An ERP study on facial emotion processing in young people with subjective memory complaints

Subjective memory complaints (SMCs) are commonly related to aging, but they are also presented by young adults. Their neurophysiological mechanisms are not thoroughly understood, although some aspects related to affective state have been mentioned. Here, we investigated whether facial emotion processing is different in young people with (n = 41) and without (n = 39) SMCs who were exposed to positive, negative, and neutral faces, by recording the event-related potential (ERP) activity. From the ERP activity, the N170 (an index of face processing) and the LPP (an index of motivated attention) components were extracted. Regarding the N170, results showed less amplitude for positive and neutral faces in the participants with SMCs than in those without SMCs. Moreover, women with SMCs displayed longer latencies for neutral faces than women without SMCs. No significant differences were found between the groups in the LPP component. Together, our findings suggest deficits in an early stage of facial emotion processing in young people with SMCs, and they emphasize the importance of further examining affective dimensions. © 2021, The Author(s)

Preliminar characterization of a new virus isolated from the spinal fluid of patients with meningitis in São Paulo, Brazil Caracterização preliminar de um novo vírus isolado de liquor de pacientes com meningite asséptica em São Paulo, Brasil

A total of 138 patients with the age of 4 months to 57 years were attended in different hospitals of São Paulo State with aseptic meningitis. A probable new agent was isolated from the cerebrospinal fluid of 35 of 53 specimens examined. Replication of the agent with similar characteristics was detected by CPE produced in the MDCK cell line. Virus-like particles measuring about 40 nm in diameter were observed by negative staining electron microscopy. No hemaglutinating activity was detected at pH 7.2 by using either human, guinea pig, chicken and at pH ranged 6.0 - 7.2 with goose red blood cells. The agent was not pathogenic to newborn or adult mice. Virus infectivity as measured by CPE was sensitive to chloroform and not inhibited by BuDR, suggesting that agent is an enveloped virus with RNA genome.<br>De dezembro de 1982 a março de 1983 um total de 138 pacientes com idade de 4 meses a 57 anos foram atendidos em diferentes hospitais de São Paulo com sintomas de meningite asséptica. Um agente transmissível foi isolado de 35 das 53 amostras de liquor. A replicação desse novo vírus ou de um grupo de vírus relacionados antigenicamente com características semelhantes foi detectada através do efeito citopático produzido em cultura de células de MDCK. O agente isolado demonstrou ter um diâmetro em torno de 40 nm quando examinado ao microscópio eletrônico através da coloração negativa. Nenhuma atividade hemaglutinante foi detectada em pH 7,2 com hemácias humanas de cobaias ou de galinha e em pH 6,0 - 7,2 com hemácias de ganso. Esse agente não se mostrou patogênico ao camundongo recém-nascido e adulto, era sensível ao clorofórmio e não foi inibido pelo BuDR, o que indica conter o genoma RNA