7 documents found, page 1 of 1
Transcranial direct current stimulation decreases P3 amplitude and inherent Del...
Mendes, Augusto J.; Galdo-Álvarez, Santiago; Lema, Alberto; Carvalho, Sandra; Leite, JorgeThe inability to wait for a target before initiating an action (i.e., waiting impulsivity) is one of the main features of addictive behaviors. Current interventions for addiction, such as transcranial Direct Current Stimulation (tDCS), have been suggested to improve this inability. Nonetheless, the effects of tDCS on waiting impulsivity and underlying electrophysiological (EEG) markers are still not clear. Ther...
Transcranial direct current stimulation decreases P3 amplitude and inherent del...
Mendes, Augusto José; Galdo-Álvarez, Santiago; Calvo, Alberto Lema; Carvalho, Sandra; Leite, JorgeThe inability to wait for a target before initiating an action (i.e., waiting impulsivity) is one of the main features of addictive behaviors. Current interventions for addiction, such as transcranial Direct Current Stimulation (tDCS), have been suggested to improve this inability. Nonetheless, the effects of tDCS on waiting impulsivity and underlying electrophysiological (EEG) markers are still not clear. Ther...
Affective picture modulation: Valence, arousal, attention allocation and motiva...
Leite, Jorge; Carvalho, Sandra; Galdo-Álvarez, Santiago; Alves, Jorge; Sampaio, Adriana; Gonçalves, Óscar F.The present study analyses the modulatory effects of affective pictures in the early posterior negativity (EPN), the late positive potential (LPP) and the human startle response on both the peripheral (eye blink EMG) and central neurophysiological levels (Probe P3), during passive affective pictures viewing. The affective pictures categories were balanced in terms of valence (pleasant; unpleasant) and arousal (...
The emotional movie database (EMDB): a self-report and psychophysiological study
Carvalho, Sandra; Leite, Jorge; Galdo-Álvarez, Santiago; Gonçalves, Óscar F.Film clips are an important tool for evoking emotional responses in the laboratory. When compared with other emotionally potent visual stimuli (e.g., pictures), film clips seem to be more effective in eliciting emotions for longer periods of time at both the subjective and physiological levels. The main objective of the present study was to develop a new database of affective film clips without auditory content...
Psychophysiological correlates of sexually and non-sexually motivated attention...
Carvalho, Sandra; Leite, Jorge; Galdo-Álvarez, Santiago; Gonçalves, Óscar F.Some authors have speculated that the cognitive component (P3) of the Event-Related Potential (ERP) can function as a psychophysiological measure of sexual interest. The aim of this study was to determine if the P3 ERP component in a workload task can be used as a specific and objective measure of sexual motivation by comparing the neurophysiologic response to stimuli of motivational relevance with different le...
Abnormal processing of emotional prosody in Williams syndrome: an event-related...
Pinheiro, Ana P.; Galdo-Álvarez, Santiago; Rauber, Andréia Schurt; Sampaio, Adriana; Niznikiewicz, Margaret; Gonçalves, Óscar F.Williams syndrome (WS), a neurodevelopmental genetic disorder due to a microdeletion in chromosome 7, is described as displaying an intriguing socio-cognitive phenotype. Deficits in prosody production and comprehension have been consistently reported in behavioral studies. It remains, however, to be clarified the neurobiological processes underlying prosody processing in WS. This study aimed at characterizing t...
Electrophysiological correlates of semantic processing in Williams syndrome
Pinheiro, Ana P.; Galdo-Álvarez, Santiago; Sampaio, Adriana; Niznikiewicz, Margaret; Gonçalves, Óscar F.Williams syndrome (WS), a genetic neurodevelopmental disorder due to microdeletion in chromosome 7, has been described as a syndrome with an intriguing socio-cognitive phenotype. Cognitively, the relative preservation of language and face processing abilities coexists with severe deficits in visual-spatial tasks, as well as in tasks involving abstract reasoning. However, in spite of early claims of the independ...