This study's purpose was to investigate the phenomenon of hemispheric specialization for the pitch and rhythmic aspects of melody. Its research problems were to investigate the Influence of pitch, rhythm, and training on hemispheric specialization for pitch-plus-rhythm melodic fragments. A final problem was to examine the relationship between dlchotic ear scores and eye movements evidenced during melodic processing. Twenty musicians and twenty nonmuslcians, right-handed and equally divided as to gender, participated in the project. Accepted dlchotic testing and eye behavior indexing procedures were implemented to investigate each research problem. The dlchotic tape produced for the study contained five subtests In which pitch activity was variously greater than, less than, or equal to rhythmic activity.

abstract: It is commonly known that the left hemisphere of the brain is more efficient in the processing of verbal information, compared to the right hemisphere. One proposal suggests that hemispheric asymmetries in verbal processing are due in part to the efficient use of top-down mechanisms by the left hemisphere. Most evidence for this comes from hemispheric semantic priming, though fewer studies have investigated verbal memory in the cerebral hemispheres. The goal of the current investigations is to examine how top-down mechanisms influence hemispheric asymmetries in verbal memory, and determine the specific nature of hypothesized top-down mechanisms. Five experiments were conducted to explore the influence of top-down mechanisms on hemispheric asymmetries in verbal memory. Experiments 1 and 2 used item-method directed forgetting to examine maintenance and inhibition mechanisms. In Experiment 1, participants were cued to remember or forget certain words, and cues were presented simultaneously or after the presentation of target words. In Experiment 2, participants were cued again to remember or forget words, but each word was repeated once or four times. Experiments 3 and 4 examined the influence of cognitive load on hemispheric asymmetries in true and false memory. In Experiment 3, cognitive load was imposed during memory encoding, while in Experiment 4, cognitive load was imposed during memory retrieval. Finally, Experiment 5 investigated the association between controlled processing in hemispheric semantic priming, and top-down mechanisms used for hemispheric verbal memory. Across all experiments, divided visual field presentation was used to probe verbal memory in the cerebral hemispheres. Results from all experiments revealed several important findings. First, top-down mechanisms used by the LH primarily used to facilitate verbal processing, but also operate in a domain general manner in the face of increasing processing demands. Second, evidence indicates that the RH uses top-down mechanisms minimally, and processes verbal information in a more bottom-up manner. These data help clarify the nature of top-down mechanisms used in hemispheric memory and language processing, and build upon current theories that attempt to explain hemispheric asymmetries in language processing. / Dissertation/Thesis / Ph.D. Speech and Hearing Science 2013

This diploma thesis deals with the comparison of total replacement of a trapeziometacarpal joint with a hemispherical cup and replacement of the same joint with a conical cup. In both cases of implants, these are types of replacements with dual mobility. The focus of the diploma thesis is the comparison of the transfer of forces from the head of the prosthesis to the trapezius bone through the different shape of the cup. The work was processed using computer software ANSYS Workbench 19.3.

