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Pardal A, Martinez AS, Ciotti ÁM, Christofoletti RA, Cordeiro CAMM. Macroecology of rocky intertidal benthic communities along the southwestern Atlantic: Patterns of spatial variation and associations with natural and anthropogenic variables. Mar Environ Res 2023; 190:106099. [PMID: 37454508 DOI: 10.1016/j.marenvres.2023.106099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/26/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
Assessing spatial variability in biodiversity and its relationships with potential drivers is necessary for understanding and predicting changes in ecosystems. Here, we evaluated spatial patterns in sessile macrobenthic communities in rocky intertidal habitats along the southwestern Atlantic (SE Brazil), spanning over 500 km of coastline. We applied a rapid-survey approach focusing on the main space occupiers and habitat-forming taxa. We partitioned community variance into spatial scales ranging from metres to hundreds of kilometres and assessed whether community patterns were associated with variation in shore topography, nearshore ocean, and human influence. The communities from the mid-midlittoral level exhibited equivalent variation (31-35%) at the scales of quadrats (metres), sites (kilometres), and sub-regions (tens of kilometres). For the communities from the low-midlittoral and infralittoral fringe levels, most variability occurred at the scales of quadrats and sites (30-42%), followed by sub-regions (22%). Wave fetch, sea surface temperature (SST), and shore inclination were the variables that best explained community structure at the mid-midlittoral. At the low-midlittoral and infralittoral fringe, the most influential variables were related to oceanic forcing (SST, total suspended solids, particulate organic carbon, chlorophyll-a concentration) and human influence. Univariate analyses also revealed strong associations between the abundance of the main components of the communities and the predictor variables evaluated. Our results suggest that urbanised estuarine bays and coastal upwelling regimes have a strong influence on adjacent benthic communities, driving macroecological patterns in the study area. This study advances the knowledge in macroecology and biogeography of rocky shores in an understudied coastline and globally and provides valuable insights for future assessments of ecological changes resulting from unfolding human impacts.
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Affiliation(s)
- André Pardal
- Center of Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP, 09210-170, Brazil; Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil.
| | - Aline S Martinez
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil
| | - Áurea M Ciotti
- Center for Marine Biology, University of São Paulo (CEBIMar/USP), Rod. Manoel Hipólito do Rego, km 131.5, São Sebastião, SP, 1160-000, Brazil
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil
| | - Cesar A M M Cordeiro
- Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ, 28013-602, Brazil
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Saucedo M, León-Cejas L, Marchesoni C, Pardal A, Reisin R. Ultra-high dose of intravenous immunoglobulin restores strength and motor function in a patient with refractory multifocal motor neuropathy. Rev Neurol 2023; 76:209-211. [PMID: 36908034 PMCID: PMC10364064 DOI: 10.33588/rn.7606.2021287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
INTRODUCTION Multifocal motor neuropathy (MMN) is a chronic progressive immune-mediated neuropathy, predominantly involving upper limbs asymmetrically with electrophysiologic evidence of motor conduction block. The treatment of choice is immunoglobulin (Ig). Nevertheless, some patients may become resistant to treatment. We describe a patient with history of MMN who became resistant to gammaglobulin treatment but markedly improved using ultra-high doses of intravenous immunoglobulin. CASE REPORT A 36-year-old woman with diagnosis of MMN. After 5 years of clinical stability under subcutaneous Ig (2g/kg/month) the patient developed bilateral weakness involving both hands. Treatment was switched to intravenous Ig 2g/kg/month, nevertheless, she progressed and became totally dependent for activities of daily living. We started ultra-high dose intravenous immunoglobulin 5 g/kg/month, with good response. She became independent for activities of daily living and returned to work. The only treatment related adverse event was headache during infusion. CONCLUSION Ultra-high dose intravenous Ig seems to be a useful therapy in aggressive MMN with severe disability despite conventional treatment. A low cardiovascular risk score (QRISK2 less than 10%) and a daily intravenous Ig lower than 35 g reduce the risk of severe complications related to intravenous Ig.
