RESUMO
Subject's own name (SON) is widely used in both daily life and the clinic. Event-related potential (ERP)-based studies have previously detected several ERP components related to SON processing; however, as most of these studies used SON as a deviant stimulus, it was not possible to determine whether these components were SON-specific. To identify SON-specific ERP components, we adopted a passive listening task with EEG data recording involving 25 subjects. The auditory stimuli were a SON, a friend's name (FN), an unfamiliar name (UN) selected from other subjects' names and seven different unfamiliar names (DUNs). The experimental settings included Equal-probabilistic, Frequent-SON, Frequent-FN and Frequent-UN conditions. The results showed that SON consistently evoked a frontocentral SON-related negativity (SRN) within 210-350 ms under all conditions, which was not detected with the other names. Meanwhile, a late positive potential evoked by SON was found to be affected by stimulus probability, showing no significant difference between the SON and the other names in the Frequent-SON condition, or between the SON and a FN in the Frequent-UN condition. Taken together, our findings indicated that the SRN was a SON-specific ERP component, suggesting that distinct neural mechanism underly the processing of a SON.
Assuntos
Eletroencefalografia , Nomes , Humanos , Eletroencefalografia/métodos , Estimulação Acústica/métodos , Potenciais Evocados/fisiologia , ProbabilidadeRESUMO
Current studies have shown that perception of subject's own name (SON) involves multiple multimodal brain regions, while activities in unimodal sensory regions (i.e., primary auditory cortex) and their interaction with multimodal regions during the self-processing remain unclear. To answer this, we combined multivariate pattern analysis and dynamic causal modelling analysis to explore the regional activation pattern and inter-region effective connection during the perception of SON. We found that SON and other names could be decoded from the activation pattern in the primary auditory cortex. In addition, we found an excitatory effect of SON on connections from the anterior insula/inferior frontal gyrus to the primary auditory cortex, and to the temporoparietal junction. Our findings extended the current knowledge of self-processing by showing that primary auditory cortex could discriminate SON from other names. Furthermore, our findings highlighted the importance of influence of the insula on the primary auditory cortex during self-processing.
Assuntos
Córtex Auditivo , Nomes , Humanos , Eletroencefalografia , Estimulação Acústica , Córtex Auditivo/diagnóstico por imagem , Encéfalo/fisiologia , Mapeamento Encefálico , Imageamento por Ressonância MagnéticaRESUMO
O presente artigo tem como objetivo apresentar a construção metodológica desenvolvida em uma pesquisa de mestrado, na qual sustentamos a escrita de cenas como método de pesquisa da escuta clínica. As cenas do trabalho em questão foram recolhidas ao longo do tempo, no contorno da experiência de um projeto de extensão universitária de atenção à infância e adolescência em situação de vulnerabilidade social, situado em uma comunidade periférica. Apresentamos, neste texto, as interrogações que se elaboraram em torno da escolha pelo trabalho com cenas, e compartilhamos o resgate histórico dessas como um método de escrever a clínica, bem como a retomada de sua análise a partir da tradição psicanalítica. Amparadas nesta teoria e em leituras e contribuições do filósofo francês Jacques Derrida, embasamos a noção de que a cena se constitui como um lugar de produção, ao engendrar a configuração particular de elementos significantes nos processos de subjetivação e de construção social. A cena não é, então, compreendida aqui como uma representação do que acontece na clínica, mas como um modo de produzir a escuta e os seus processos de investigação.(AU)
