1,519 research outputs found
A previously unreported numph cocoon of Alphasida puncticollis on the islet of Lampione (Sicilian Channel) (Coleoptera Tenebrionidae).
In this paper we present an unusual case of cocoons produced by larvae of Tenebrionid Alphasida (Glabrasida) puncticollis
(Solier, 1836), which has been observed on the islet of Lampione (Sicilian Channel). Pupal cocoons have never been recorded for
species belonging to this genus, and their occurrence results rarely documented within the family Tenebrionidae. Some ecological implications are discussed
Social Influence and the Brain: Persuasion, Susceptibility to Influence and Retransmission
Social influence is an important topic of research, with a particularly long history in the social sciences. Recently, social influence has also become a topic of interest among neuroscientists. The aim of this review is to highlight current research that has examined neural systems associated with social influence, from the perspective of being influenced as well as influencing others, and highlight studies that link neural mechanisms with real-world behavior change beyond the laboratory. Although many of the studies reviewed focus on localizing brain regions implicated in influence within the lab, we argue that approaches that account for networks of brain regions and that integrate neural data with data beyond the laboratory are likely to be most fruitful in understanding influence
Narcissists Social Pain Seen Only in the Brain
Narcissism is a complex phenomenon, involving a level of defensive self-enhancement. Narcissists have avoidant attachment styles, maintain distance in relationships, and claim not to need others. However, they are especially sensitive to others’ evaluations, needing positive reflected appraisals to maintain their inflated self-views, and showing extreme responses (e.g. aggression) when rejected. The current study tested the hypothesis that narcissists also show hypersensitivity in brain systems associated with distress during exclusion. We measured individual differences in narcissism (Narcissistic Personality Inventory) and monitored neural responses to social exclusion (Cyberball). Narcissism was significantly associated with activity in an a priori anatomically defined social pain network (AI, dACC, and subACC) during social exclusion. Results suggest hypersensitivity to exclusion in narcissists may be a function of hypersensitivity in brain systems associated with distress, and suggests a potential pathway that connects narcissism to negative consequences for longer term physical and mental health— findings not apparent with self-report alone
Neural Prediction of Communication-Relevant Outcomes
Understanding and predicting the mechanisms and consequences of effective communication may be greatly advanced by leveraging knowledge from social and cognitive neuroscience research. We build on prior brain research that mapped mental processes, and show that information gained from neuroimaging can predict variation in communication outcomes over and above that associated with self-report. We further discuss how neural measures can complement physiological and other implicit measures. The brain-as-predictor approach can (1) allow researchers to predict individual and population level outcomes of exposure to communication stimuli with greater accuracy and (2) provide a better understanding of the mental processes underlying behaviors relevant to communication research. In this article, we give a detailed description of the brain-as-predictor approach and provide a guide for scholars interested in employing it in their research. We then discuss how the brain-as-predictor approach can be used to provide theoretical insights in communication research. Given its potential for advancing theory and practice, we argue that the brain-as-predictor approach can serve as a valuable addition to the communication science toolbox and provide a brief checklist for authors, reviewers and editors interested in using the approach
Mycobacterium tuberculosis Drives Expansion of Low-Density Neutrophils Equipped With Regulatory Activities