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Affiliation(s)
- M Saucedo
- Hospital Británico, Buenos Aires, Argentina
| | | | | | - A Pardal
- Hospital Británico, Buenos Aires, Argentina
| | - R Reisin
- Hospital Británico, Buenos Aires, Argentina
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Martinez AS, Pardal A, Christofoletti RA, Underwood AJ, Marcelo-Silva J, Lana PC. More on the science of marine environmental impact assessments in Brazil: A reply to Krull and Barros (2022). Sci Total Environ 2022; 838:155935. [PMID: 35577094 DOI: 10.1016/j.scitotenv.2022.155935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Affiliation(s)
- Aline S Martinez
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil.
| | - André Pardal
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil; Center for Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP 09210-170, Brazil
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - Antony J Underwood
- Marine Ecology Laboratories A11, School of Life and Environmental Sciences, University of Sydney, NSW 2006, Australia
| | - João Marcelo-Silva
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa
| | - Paulo C Lana
- Laboratório de Ecologia Marinha, Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira-mar, s/n, Pontal do Paraná, PR 83255-976, Brazil
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Martinez AS, Underwood AJ, Christofoletti RA, Pardal A, Fortuna MA, Marcelo-Silva J, Morais GC, Lana PC. On the science of marine environmental impact assessments in Brazil: A reply to Choueri et al. (2022). Sci Total Environ 2022; 826:155229. [PMID: 35421498 DOI: 10.1016/j.scitotenv.2022.155229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Affiliation(s)
- Aline S Martinez
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil.
| | - Antony J Underwood
- Marine Ecology Laboratories A11, School of Life and Environmental Sciences, University of Sydney, NSW 2006, Australia
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - André Pardal
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil; Center for Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP 09210-170, Brazil
| | - Monique A Fortuna
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - João Marcelo-Silva
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - Gisele C Morais
- Laboratório de Bentos, Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira-mar, s/n, Pontal do Paraná, PR 83255-976, Brazil
| | - Paulo C Lana
- Laboratório de Bentos, Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira-mar, s/n, Pontal do Paraná, PR 83255-976, Brazil
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Martinez AS, Underwood T, Christofoletti RA, Pardal A, Fortuna MA, Marcelo-Silva J, Morais GC, Lana PC. Reviewing the effects of contamination on the biota of Brazilian coastal ecosystems: Scientific challenges for a developing country in a changing world. Sci Total Environ 2022; 803:150097. [PMID: 34500263 DOI: 10.1016/j.scitotenv.2021.150097] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
Pollution is a major worldwide problem that is increasing with urban growth, mainly along coastal areas. Pollution is often worse, governance is poorer and managerial strategies to improve environmental quality are less advanced in developing than developed countries. Here, we present an overview of the current scientific knowledge of the impacts of contamination on the biota of coastal ecosystems of Brazil and evaluate the scientific challenges to provide baseline information for local managerial purposes. We compiled data from 323 peer-reviewed published papers from the extensive Brazilian coast. We critically evaluated the produced knowledge (target contaminants, sources, ecosystems, taxa, response variables) and the science behind it (rigour and setting) within its socioenvironmental context (land occupation, use of the coast, sanitation status, contamination history). Research was driven largely by environmental outcomes of industrial development with a focus on the single effects of metals on the biota. The current knowledge derives mainly from laboratory manipulative experiments or from correlative field studies of changes in the biota with varying levels of contamination. Of these, 70% had problems in their experimental design. Environmental impacts have mainly been assessed using standard indicators of populations, mostly in ecotoxicological studies. Benthic assemblages have mostly been studied using structural indicators in field studies. Future assessments of impacts should expand research to more taxonomic groups and ecosystem compartments, adding combined functional and structural responses. Furthermore, further investigations need to consider the interactive effects of contaminants and other environmental stressors. By doing so, researchers would deliver more robust and effective results to solve problems of pollution.