This article aims to present the methodological construction developed in a master's research, in which the writing of scenes as a method of clinical listening research was endorsed. The scenes from the study in question were collected over time, from the experience gained in a project conducted within a university extension program on care in childhood and adolescence in social vulnerability, in a peripheral community. In this study, we present some questions that were elaborated surrounding the choices of working with scenes; and we share the historical rescue of this work as a method of writing on clinic practices and resuming their analysis from the psychoanalytic tradition. Based on the psychoanalytic theory and on the readings and contributions of the French philosopher Jacques Derrida, we corroborate the notion that the scene is constituted as a place of production, engendering the particular configuration of significant elements in the processes of subjectivation and social construction. Here, the scene is not a representation of clinical practice but one mode of producing listening and its research processes.(AU)
Este artículo tiene como objetivo presentar la construcción metodológica desarrollada en una investigación de maestría, en la que sostenemos la escritura de escenas como método de investigación de la escucha clínica. Las escenas del trabajo en cuestión se recogieron a lo largo del tiempo desde la experiencia en un proyecto de extensión universitario de atención a la niñez y adolescencia en situación de vulnerabilidad social aplicado en una comunidad periférica. En este texto, presentamos los interrogantes que se elaboraron en torno a la elección por el trabajo con escenas y compartimos el rescate histórico de las mismas como un método de escribir la clínica y la reanudación del análisis a partir de la tradición psicoanalítica. Amparadas en el psicoanálisis y en lecturas y contribuciones del filósofo francés Jacques Derrida, nos basaremos en la noción de que la escena se constituye como un lugar de producción, engendrando la configuración particular de elementos significantes en los procesos de subjetivación y de construcción social. La escena no es aquí una representación de lo que pasa en la clínica, sino un modo de producir escucha y sus procesos de investigación.(AU)
Assuntos
Humanos , Feminino , Pré-Escolar , Psicanálise , Criança , Proteção da Criança , Equipamentos e Provisões , Metodologia como Assunto , Refeições , Vulnerabilidade Social , Parapsicologia , Relações Pais-Filho , Pais , Paternidade , Jogos e Brinquedos , Ludoterapia , Pobreza , Fenômenos Psicológicos , Teoria Psicológica , Psicologia , Psicologia Clínica , Terapia da Realidade , Bode Expiatório , Instituições Acadêmicas , Relações entre Irmãos , Classe Social , Isolamento Social , Justiça Social , Responsabilidade Social , Apoio Social , Serviço Social , Fala , Superego , Inconsciente Psicológico , Comportamento , Áreas de Pobreza , Uso de Resíduos Sólidos , Criança Abandonada , Maus-Tratos Infantis , Defesa da Criança e do Adolescente , Cuidado da Criança , Desenvolvimento Infantil , Deficiências do Desenvolvimento , Características de Residência , Higiene , Saúde da Criança , Responsabilidade Legal , Adolescente , Poder Familiar , Estágio Clínico , Assistência Integral à Saúde , Estado de Consciência , Vida , Crime , Intervenção em Crise , Afeto , Cultura , Narração , Fraldas Infantis , Sujeitos da Pesquisa , Agressão , Violação de Direitos Humanos , Sonhos , Educação , Ego , Emprego , Mercado de Trabalho , Ética , Nutrição da Criança , Bullying , Marginalização Social , Criança Acolhida , Privilégio Social , Liberdade , Teoria Freudiana , Status Econômico , Respeito , Regras de Decisão Clínica , Inclusão Social , Instabilidade Habitacional , Baixo Nível Socioeconômico , História , Direitos Humanos , Id , Lateralidade Funcional , Amor , Memória , Memória de Curto Prazo , Moral , NomesRESUMO
The heritage of Slovenian house names and surnames reflects, among others, the former medicine and pharmaceutical occupations, midwifery, and folk medicine practices, and besides that, also health status and illnesses of people. Surnames, which are especially strongly intertwined with family, local and social history, are closely related to folk medicine and magic. Unlike house names (vulgo), which are the usual nicknames for physical and mental characteristics and abilities, surnames denote medical occupations and medicinal folk practice as such. According to the most recent data (as of January 1, 2020) of The Statistical Office of the Republic of Slovenia, at least 40 surnames reminiscent former medical or pharmaceutical professions. These newly discovered digital data in open access are precious for the history of medicine because they allow comparing surnames geographically, by frequency, and through the time.
