative operations of the aortic valve and/or aortic root. Mean age was 48±16 years and 81% were males.
more » ... aortic valve was bicuspid in 54% and tricuspid in the remaining. All were operated with the aid of intraoperative transesophageal echocardiography. Surgical techniques consisted of replacing the aortic root with a Dacron graft whenever it was dilated or aneurysmatic, using either the remodeling or the reimplantation technique, besides correcting leaflet prolapse when present. Patients were sequentially evaluated with clinical and echocardiographic studies and mean follow-up time was 16±5 months. Results: Thirty-day mortality was 2.7%. In addition there were two late deaths, with late survival being 85% (CI 95% -68%-95%) at two years. Two patients were reoperated due to primary structural valve failure. Freedom from reoperation or from primary structural valve failure was 90% (CI 95% -66%-97%) and 91% (CI 95% -69%-97%) at 2 years, respectively. During clinical follow-up up to 3 years, there were no cases of thromboembolism, hemorrhage or endocarditis. Conclusions: Although this represents an initial series, these data demonstrates that aortic valve repair and/or valve sparing aortic root surgery can be performed with satisfactory immediate and short-term results.
doi:10.5935/1678-9741.20160015 fatcat:hxynlvxtrvgxxhloi6cymgaiq4

General Characteristics and Risk Factors of Cardiovascular Disease among Interstate Bus Drivers

Raquel Pastréllo Hirata, Luciana Maria Malosa Sampaio, Fernando Sergio Studart Leitão Filho, Alberto Braghiroli, Bruno Balbi, Salvatore Romano, Giuseppe Insalaco, Luis Vicente Franco de Oliveira
2012 The Scientific World Journal  
Workers in the transportation industry are at greater risk of an incorrect diet and sedentary behavior. The aim of our study was to characterize a population of professional bus drivers with regard to clinical and demographic variables, lipid profile, and the presence of cardiovascular risk factors. Data from 659 interstate bus drivers collected retrospectively, including anthropometric characteristics, systolic and diastolic blood pressure, lipid profile, fasting blood glucose, meatoscopy, and
more » ... audiometry. All participants were male, with a mean age of41.7±6.9years, weight of81.4±3.3 kg, and BMI27.2±3.3 Kg/m2; the mean abdominal and neck circumferences were94.4±8.6 cm and38.9±2.2 cm; 38.2% of the sample was considered hypertensive; mean HDL cholesterol was47.9±9.5 mg/dL, mean triglyceride level was146.3±87.9 mg/dL, and fasting glucose was above 100 mg/dL in 249 subjects (39.1%). Drivers exhibited reduced audiometric hearing at 4–8 kHz, being all sensorineural hearing loss. The clinical characterization of a young male population of interstate bus drivers revealed a high frequency of cardiovascular risk factors, as obesity, hypertension, hyperlipidemia, and hyperglycemia, as well as contributing functional characteristics, such as a low-intensity activity, sedentary behavior, long duration in a sitting position, and high-calorie diet, which lead to excessive weight gain and associated comorbidities.
doi:10.1100/2012/216702 pmid:22701350 pmcid:PMC3373126 fatcat:hh2bubyjrjgwpjasc7chpsgl6a

Initial Surgical Experience with Aortic Valve Repair - Clinical and Echocardiographic Results

Francisco Costa, Daniele Collatusso, Ana Claudia Brenner A. da Costa, Eduardo Mendel Balbi Filho, Vinicius Nesi Cavicchioli, Sérgio Augusto Veiga Lopes, Andrea Dumsch de Aragon Ferreira, Claudinei Colatusso
2016 Brazilian Journal of Cardiovascular Surgery  
Due to late complications associated with the use of conventional prosthetic heart valves, several centers have advocated aortic valve repair and/or valve sparing aortic root replacement for patients with aortic valve insufficiency, in order to enhance late survival and minimize adverse postoperative events. Methods: From March/2012 thru March 2015, 37 patients consecutively underwent conservative operations of the aortic valve and/or aortic root. Mean age was 48±16 years and 81% were males.
more » ... aortic valve was bicuspid in 54% and tricuspid in the remaining. All were operated with the aid of intraoperative transesophageal echocardiography. Surgical techniques consisted of replacing the aortic root with a Dacron graft whenever it was dilated or aneurysmatic, using either the remodeling or the reimplantation technique, besides correcting leaflet prolapse when present. Patients were sequentially evaluated with clinical and echocardiographic studies and mean follow-up time was 16±5 months. Results: Thirty-day mortality was 2.7%. In addition there were two late deaths, with late survival being 85% (CI 95% -68%-95%) at two years. Two patients were reoperated due to primary structural valve failure. Freedom from reoperation or from primary structural valve failure was 90% (CI 95% -66%-97%) and 91% (CI 95% -69%-97%) at 2 years, respectively. During clinical follow-up up to 3 years, there were no cases of thromboembolism, hemorrhage or endocarditis. Conclusions: Although this represents an initial series, these data demonstrates that aortic valve repair and/or valve sparing aortic root surgery can be performed with satisfactory immediate and short-term results.
doi:10.5935/1678-9741.20160027 pmid:27556321 pmcid:PMC5062723 fatcat:dwke4gx6i5elpaigtmsixwti5m