In human tuberculosis (TB) neutrophils represent the most commonly infected phagocyte but their role in protection and pathology is highly contradictory. Moreover, a subset of low-density neutrophils (LDNs) has been identified in TB, but their functions remain unclear. Here, we have analyzed total neutrophils and their low-density and normal-density (NDNs) subsets in patients with active TB disease, in terms of frequency, phenotype, functional features, and gene expression signature. Full-blood counts from Healthy Donors (H.D.), Latent TB infected, active TB, and cured TB patients were performed. Frequency, phenotype, burst activity, and suppressor T cell activity of the two different subsets were assessed by flow cytometry while NETosis and phagocytosis were evaluated by confocal microscopy. Expression analysis was performed by using the semi-quantitative RT-PCR array technology. Elevated numbers of total neutrophils and a high neutrophil/lymphocyte ratio distinguished patients with active TB from all the other groups. PBMCs of patients with active TB disease contained elevated percentages of LDNs compared with those of H.D., with an increased expression of CD66b, CD33, CD15, and CD16 compared to NDNs. Transcriptomic analysis of LDNs and NDNs purified from the peripheral blood of TB patients identified 12 genes differentially expressed: CCL5, CCR5, CD4, IL10, LYZ, and STAT4 were upregulated, while CXCL8, IFNAR1, NFKB1A, STAT1, TICAM1, and TNF were downregulated in LDNs, as compared to NDNs. Differently than NDNs, LDNs failed to phagocyte live Mycobacterium tuberculosis (M. tuberculosis) bacilli, to make oxidative burst and NETosis, but caused significant suppression of antigen-specific and polyclonal T cell proliferation which was partially mediated by IL-10. These insights add a little dowel of knowledge in understanding the pathogenesis of human TB
Fever with perinasal and tongue lesions: A diagnostic challenge
The diagnosis may be challenging, and high suspicion index should be maintained in immunosuppressed patients with unusual mucocutaneous lesions, even in non-endemic areas for mucocutaneous leishmaniasis
Gli uccelli delle isole circumsiciliane
Gli autori sintetizzano tutte le informazioni bibliografiche e inedite sulle specie che sino al 30 agosto
2015 sono state contattate almeno una volta nelle 14 isole circumsiciliane (Eolie, Ustica, Egadi, Pantelleria
e Pelagie), confrontando alla fine la lista complessiva con quella delle isole Maltesi. In totale
sono ad oggi note 434 specie (isole Maltesi incluse); molte di esse hanno mostrato nel corso dei secoli
una notevole capacitĂ di colonizzazione, fluttuando nel tempo o addirittura estinguendosi e ricolonizzando
alcune isole. Questi piccoli territori in mezzo al mare rappresentano ottimi siti di controllo dell’andamento
delle migrazioni nel corso dei decenni; alcune specie hanno chiaramente cambiato il loro
status rispetto al passato, aumentando o diminuendo. Nel corso di circa 15 anni in alcune di queste
isole (Ustica, Marettimo, Lampedusa e Linosa) sono stati condotti dei campi di inanellamento sia primaverili
sia autunnali che hanno permesso di inanellare 102.208 uccelli, in gran parte Passeriformes;
ciò ha consentito di raccogliere una notevole mole di dati sulle strategie migratorie, che vengono qui
brevemente presentati. Le piccole isole sono davvero importanti per gli uccelli migratori transahariani,
che devono sostare durante i loro lunghi viaggi per recuperare energie; la disponibilitĂ di risorse
sotto forma di frutti selvatici o di insetti (a seconda delle specie) consente a queste masse di migratori
di continuare il loro viaggio. La conservazione degli uccelli è dettata dalla Direttiva Uccelli e l’istituzione
delle Zone di Protezione Speciale ha proprio lo scopo di salvaguardare alcune specie in determinati
territori. Questo è un impegno preso da parte di tutti i Paesi dell’Unione Europea, proprio perché
le popolazioni di uccelli non conoscono confini amministrativi e la loro tutela va al di lĂ delle
competenze e degli interessi di un singolo Paese.