Assuntos
História da Medicina , História da Farmácia , Nomes , Médicos/história , Animais , Educação Médica/história , História do Século XVI , História do Século XVII , História do Século XVIII , História do Século XIX , Humanos , Medicina Tradicional/história , EslovêniaRESUMO
Odor naming is enhanced in communities where communication about odors is a central part of daily life (e.g., wine experts, flavorists, and some hunter-gatherer groups). In this study, we investigated how expert knowledge and daily experience affect the ability to name odors in a group of experts that has not previously been investigated in this context-Iranian herbalists; also called attars-as well as cooks and laypeople. We assessed naming accuracy and consistency for 16 herb and spice odors, collected judgments of odor perception, and evaluated participants' odor meta-awareness. Participants' responses were overall more consistent and accurate for more frequent and familiar odors. Moreover, attars were more accurate than both cooks and laypeople at naming odors, although cooks did not perform significantly better than laypeople. Attars' perceptual ratings of odors and their overall odor meta-awareness suggest they are also more attuned to odors than the other two groups. To conclude, Iranian attars-but not cooks-are better odor namers than laypeople. They also have greater meta-awareness and differential perceptual responses to odors. These findings further highlight the critical role that expertise and type of experience have on olfactory functions.
Assuntos
Aptidão/fisiologia , Julgamento/fisiologia , Odorantes , Percepção Olfatória/fisiologia , Olfato/fisiologia , Adulto , Feminino , Humanos , Irã (Geográfico) , Masculino , Pessoa de Meia-Idade , Nomes , Adulto JovemRESUMO
Purpose This study investigated attentional shifting in preschool children with specific language impairment (SLI) compared to their typically developing peers. Children's attentional shifting capacity was assessed by varying attentional demands. Method Twenty-five preschool children with SLI and 25 age-matched, typically developing controls participated. A behavioral task measuring attentional shifting within and across multiple dimensions (auditory, linguistic, and visual) was employed. Demands on attentional shifting were increased based on input dimension (low load: staying within dimension; medium load: shifting between 2 dimensions; and high load: shifting among 3 dimensions). Results Compared to controls, the group with SLI made more erroneous responses and exhibited longer response times. Although both groups' error rates were similarly affected by shifting compared to nonshifting trials, their response speed was not. The group with SLI exhibited a larger comparative decrement to their response speed in the high-attentional load condition. Discussion When demands on attentional shifting increase, children with SLI struggle to shift their attention as efficiently to changing stimuli as their unimpaired peers. Potential implications for the assessment and treatment of this population are discussed.
Assuntos
Atenção , Transtorno Específico de Linguagem/psicologia , Estimulação Acústica , Estudos de Casos e Controles , Pré-Escolar , Cognição/fisiologia , Discriminação Psicológica/fisiologia , Feminino , Audição/fisiologia , Humanos , Idioma , Testes de Linguagem , Masculino , Nomes , Estimulação Luminosa , Fala/fisiologia , VocabulárioRESUMO
OBJECTIVES: A chronic illness/condition typically generates some disturbance in people. In the context of this turmoil, some individuals might make a choice to use healing options outside of regular allopathic medicine. This study is an attempt to understand the processes through which health practices/healing options get named as Complementary and Alternative Medicine (CAM) by chronic illness patients. DESIGN AND SETTING: This study used a grounded theory methodology to collect and analyze data. Following the principles of theoretical sampling, in-depth face to face interviews were conducted with a total of 21 individuals with varied chronic illnesses/conditions residing in Miami. The study sample constituted of 16 women and 5 men, belonging to different ethnicities and using varied health practices and healing options. FINDINGS: Through the findings it is suggested, that there is nothing definite about the definition of CAM. Individuals name and rename activities and health practices as CAM based on their perceptions and the way they approach such health practices/healing options. The naming process of CAM is contextual and even food and activities or pastimes can get named as CAM if they hold meaning for a person. CONCLUSION: Research in the US continually shows that CAM is widely used, but what actually constitutes CAM differs based on whom you ask. Whether what can be named as CAM should be circumscribed or left open is a debate that has policy implications and needs to be explored by future researchers.