Biocontrol of Sclerotinia sclerotiorum and white mold of soybean using saprobic fungi from semi-arid areas of Northeastern Brazil

Daiane Cristina Martins Barros, Inês Cristina de Batista Fonseca, Maria Isabel Balbi-Peña, Sérgio Florentino Pascholati, Douglas Casaroto Peitl
2015 Summa Phytopathologica  
Aceito para publicação em: , D.C.M.; Fonseca, I.C.B; Balbi-Peña, M.I.; Pascholati, S.F.; Peitl, D.C.  ...  Balbi-Peña et al. (5) conducted antagonism test between saprobic fungi and S. sclerotiorum on three different culture media (potatodextrose-agar; carrot-agar and Pontecorvo minimal medium) and observed  ... 
doi:10.1590/0100-5405/2086 fatcat:rwzmlwac4rgm3nit2wlp7ktbim

Endoscopic Endonasal Transethmoidal-Transsphenoidal Approach to a Cavernous Sinus Chondrosarcoma

Gianluca Agresta, Alberto Campione, Fabio Pozzi, Pierlorenzo Veiceschi, Martina Venturini, Edoardo Agosti, Sergio Balbi, Paolo Battaglia, Davide Locatelli
2021 Journal of Neurological Surgery. Part B: Skull Base: an interdisciplinary approach  
Objective We illustrate a cavernous sinus chondrosarcoma treated with an endoscopic endonasal transethmoidal-transsphenoidal approach. Design Case report of a 15-year-old girl with diplopia and esotropia due to complete abducens palsy. Preoperative images showed a right cavernous sinus lesion with multiple enhanced septa and intralesional calcified spots (Fig. 1). Considering tumor location and the lateral dislocation of the carotid artery, an endoscopic endonasal approach was performed to
more » ... ve symptoms and to optimize the target geometry for adjuvant conformal radiotherapy. Setting The study was conducted at University of Insubria, Department of Neurosurgery, Varese, Italy. Participants Skull base team was participated in the study. Main Outcome Measures A transethmoidal-transsphenoidal approach was performed by using a four-hand technique. We used a route lateral to medial turbinate to access ethmoid and the sphenoid sinus. During the sphenoid phase, we exposed the medial wall of the cavernous sinus (Fig. 2) and the lesion was then removed using curette. Skull base reconstruction was performed with fibrin glue and nasoseptal flap. Results No complications occurred after surgery, and the patient experienced a complete recovery of symptoms. A postoperative magnetic resonance imaging showed a small residual tumor inside the cavernous sinus (Fig. 1). After percutaneous proton-bean therapy, patient experienced only temporary low-grade toxicity with local control within 2 years after treatment completion. Conclusion Endoscopic endonasal extended approach is a safe and well-tolerated procedure that is indicated in selected cases (intracavernous tumors, soft tumors not infiltrating the vessels and/or the nerves). A tailored approach according to tumor extension is crucial for the best access to the compartments involved.The link to the video can be found at: https://youtu.be/TsqXjqpuOws.
doi:10.1055/s-0041-1726018 pmid:36068905 pmcid:PMC9440873 fatcat:b7ljxxl5wrcjdaacrieulf477a

Influência da escolaridade na hipertrofia miocárdica de pacientes em hemodiálise

Rosana dos Santos e Silva Martin, Roberto Jorge da Silva Franco, Beatriz Bojikian Matsubara, Silméia Garcia Zanati, Pasqual Barretti, Luis Cuadrado Martin, André Luis Balbi, Aline Araújo Antunes, Antônio Sérgio Martins
2010 Brazilian Journal of Nephrology  
Chronic renal disease is associated with a high cardiovascular risk. Data from the general population associate cardiovascular diseases with low educational level, but no study has evaluated this association in patients on hemodialysis. Objective: This study aimed at evaluating the association between educational level, hypertension, and left ventricular hypertrophy in patients on chronic hemodialysis. Methods: A standard socioeconomic questionnaire was applied to 79 hemodialysis patients at
more » ... Hospital das Clínicas of Faculdade de Medicina de Botucatu, state of São Paulo. Clinical, laboratory and echocardiographic data were obtained from medical records. The patients were divided into two groups according to the median educational level, as follows: G1, patients with three or less years of schooling; G2, patients with more than three years of schooling. Results: Blood pressure, interdialytic weight gain, and variables statistically different in the two groups (p < 0.2) underwent multiple analysis. Independent associations were stated with p < 0.05 in multiple analysis. The mean age of patients was 57 ± 12.8 years, 46 were males (57%), and 53 white (67%). The variables selected for multiple analysis were: age (p = 0.004); educational level (p < 0.0001); body mass index (p = 0.124); left ventricular diameter (p = 0.048); and left ventricular mass index (p = 0.006). Antihypertensive drugs were similar in both groups. Systolic blood pressure (p = 0.006) and years of schooling (p = 0.047) had a significant and independent correlation with left ventricular mass index. Conclusion: In hemodialysis patients, left ventricular mass associated not only with blood pressure but also with educational level.
doi:10.1590/s0101-28002010000100012 fatcat:wdyvc2kpp5a53bu47474settnq
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