João Xavier

ORCID: 0000-0003-2483-2146
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About
Contact & Profiles
Research Areas
  • Vascular Malformations Diagnosis and Treatment
  • Intracranial Aneurysms: Treatment and Complications
  • Acute Ischemic Stroke Management
  • Anesthesia and Pain Management
  • Cerebral Venous Sinus Thrombosis
  • Neurosurgical Procedures and Complications
  • Cerebrovascular and Carotid Artery Diseases
  • Visual perception and processing mechanisms
  • Fetal and Pediatric Neurological Disorders
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Trigeminal Neuralgia and Treatments
  • Cerebrospinal fluid and hydrocephalus
  • Coronary Artery Anomalies
  • Head and Neck Surgical Oncology
  • Action Observation and Synchronization
  • Ocular Diseases and Behçet’s Syndrome
  • Corneal Surgery and Treatments
  • Urological Disorders and Treatments
  • Nausea and vomiting management
  • Periodontal Regeneration and Treatments
  • Linguistics and Language Studies
  • Nasal Surgery and Airway Studies
  • Food Safety and Hygiene
  • Peripheral Artery Disease Management
  • Ophthalmology and Eye Disorders

Hospital de Santo António
1994-2023

Hospital de São João
2017-2023

Universidade do Porto
2023

Centro Hospitalar do Porto
2013-2022

Sociedade Brasileira de Anestesiologia
2019-2020

Universidade Federal de Pernambuco
2014

Chelsea and Westminster Hospital
2006

Cukurova University
2006

Ege University
2006

Bicêtre Hospital
1994

The importance of music in our daily life has given rise to an increased number studies addressing the brain regions involved its appreciation. Some these controlled only for familiarity stimuli, while others relied on pleasantness ratings, and still musical preferences. With a listening test functional magnetic resonance imaging (fMRI) experiment, we wished clarify role correlates appreciation by controlling, same study, both First, conducted test, which participants rated liking song...

10.1371/journal.pone.0027241 article EN cc-by PLoS ONE 2011-11-16

CT perfusion (CTP) is part of the initial evaluation stroke patients, allowing differentiation between infarcted tissue and ischaemic penumbra helping in selection patients for endovascular treatment. This study assessed reliability qualitative CTP maps defining ischemic identified potential pitfalls associated with this technique. We reviewed scans 45 consecutive admitted to our institution anterior circulation acute stroke. Two neuroradiologists performed evaluations cerebral blood volume...

10.15274/nrj-2014-10010 article EN The Neuroradiology Journal 2014-02-01

Background and objectives The gold standard for the treatment of postdural puncture headache (PDPH) is epidural blood patch (EBP). Regional techniques—sphenopalatine ganglion block (SPGB), greater occipital nerve (GONB) trigger point infiltration (TPI)—can also be used PDPH. Our objective was to evaluate efficacy these peripheral blocks (PNBs) in Methods A retrospective study conducted including all patients with PDPH obstetrics department our institution between April 2016 December 2017....

10.1136/rapm-2019-101053 article EN Regional Anesthesia & Pain Medicine 2020-02-23

To assess the accuracy of bilateral inferior petrosal sinus sampling both in differential diagnosis adrenocorticotrophic hormone dependent Cushing's syndrome and predicting localization on pituitary.The authors evaluated all patients that undergone a tertiary centre, between January 1995 March 2018. The probable disease was made when basal central/peripheral gradient was>2 and/or>3 after stimulation with corticotrophin releasing hormone. suggested inter-sinus was>1.4. results obtained were...

10.1055/a-0981-5973 article EN Experimental and Clinical Endocrinology & Diabetes 2019-08-19

Activity in the human motion complex (hMT(+)/V5) is related to perception of motion, be it either real surface or an illusion such as apparent (AM) aftereffect (MAE). It a long-lasting debate whether illusory motion-related activations hMT(+) represent itself attention it. We have asked responses MAEs are present when shifts arousal suppressed and focused on concurrent versus nonmotion features. Significant enhancement activity was observed during spatial angle color This observation...

10.1152/jn.90812.2008 article EN Journal of Neurophysiology 2009-08-26

Five patients, 3 men and 2 women (mean age 43 years), with active neurocysticercosis (NCC) complicated by major cerebral vessel arteritis are described. Three patients presented stroke subacute dementia. The diagnosis of was based on the presence all three following positive tests: (1) computed tomography and/or magnetic resonance images suggestive NCC cysticercus lesions neighbouring involved arteries, (2) cerebrospinal fluid inflammatory cells enzyme-linked immunosorbent assay for...

10.1159/000108468 article EN Cerebrovascular Diseases 1994-01-01

Early arterial recanalisation with stent retrievers (SR) has been recently demonstrated to improve clinical outcome of patients large-vessel occlusion the anterior circulation. However, benefit SR thrombectomy in setting acute basilar artery (BAO) not proven yet. This study evaluated a series consecutive BAO treated SR, focusing on efficacy, safety and results.We analysed 24 who were mechanical thrombectomy. Good at three months was defined as mRS ≤ 2. Data from good compared that poor...

10.1177/1591019915609781 article EN Interventional Neuroradiology 2015-10-21

Acute ischemic stroke in the pediatric population is rare but carries lasting and often lifelong morbidity. Thrombolysis mechanical thrombectomy are mainstays of care adults, yet there very little evidence for these treatments children. We present case a 4-year-old boy with complex congenital heart disease, admitted 30 min after sudden onset an aphasia right hemiplegia, scoring 14 on Pediatric National Institutes Health Stroke Scale (PedNIHSS). Non-contrast brain computed tomography (CT)...

10.1159/000496535 article EN cc-by-nc Case Reports in Neurology 2019-02-08

O mercado consumidor atual tem se tornado cada vez mais exigente, sendo a qualidade não vinculada apenas ao produto, mas sim toda experiência ofertada até o final. Tendo em vista esse cenário e competitividade acirrada entre os concorrentes, adoção de boas práticas na gestão estoque compras é imprescindível nas organizações. Neste sentido, artigo questão como objetivo oferecer métodos previsão demanda conhecidos para contribuir com redução da perda vendas virtude falta aumento percepção do...

10.29327/1439716.6-1 article PT 2024-01-01

Objective : To evaluate the function of collagen membranes in guided bone regeneration, along with their main benefits and limitations. Method This study is a descriptive integrative review, aimed at analyzing use regeneration. The guiding question was: "How do act regeneration?". research was conducted between September November 2024. Data collection began delimitation topic definition descriptors English, using DeCS platform. PubMed, Scielo, BVS databases were searched. A total 1260...

10.69849/revistaft/fa10202411300803 article EN Revista fisio&terapia. 2024-11-30

O Grupo de Pesquisa Educação Surdos, Libras e Inclusão (ESLIN), sediado na Universidade Federal do Acre (UFAC), foi criado em 2017 com o propósito abrir espaços para discussões torno temas relacionados à educação surdos, numa perspectiva ampla, gerar produções âmbito teórico prático envolvendo professores, discentes graduação pós-graduação, técnicos tradutores-intérpretes Libras. Neste artigo, descrevemos processo formação ESLIN quantificamos as geradas pelo referido grupo a partir duas...

10.28998/2317-9945.202483.94-106 article PT cc-by Revista Leitura 2024-12-14
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