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Affiliation(s)
- Aline S Martinez
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil.
| | - Tony Underwood
- Marine Ecology Laboratories A11, School of Life and Environmental Sciences, University of Sydney, NSW 2006, Australia
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - André Pardal
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil; Center for Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP 09210-170, Brazil
| | - Monique A Fortuna
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - João Marcelo-Silva
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - Gisele C Morais
- Laboratório de Bentos, Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira-mar, s/n, Pontal do Paraná, PR 83255-976, Brazil
| | - Paulo C Lana
- Laboratório de Bentos, Centro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira-mar, s/n, Pontal do Paraná, PR 83255-976, Brazil
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Pardal A, Cordeiro CAMM, Ciotti ÁM, Jenkins SR, Giménez L, Burrows MT, Christofoletti RA. Influence of environmental variables over multiple spatial scales on the population structure of a key marine invertebrate. Mar Environ Res 2021; 170:105410. [PMID: 34271484 DOI: 10.1016/j.marenvres.2021.105410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/02/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Quantifying scale-dependent patterns and linking ecological to environmental variation is required to understand mechanisms regulating biodiversity. We conducted a large-scale survey in rocky shores along the SE Brazilian coast to examine spatial variability in body size and density of an intertidal barnacle (Chthamalus bisinuatus) and its relationships with benthic and oceanographic predictors. Both the size and density of barnacles showed most variation at the smallest spatial scales. On average, barnacle body size was larger on shores located in areas characterised by higher chlorophyll levels, colder waters, low wave action and low influence of freshwater. Barnacles were more abundant at wave-exposed shores. We identified critical scales of spatial variation of an important species and linked population patterns to essential environmental predictors. Our results show that populations of this barnacle are coupled to scale-dependent oceanographic variation. This study offers insights into the mechanisms regulating coastal populations along a little studied coastline.
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Affiliation(s)
- André Pardal
- Center of Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP, 09210-170, Brazil; Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil.
| | - César A M M Cordeiro
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil; Marine Biology Department, Federal Fluminense University (LECAR/UFF), Outeiro de São João Batista, s/n, Niterói, RJ, 24020-141, Brazil
| | - Áurea M Ciotti
- Center for Marine Biology, University of São Paulo (CEBIMar/USP), Rod. Manoel Hipólito do Rego, km 131.5, São Sebastião, SP, 1160-000, Brazil
| | - Stuart R Jenkins
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK
| | - Luis Giménez
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK
| | - Michael T Burrows
- Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, UK
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP, 11070-100, Brazil
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Pardal A, Martinez AS, Christofoletti RA, Karythis S, Jenkins SR. Impacts of copper contamination on a rocky intertidal predator-prey interaction. Mar Pollut Bull 2021; 162:111902. [PMID: 33341076 DOI: 10.1016/j.marpolbul.2020.111902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Metal contamination can change ecological interactions with potential effects on community dynamics. However, understanding real effects of metals on biota relies on studies undertaken in natural conditions. Through a field experiment, we investigated the effects of copper contamination on the responses of a barnacle prey and its predator, the dogwhelk, and explicitly their interaction. Contamination increased barnacle mortality and reduced predation with no effects on interaction strength. This was because the higher mortality of the prey compensated for the lower consumption of the predator. Despite not affecting the interaction strength, these results suggest a decrease in energy flow in the trophic chain that may lead to important changes in community structure and ecosystem functioning. This study shows the importance of manipulative experiments designed to provide mechanistic insights into ecological interactions to better clarify the effect of stressors on the structure and dynamic of communities.