Per quanto riguarda le specie nidificanti, è risultata un’elevata correlazione negativa (r=-0,746), altamente
significativa (P=0,002) tra la capacitĂ dispersiva media delle specie e la superficie in km2 delle
isole. Le specie con minore capacitĂ dispersiva hanno colonizzato le isole di maggiori dimensioni, ma
non quelle piĂą piccole; questo con molta probabilitĂ dipende dalla eterogeneitĂ ambientale, a sua volta
legata alla dimensione delle isole ed alla loro posizione geografica. Nel caso delle isole circumsiciliane,
sembra che non sia tanto la distanza dalla costa a determinare il numero di specie, quanto le condizioni
ambientali e la posizione geografica; indubbiamente la posizione tirrenica delle isole settentrionali rappresenta un vantaggio per la presenza di habitat differenziati e la conseguente colonizzazione di specie
ad essi legate, mentre la posizione meridionale, influenzata dall’ariditĂ africana, riduce alcune possibilitĂ
colonizzatrici da parte di alcune specie di uccelli e rende altresì problematica la stessa esistenza di habitat
diversificati. Il numero delle specie nidificanti in un’isola è variabile nel tempo, essendovi specie che
vi nidificano in modo irregolare. La correlazione area/N° specie nelle isole circumsiciliane è pari a 0,58,
ma se si esclude l’isola di Pantelleria, sale a 0,86; essa è pari a 0,92 per le sole isole settentrionali (Eolie,
Ustica ed Egadi), mentre risulta 0,99 per le sole tre isole meridionali del Canale di Sicilia.Authors summarize all bibliographic and unpublished
information on bird species that have been detected at least one time up to 30th August 2015 in the
14 circum-sicilian islands (Eolian, Ustica, Egadi, Pantelleria and Pelagian Is.). The Appendix 1 compares
overall lists with that of the Maltese Is., also lying in the Sicilian waters. On the whole, 434
species are known till now (Maltese Is. included); many of them showed a high colonizing capacity
along the centuries, fluctuating or even becoming extinct and re-colonising some islands. These small
territories in the middle of the Mediterranean sea are very good check-control sites of long-term
migration trend; compared to the past, some species changed their status, increasing or declining.
Additionally, during the last 15 years in some of these islands (Ustica, Marettimo, Lampedusa and
Linosa) bird ringing activity has been carried out, both in spring and in autumn; it allowed to ring
102,208 birds, mainly Passeriformes; this opportunity allowed to collect a remarkable amount of data
on migration strategy, here presented. The small islands are very important stop-over sites for transsaharan
migratory birds, that must rest during their long journey to recover fuel in the form of fat; the
availability of natural resources, such as wild fruits or insects, allows these masses of migrant birds to
continue their trip. The conservation of birds has been established by the Bird Directive and the institution
of Zones of Special Protection has the aim to safeguard some species in some territories. This
agreement was signed by all countries of the EU, because bird populations do not know administrative
borders and their conservation lies beyond the interests and authorities of a single country.
Concerning breeding birds, a high negative correlation (r=-0.746, P=0.002) has been found
between the average dispersal power of species and the area in km2 of islands. Species with minor
dispersal power colonized the biggest but not the smallest islands; this, very probably depended on
habitat heterogeneity of islands, in turn linked to the size of them and to the geographical position,
more than to the distance from the continental land. Tyrrhenian position of northern islands is certainly
an advantage for the presence of diversified habitats and birds inhabiting them, whereas
southern position of Pantelleria and Pelagian Is., as well as Maltese Is., affected by African dryness,
decreases colonizing probabilities of some bird species and the same existence of diversified habitats.
The number of breeding species in each island varied along the time and some species bred
irregularly. The correlation area/No. species in the islands surrounding Sicily resulted to be 0.58,
but if we exclude Pantelleria Is., it grows to 0.86; besides, it grows to 0.92 if we consider only northern
islands (Eolian, Ustica and Egadi Is.), and to 0.99 if we consider only southern islands
Depression in patients with acute myocardial infarction: influence on autonomic nervous system and prognostic role. Results of a five-year follow-up study
Self-Affirmation Activates Brain Systems Associated with Self-Related Processing and Reward and is Reinforced by Future Orientation
Self-affirmation theory posits that people are motivated to maintain a positive self-view and that threats to perceived self-competence are met with resistance. When threatened, self-affirmations can restore self-competence by allowing individuals to reflect on sources of self-worth, such as core values. Many questions exist, however, about the underlying mechanisms associated with self-affirmation. We examined the neural mechanisms of self-affirmation with a task developed for use in a functional magnetic resonance imaging environment. Results of a region of interest analysis demonstrated that participants who were affirmed (compared with unaffirmed participants) showed increased activity in key regions of the brain’s self-processing (medial prefrontal cortex + posterior cingulate cortex) and valuation (ventral striatum + ventral medial prefrontal cortex) systems when reflecting on future-oriented core values (compared with everyday activities). Furthermore, this neural activity went on to predict changes in sedentary behavior consistent with successful affirmation in response to a separate physical activity intervention. These results highlight neural processes associated with successful self-affirmation, and further suggest that key pathways may be amplified in conjunction with prospection
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