Browsing by Author "Paiva, Tiago Oliveira"
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- Does attention to cardiac sensations modulate heartbeat-evoked potentials even after controlling for cognitive demands?Publication . Braga, Patrícia Vilela; Vieira, Beatriz; Carina, Fernandes; Barbosa, Fernando; Santos, Fernando Ferreira; Pereira, Mariana R.; Rocha, Nuno Barbosa; Mazer, Prune; Pasion, Rita; Schütz-Bosbach, Simone; Paiva, Tiago Oliveira; Campos, Carlos; Campos, Carlos; Rocha, Nuno; Mazer, PruneHeartbeat-evoked potentials (HEP) have been shown to be modulated by attentional focus (cardiac vs. exteroceptive attention), suggesting that HEP are a neural correlate of interoceptive prediction errors. However, this effect has not been consistently replicated, and differences in cognitive effort when contrasting interoceptive vs. exteroceptive attention may be a confounding factor. We devised a modified Heartbeat Attention Task to examine whether cardiac attention can modulate HEP amplitude even when cognitive demands are matched across interoceptive and exteroceptive conditions. In exteroceptive blocks, subjects were required to count subtle bursts of volume increase embedded within a continuous white noise. The bursts’ volume was individually tailored for each participant (near absolute threshold) and were presented in a rhythmic pattern replicating a typical heart rate. In interoceptive blocks, participants were asked to count their heartbeats, whilst the white noise was still presented, ensuring that the neural effects were driven by the attention shift rather than sensory changes. The task was first completed by 50 participants (25F; 28.44y) during a 9-electrode EEG recording: frontal, central and parietal sites. No significant differences were found regarding counted heartbeats (M=122.00) vs white noise bursts (M=118.86) as well as on perceived attentional efforts (heart M=65.00 vs bursts M=67.00), indicating similar task demands across conditions. No significant differences between conditions were found on HEP amplitude across all electrodes (p > .137 for all), suggesting no attentional modulation of HEP amplitude after accounting for cognitive demands. Due to the reduced number of electrodes, a follow-up sample of 26 participants (13F; 21.73y) completed the task using a new EEG geodesic 64-channel sensor net. This dataset is currently under processing and will allow for a more comprehensive data-driven analytic approach (cluster-based permutation test) to ensure whether the attentional modulation of HEP amplitude is indeed absent when accounting for cognitive demands.
- EEG signatures during pregnancy and their role on parenting-related measures: scoping reviewPublication . Braga, Patrícia Vilela; Amaoui, Sofia; Lamela, Diogo; Jongenelen, Inês; Costa, Raquel; Oliveira, Jorge; Pasion, Rita; Pinto, Tiago Miguel; Paiva, Tiago Oliveira; Campos, Carlos; Campos, CarlosThis scoping review aims to map and synthesise the current research evidence targeting the electroencephalography (EEG) neural correlates during pregnancy and its association with parenting-related measures during pregnancy and postpartum period. Pregnancy is characterised by a wide range of biological changes associated with adaptation to parenthood. A growing body of literature has examined the neural correlates of pregnancy using EEG, revealing distinct patterns in pregnant females, with these EEG metrics changing throughout gestation and postpartum. Due to the heterogeneity of the evidence, the current literature lacks an organised synthesis, making it difficult to understand the neural correlates during pregnancy and their association with parentingrelated measures during pregnancy and postpartum period. Studies will be included if they contain a quantitative EEG metric in their assessment in pregnant women. Studies will be included if they involve clinical or community samples. No sociodemographic, obstetric, or health exclusion criteria will be applied. The scoping review will be conducted following the Joanna Briggs Institute’s (JBI) guidelines and will be reported following Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines. Searches will be conducted in 7 databases (Cochrane for Trials and Reviews, PsycInfo, PubMed, Psychological and Behavioural Science Collection, Scopus and Web of Science Core Collection) for articles published in English, Portuguese, or Spanish with no limitation on the region or publication time frame. Two independent reviewers will screen each record following a standardised flowchart using asreview lab. Data extraction will be performed by the two reviewers using charting tables in Excel. Disagreements at any step will be resolved via consensus or by a third reviewer. Results will be reported using tables and graphs along with a descriptive analysis, according to the research questions.