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Affiliation(s)
- André Pardal
- Center for Natural and Human Sciences, Federal University of ABC (CCNH/UFABC), Rua Santa Adélia, 166, Santo André, SP 09210-170, Brazil; Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil; School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, United Kingdom.
| | - Aline S Martinez
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - Ronaldo A Christofoletti
- Institute of Marine Science, Federal University of São Paulo (IMar/UNIFESP), Rua Dr Carvalho de Mendonça 144, Santos, SP 11070-100, Brazil
| | - Simon Karythis
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, United Kingdom
| | - Stuart R Jenkins
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, United Kingdom
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Pardal A, Correia N, Santos C, Matos Pires A. New psychiatric service – fresh nurses experiences. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.1233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The year 2015 started a new assistance in the cycle of mental health care ending the gap that existed in the district of Beja in the last twenty years, in this area. The aim of this presentation is to give the data of nursing activity in the first six months inpatient psychiatric service. The population studded was 98 inpatients, 53%male and 47% females aged between 16 and 87-years-old, diagnosed with depression, schizophrenia, personality disorders, bipolar disorders, dementias and others. Descriptive statistic of collected data. We rated the gender, marital status, aged and main disorders as well as the nursing therapeutic activities preformed with the patients. Six different kinds of activities were done. The total of interventions were 148: relaxation, ludic activities, physical activity, art therapy, health education and music therapy. Nursing intervention in the treatment of people with mental disorders improves the compliance to the treatment (adherence, self-care, useful occupation, stress career and insight of the illness) during the hospitalization time, aiming to avoid the worsening situation and the social isolation of the patient, and promote the recovery and quality of life. These objectives begin on hospital stay during the acute crisis. We are aware of the fact that this is just the beginning of this approach and for more and better results we have to have a bigger sample and a longer time of intervention as well as better methodology, namely the use of scales to measure some parameters that can provide more consistent and objective findings.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Zuberbuhler P, Young P, Bandeo L, León Cejas L, Finn B, Bruetman J, Calandra C, Fulgenzi E, Pérez Akly M, Pardal A, Reisin R. P212: Clinical spectrum of sensory ganglionopathy in eight patients. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50346-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pardal A, Espirito-Santo H, Lemos L, Matreno J, Amaro H, Guadalupe S, Daniel F, Ferreira J, Fernandes M, Carvalho D, Maia S, Gonçalves R. 1556 – Social suport, mental health, and satisfaction with life in institutionalized elderly. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76565-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Fiol M, Cammarota A, Rivero A, Pardal A, Nogués M, Correale J. Focal stiff-person syndrome. Neurologia 2001; 16:89-91. [PMID: 11257937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
Stiff-person syndrome (SPS) is a disorder of motor function characterized by rigidity of axial musculature and fluctuating painful spasms, which are often induced by startle or emotional stimuli. Neurophysiological studies have demonstrated the presence of continuous motor unit activity in muscle at rest, with abnormally enhanced extereoceptive reflexes. Although criteria for the diagnosis of SPS were proposed, several variants of this syndrome have been described before. In this communication, we report the case of a patient with a focal form of SPS. A 39-year-old woman developed progressive instability in her gait, spasms and stiffness restricted to both legs. The electromyographic examination showed continuous motor unit activity of the affected muscles at rest. Moreover, high anti-GAD antibodies titers were found in CSF and serum. Clinical symptoms, electrophysiological and immunological profiles suggest a focal form of SPS. Clinical and immunological findings indicate that SPS is a heterogeneous disease, suggesting the need to redefine its diagnostic criteria. Definition of the range of clinical expression and immunological profiles could be important for the clinical management of these patients.