Assuntos
Doença Crônica/psicologia , Doença Crônica/terapia , Terapias Complementares/classificação , Terapias Complementares/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Nomes , Narração , Pesquisa QualitativaRESUMO
We examined the effect of hearing two types of self-relevant words, one's own name and the name of others, on vigilant attention, arousal, and subjective sleepiness during performing the Psychomotor Vigilance Test (PVT). Participants performed the PVT under three experimental conditions, (a) hearing own full name (high self-relevant condition), (b) hearing other's name (low self- relevant condition) and (c) the control condition with no stimuli. Participants heard the names every 20 sec. Self-relevance was assessed before the experiment using the self-relevance scale. The results of the behavioral effects are relatively small and not consistently supported by all of the performance indicators. A tentative conclusion, based on the overall pattern of results, is that (1) arousal increased by hearing a name, regardless of its self-relevance, and (2) hearing less self-relevant stimuli such as other's name had a distractive effect on ongoing task performance, although it increased arousal, being aware that further experiments are urgently necessary.
Assuntos
Nível de Alerta/fisiologia , Audição/fisiologia , Nomes , Análise e Desempenho de Tarefas , Estimulação Acústica , Adulto , Atenção , Eletroencefalografia , Feminino , Humanos , Masculino , Tempo de Reação/fisiologia , Vigília/fisiologia , Adulto JovemRESUMO
The goal of the present study was to examine the effect of listening to self-relevant words (i.e., one's own name) on vigilant attention, arousal, and subjective sleepiness during performance of a psychomotor vigilance test (PVT). Twenty-one participants aged 20-26 years (22.2 ± 1.76) performed a PVT in four experimental conditions: one in which their own full name was pronounced every 20 s in the stimuli epochs, one in which their full name was pronounced in inverted form, one in which beeps were played, and a control condition with no stimuli. Listening to personal names reduced attentional lapses during the PVT (i.e., the number of reaction times no less than 500 ms). The results are a first step in applying the name effect to technologies and devices aimed at maintaining arousal levels and preventing accidents during a monotonous task, such as driving.
Assuntos
Estimulação Acústica , Nível de Alerta/fisiologia , Atenção/fisiologia , Nomes , Desempenho Psicomotor , Vigília/fisiologia , Prevenção de Acidentes , Adulto , Condução de Veículo , Eletroencefalografia , Feminino , Humanos , Masculino , Testes Neuropsicológicos , Tempo de Reação , Adulto JovemRESUMO
The classical model of the declarative memory system describes the hippocampus and its interactions with representational brain areas in posterior neocortex as being essential for the formation of long-term episodic memories. However, new evidence suggests an extension of this classical model by assigning the medial prefrontal cortex (mPFC) a specific, yet not fully defined role in episodic memory. In this study, we utilized 1H magnetic resonance spectroscopy (MRS) and psychophysiological interaction (PPI) analysis to lend further support for the idea of a mnemonic role of the mPFC in humans. By using MRS, we measured mPFC γ-aminobutyric acid (GABA) and glutamate/glutamine (GLx) concentrations before and after volunteers memorized face-name association. We demonstrate that mPFC GLx but not GABA levels increased during the memory task, which appeared to be related to memory performance. Regarding functional connectivity, we used the subsequent memory paradigm and found that the GLx increase was associated with stronger mPFC connectivity to thalamus and hippocampus for associations subsequently recognized with high confidence as opposed to subsequently recognized with low confidence/forgotten. Taken together, we provide new evidence for an mPFC involvement in episodic memory by showing a memory-related increase in mPFC excitatory neurotransmitter levels that was associated with better memory and stronger memory-related functional connectivity in a medial prefrontal-thalamus-hippocampus network.