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Affiliation(s)
- M Fiol
- Department of Neurology, Dr. Raúl Carrea Institute for Neurological Research (FLENI), Buenos Aires, Argentina
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Nogués M, Pardal A, Barroso F, Gonzalez JV. Periodic limb movements in sleep: state-dependent excitability of the spinal flexor reflex. Neurology 2000; 55:1243-4. [PMID: 11071520 DOI: 10.1212/wnl.55.8.1243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Reisin RC, Martínez O, Morán M, Rovira M, Roccatagliata G, Pardal A, de la Balze AE. Thyrotoxic periodic paralysis in caucasians. Report of 8 cases. Neurologia 2000; 15:222-5. [PMID: 11002697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND Periodic paralysis is a well known complication of thytotoxicosis in Chinese and Japanese patients, but has been considered extremely rare in caucasians. PATIENTS AND METHODS Between 1991 and 1996, we admitted 8 caucasian patients to our Hospital due to thyrotoxic periodic paralysis. We retrospectively analysed their clinical manifestations. RESULTS All the patients were males. Their attacks started at night or early after awakening, frequently triggered by a high carbohydrate diet and physical exertion. Myalgias and flaccid weakness predominated over proximal leg muscles, sparing bulbar and respiratory musculature. Reflexes were brisk at the onset of the attack and reduced or absent during the course of the episode. Prior to diagnosis patients presented 1-5 attacks of thyrotoxic periodic paralysis each lasting 1-96 hours. Hypokalemia was documented in 6 patients. The episodes of periodic paralysis led to the diagnosis of a previously unsuspected thyrotoxicosis in 6 patients. In the other 2 patients the diagnosis of the thyroid dysfunction preceded the periodic paralysis. Attacks resolved after treatment of the hyperthyroid state. CONCLUSIONS Thyrotoxic periodic paralysis is an under-diagnosed but probably frequent complication of hyperthyroidism in caucasians. Early recognition of the attacks is essential to investigate and treat the underlying thyroid dysfucntion whose symptoms are usually mild. The episodes of periodic paralysis resolve with the correction of the hyperthyroidism.
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Affiliation(s)
- R C Reisin
- Neurology Service, Hospital Británico, Buenos Aires, Argentina
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Abstract
Twenty-six patients with syringomyelia were studied with polysomnography to determine the frequency of periodic limb movements (PLM) and its relationship to the presence of a Chiari anomaly, the severity of corticospinal tract involvement, and localization of the syrinx. Sixteen patients showed PLM in stages I and II of non-REM sleep and three PLM also while awake. There were no statistically significant differences in overall disability, corticospinal signs, presence of an associated Chiari anomaly, and disease duration between patients with and without PLM, although there was a trend for patients with PLM to have more severe disease. There was preservation of the lumbosacral enlargement of the spinal cord by the syrinx in all patients with PLM. The latency delay between lower and upper limb muscles was suggestive of conduction along propriospinal pathways. Syringomyelia may lead to an abnormal state of spinal hyperexcitability favoring the appearance of PLM. Detailed magnetic resonance image studies of patients with different localizations of the syrinx cavities may help to determine which tracts are involved in the production of PLM.
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Affiliation(s)
- M Nogués
- Department of Clinical Neurophysiology, Raul Carrea Institute for Neurological Research (FLENI), Buenos Aires, Argentina
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Reisin R, Martinez O, Moran M, Rovira M, Pardal A, Rocatagliata G, de la Balze E. 3-24-05 Thyrotoxic periodic paralysis in Caucasians. Report of 8 cases. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85716-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zurrú M, Pardal A, Rotmistrovsky D, Seslever G, Gatto E. 5-39-10 Central hyperventilation syndrome secondary to brainstem glioma. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86531-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pardal A, Gatto E, Reisin R, Fernandez Pardal M. 2-30-20 Cortical silent period in de novo Parkinson's disease. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85398-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Affiliation(s)
- R Reisin
- Department of Neurology, Hospital Británico, Buenos Aires, Argentina
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Paradiso G, Pardal A, Fernández Pardal MM, Micheli F, de Arbelaiz R. [Evoked potentials of the trigeminal nerve: a new technic]. Arch Neurobiol (Madr) 1987; 50:81-7. [PMID: 3606308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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