Assuntos
Mapeamento Encefálico , Ácido Glutâmico/metabolismo , Glutamina/metabolismo , Hipocampo/diagnóstico por imagem , Memória/fisiologia , Córtex Pré-Frontal/metabolismo , Tálamo/diagnóstico por imagem , Adulto , Aprendizagem por Associação , Correlação de Dados , Face , Feminino , Hipocampo/metabolismo , Humanos , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Espectroscopia de Ressonância Magnética , Masculino , Nomes , Estimulação Luminosa , Córtex Pré-Frontal/diagnóstico por imagem , Tálamo/metabolismo , Adulto JovemRESUMO
Despite significant advances at the level of basic research, the characterization of higher-level processes in Rett and MECP2 Duplication syndrome remains understudied. In this pilot study, we assessed social-emotional information processing by testing whether children (ages 4-12years) with Rett (n=9) and MECP2 Duplication syndrome (n=7) distinguished their own spoken name from other names. We hypothesized that own and familiar names would elicit more positive parietal P300 responses than unknown names, and that the groups would have different neural responses to these stimuli. The MECP2 Duplication group partially mirrored the parietal responses to own name observed in typically developing participants, and better name discrimination correlated with more adaptive behaviors. Conversely, participants with RTT did not resemble the typical group, and showed greater responses to close other names at frontal/central regions. These results may reflect the different consequences of too much (MECP2 Duplication) vs. too little (RTT) MeCP2 protein.
Assuntos
Estimulação Acústica/métodos , Percepção Auditiva/fisiologia , Potenciais Evocados Auditivos/fisiologia , Deficiência Intelectual Ligada ao Cromossomo X/fisiopatologia , Nomes , Síndrome de Rett/fisiopatologia , Criança , Pré-Escolar , Eletroencefalografia/métodos , Feminino , Humanos , Masculino , Deficiência Intelectual Ligada ao Cromossomo X/diagnóstico , Projetos Piloto , Estudo de Prova de Conceito , Síndrome de Rett/diagnóstico , Comportamento SocialRESUMO
Prior multisensory experience influences how we perceive our environment, and hence how memories are encoded for subsequent retrieval. This study investigated if audiovisual (AV) integration and associative memory formation rely on overlapping or distinct processes. Our functional magnetic resonance imaging results demonstrate that the neural mechanisms underlying AV integration and associative memory overlap substantially. In particular, activity in anterior superior temporal sulcus (STS) is increased during AV integration and also determines the success of novel AV face-name association formation. Dynamic causal modeling results further demonstrate how the anterior STS interacts with the associative memory system to facilitate successful memory formation for AV face-name associations. Specifically, the connection of fusiform gyrus to anterior STS is enhanced while the reverse connection is reduced when participants subsequently remembered both face and name. Collectively, our results demonstrate how multisensory associative memories can be formed for subsequent retrieval.
Assuntos
Aprendizagem por Associação/fisiologia , Percepção Auditiva/fisiologia , Reconhecimento Facial/fisiologia , Memória/fisiologia , Nomes , Lobo Temporal/fisiologia , Estimulação Acústica , Adulto , Mapeamento Encefálico , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Estimulação Luminosa , Reconhecimento Psicológico , Adulto JovemRESUMO
The attribution of uniquely human characteristics to the outgroup may favor the search for contact with outgroup members and, vice versa, contact experiences may improve humanity attributions to the outgroup. To explore this bidirectional relationship, two studies were performed. In Study 1, humanity perceptions were manipulated using subliminal conditioning. Two experimental conditions were created. In the humanization condition, the unconditioned stimuli (US) were uniquely human words; in the dehumanization condition, the US were non-uniquely human and animal words. In both conditions, conditioned stimuli were typical outgroup faces. An approach/avoidance technique (the manikin task) was used to measure the willingness to have contact with outgroup members. Findings showed that in the humanization condition participants were faster in approaching than in avoiding outgroup members: closeness to the outgroup was preferred to distance. Latencies of approach and avoidance movements were not different in the dehumanization condition. In Study 2, contact was manipulated using the manikin task. One approach (contact) condition and two control conditions were created. The attribution of uniquely human traits to the outgroup was stronger in the contact than in the no-contact conditions. Furthermore, the effect of contact on humanity attributions was mediated by increased trust toward the outgroup. Thus, findings demonstrate the bidirectionality of the relationship between contact and humanity attributions. Practical implications of findings are discussed.
Assuntos
Desumanização , Processos Grupais , Características Humanas , Percepção Social , Estimulação Acústica , Animais , Aprendizagem da Esquiva , Condicionamento Psicológico , Face , Jogos Experimentais , Humanos , Relações Interpessoais , Nomes , Estimulação Luminosa , Distribuição Aleatória , Tempo de Reação , Estereotipagem , Estimulação Subliminar , Comportamento Verbal , Jogos de Vídeo , Adulto JovemRESUMO
Information processing has been suggested to depend on the current state of the brain as well as stimulus characteristics (e.g. salience). We compared processing of salient stimuli (subject's own names [SONs] and angry voice [AV] stimuli) to processing of unfamiliar names (UNs) and neutral voice (NV) stimuli across different vigilance stages (i.e. wakefulness as well as sleep stages N1 and N2) by means of event-related oscillatory responses during wakefulness and a subsequent afternoon nap. Our findings suggest that emotional prosody and self-relevance drew more attentional resources during wakefulness with specifically AV stimuli being processed more strongly. During N1, SONs were more arousing than UNs irrespective of prosody. Moreover, emotional and self-relevant stimuli evoked stronger responses also during N2 sleep suggesting a 'sentinel processing mode' of the brain during this state of naturally occurring unconsciousness. Finally, this initial preferential processing of salient stimuli during N2 sleep seems to be followed by an inhibitory sleep-protecting process, which is reflected by a K-complex-like response.
Assuntos
Estimulação Acústica/métodos , Emoções/fisiologia , Potenciais Evocados/fisiologia , Sono/fisiologia , Inconsciente Psicológico , Adulto , Ira , Atenção/fisiologia , Encéfalo/fisiologia , Ondas Encefálicas/fisiologia , Feminino , Voluntários Saudáveis , Humanos , Masculino , Nomes , Vigília/fisiologia , Adulto JovemRESUMO
A series of experiments demonstrated novel effects of amplitude envelope on associative memory, with tones exhibiting naturally decaying amplitude envelopes (e.g., those made by two wine glasses clinking) better associated with target objects than amplitude-invariant tones. In Experiment 1 participants learned associations between household objects and 4-note tone sequences constructed of spectrally matched pure tones with either "flat" or "percussive" amplitude envelopes. Those hearing percussive tones correctly recalled significantly more sequence-object associations. Experiment 2 demonstrated that participants hearing percussive tones learned the associations more quickly. Experiment 3 used "reverse percussive" tones (percussive tones played backwards) to test whether differences in overall energy might account for this effect, finding they did not lead to the same level of performance as percussive tones. Experiment 4 varied the envelope at encoding and retrieval to determine which stage of the task was most affected by the envelope manipulation. Participants hearing percussive tones at both encoding and retrieval performed significantly better than the other three groups (i.e., flat at encoding/percussive at retrieval, etc.). We conclude that amplitude envelope plays an important role in learning and memory, a finding with relevance to psychological research on audition and associative memory, as well as practical relevance for improving human-computer interface design.
Assuntos
Associação , Percepção Auditiva/fisiologia , Rememoração Mental/fisiologia , Nomes , Reconhecimento Psicológico/fisiologia , Estimulação Acústica , Análise de Variância , Feminino , Humanos , Masculino , Dinâmica não Linear , Estimulação Luminosa , Psicoacústica , Estudantes , UniversidadesRESUMO
Understanding the neural processes that underlie learning to read can provide a scientific foundation for literacy education but studying these processes in real-world contexts remains challenging. We present behavioural data from adult participants learning to read artificial words and name artificial objects over two days. Learning profiles and generalisation confirmed that componential learning of visual-verbal associations distinguishes reading from object naming. Functional MRI data collected on the second day allowed us to identify the neural systems that support componential reading as distinct from systems supporting holistic visual-verbal associations in object naming. Results showed increased activation in posterior ventral occipitotemporal (vOT), parietal, and frontal cortices when reading an artificial orthography compared to naming artificial objects, and the reverse profile in anterior vOT regions. However, activation differences between trained and untrained words were absent, suggesting a lack of cortical representations for whole words. Despite this, hippocampal responses provided some evidence for overnight consolidation of both words and objects learned on day 1. The comparison between neural activity for artificial words and objects showed extensive overlap with systems differentially engaged for real object naming and English word/pseudoword reading in the same participants. These findings therefore provide evidence that artificial learning paradigms offer an alternative method for studying the neural systems supporting language and literacy. Implications for literacy acquisition are discussed.
Assuntos
Associação , Mapeamento Encefálico , Encéfalo/fisiologia , Rememoração Mental/fisiologia , Leitura , Aprendizagem Verbal/fisiologia , Estimulação Acústica , Adolescente , Adulto , Encéfalo/diagnóstico por imagem , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Masculino , Nomes , Oxigênio/sangue , Reconhecimento Visual de Modelos , Fonética , Estimulação Luminosa , Tempo de Reação , Vocabulário , Adulto JovemRESUMO
Estimating cognitive abilities in patients suffering from Disorders of Consciousness remains challenging. One cognitive task to address this issue is the so-called own name paradigm, in which subjects are presented with first names including the own name. In the active condition, a specific target name has to be silently counted. We recorded EEG during this task in 24 healthy controls, 8 patients suffering from Unresponsive Wakefulness Syndrome (UWS) and 7 minimally conscious (MCS) patients. EEG was analysed with respect to amplitude as well as phase modulations and connectivity. Results showed that general reactivity in the delta, theta and alpha frequency (event-related de-synchronisation, ERS/ERD, and phase locking between trials and electrodes) toward auditory stimulation was higher in controls than in patients. In controls, delta ERS and lower alpha ERD indexed the focus of attention in both conditions, late theta ERS only in the active condition. Additionally, phase locking between trials and delta phase connectivity was highest for own names in the passive and targets in the active condition. In patients, clear stimulus-specific differences could not be detected. However, MCS patients could reliably be differentiated from UWS patients based on their general event-related delta and theta increase independent of the type of stimulus. In conclusion, the EEG signature of the active own name paradigm revealed instruction-following in healthy participants. On the other hand, DOC patients did not show clear stimulus-specific processing. General reactivity toward any auditory input, however, allowed for a reliable differentiation between MCS and UWS patients.
Assuntos
Atenção/fisiologia , Ondas Encefálicas/fisiologia , Transtornos Cognitivos/diagnóstico , Nomes , Autoimagem , Estimulação Acústica , Adulto , Idoso , Análise de Variância , Mapeamento Encefálico , Transtornos Cognitivos/etiologia , Transtornos da Consciência/complicações , Eletroencefalografia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
We used functional magnetic resonance imaging to investigate how attended and non-attended hearing of a subject's own name (SON) captures his or her attention. It has been reported that SON presentation activates the medial prefrontal cortex (mPFC), which is considered to be the key region for self-recognition. However, it remains unclear whether non-attended SON presentation also activates the mPFC. We hypothesized that an attended SON should activate mPFC more than a non-attended SON. To test this hypothesis, we designed an experiment in which we manipulated the task-relevance of SON; in a name-detection task, SON was a target stimulus, whereas in a tone-judgment task, SON was unrelated to the task. In each condition, identical sets of sound stimuli were presented. SON activated mPFC in the name-detection task but not in the tone-judgment task, supporting our hypothesis. In contrast, non-attended SON activated midbrain reticular formation, thalamus, insula, auditory cortex, and precuneus. We interpreted these to be related to low-level, automatic SON detection. Thus, hearing one's own name in a non-attended condition does not primarily engage the mPFC, but recruits a cortico-subcortical auditory attention network; this may account for the oft-observed salience of SON.