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Dans le cadre de cette thèse, nous investiguons la capacité de chaque hémisphère cérébral à utiliser l’information visuelle disponible lors de la reconnaissance de mots. Il est généralement convenu que l’hémisphère gauche (HG) est mieux outillé pour la lecture que l’hémisphère droit (HD). De fait, les mécanismes visuoperceptifs utilisés en reconnaissance de mots se situent principalement dans l’HG (Cohen, Martinaud, Lemer et al., 2003). Puisque les lecteurs normaux utilisent optimalement des fréquences spatiales moyennes (environ 2,5 - 3 cycles par degré d’angle visuel) pour reconnaître les lettres, il est possible que l’HG les traite mieux que l’HD (Fiset, Gosselin, Blais et Arguin, 2006). Par ailleurs, les études portant sur la latéralisation hémisphérique utilisent habituellement un paradigme de présentation en périphérie visuelle. Il a été proposé que l’effet de l’excentricité visuelle sur la reconnaissance de mots soit inégal entre les hémichamps. Notamment, la première lettre est celle qui porte habituellement le plus d’information pour l’identification d’un mot. C’est aussi la plus excentrique lorsque le mot est présenté à l’hémichamp visuel gauche (HVG), ce qui peut nuire à son identification indépendamment des capacités de lecture de l’HD. L’objectif de la première étude est de déterminer le spectre de fréquences spatiales utilisé par l’HG et l’HD en reconnaissance de mots. Celui de la deuxième étude est d’explorer les biais créés par l’excentricité et la valeur informative des lettres lors de présentation en champs divisés. Premièrement, nous découvrons que le spectre de fréquences spatiales utilisé par les deux hémisphères en reconnaissance de mots est globalement similaire, même si l’HG requière moins d’information visuelle que l’HD pour atteindre le même niveau de performance. Étonnament toutefois, l’HD utilise de plus hautes fréquences spatiales pour identifier des mots plus longs. Deuxièmement, lors de présentation à l’HVG, nous trouvons que la 1re lettre, c’est à dire la plus excentrique, est parmi les mieux identifiées même lorsqu’elle a une plus grande valeur informative. Ceci est à l’encontre de l’hypothèse voulant que l’excentricité des lettres exerce un biais négatif pour les mots présentés à l’HVG. De façon intéressante, nos résultats suggèrent la présence d’une stratégie de traitement spécifique au lexique. / In this thesis, we investigate the cerebral hemispheres’ ability to use the available visual information for word recognition in lateral periphery. It is generally acknowledged that the left hemisphere (LH) is more able at reading than the right (RH). Accordingly, the visuoperceptual mechanisms of the brain for word recognition are primarily localized in the LH (Cohen, Martinaud, Lemer et al., 2003). As normal readers use medium spatial frequencies (about 2,5 – 3 cycles per degree of visual angle) to recognize words, it is possible that the LH is better tuned for processing these spatial frequencies than the RH (Fiset, Gosselin, Blais et Arguin, 2006). Furthermore, studies concerned with reading abilities in the cerebral hemispheres commonly present words in visual periphery. However, the effect of visual eccentricity on word recognition is thought to be unequal between hemifields, notably because the first letter in a word usually carries the most information for its accurate identification. It is also the most eccentric letter when a word is presented in the LVF, which may cause a negative bias for the identification of words presented to the LVF regardless of the actual reading capacities of the RH. The main objective of the first study is to determine the spatial frequency tuning functions of the LH and RH for word recognition. The goal of our second study is to explore letter identification biases for words presented to the left and right visual fields as a function of eccentricity by varying the information value of letter positions. Firstly, we discover that the spatial frequency tuning of both hemispheres is globally similar, even though the LH requires less visual information than the RH to reach the same level of performance. Surprisingly however, the RH requires higher spatial frequencies to identify longer words. Secondly, we find that for LVF displays, the first letter, i.e. the most eccentric, is among the most accurately identified, even when it has a greater information value. This argues against the hypothesis that letter eccentricity exerts a negative bias for words presented to the LVF. Interestingly, our findings also suggest a lexical-specific processing strategy.

Dans le cadre de cette thèse, nous investiguons la capacité de chaque hémisphère cérébral à utiliser l’information visuelle disponible lors de la reconnaissance de mots. Il est généralement convenu que l’hémisphère gauche (HG) est mieux outillé pour la lecture que l’hémisphère droit (HD). De fait, les mécanismes visuoperceptifs utilisés en reconnaissance de mots se situent principalement dans l’HG (Cohen, Martinaud, Lemer et al., 2003). Puisque les lecteurs normaux utilisent optimalement des fréquences spatiales moyennes (environ 2,5 - 3 cycles par degré d’angle visuel) pour reconnaître les lettres, il est possible que l’HG les traite mieux que l’HD (Fiset, Gosselin, Blais et Arguin, 2006). Par ailleurs, les études portant sur la latéralisation hémisphérique utilisent habituellement un paradigme de présentation en périphérie visuelle. Il a été proposé que l’effet de l’excentricité visuelle sur la reconnaissance de mots soit inégal entre les hémichamps. Notamment, la première lettre est celle qui porte habituellement le plus d’information pour l’identification d’un mot. C’est aussi la plus excentrique lorsque le mot est présenté à l’hémichamp visuel gauche (HVG), ce qui peut nuire à son identification indépendamment des capacités de lecture de l’HD. L’objectif de la première étude est de déterminer le spectre de fréquences spatiales utilisé par l’HG et l’HD en reconnaissance de mots. Celui de la deuxième étude est d’explorer les biais créés par l’excentricité et la valeur informative des lettres lors de présentation en champs divisés. Premièrement, nous découvrons que le spectre de fréquences spatiales utilisé par les deux hémisphères en reconnaissance de mots est globalement similaire, même si l’HG requière moins d’information visuelle que l’HD pour atteindre le même niveau de performance. Étonnament toutefois, l’HD utilise de plus hautes fréquences spatiales pour identifier des mots plus longs. Deuxièmement, lors de présentation à l’HVG, nous trouvons que la 1re lettre, c’est à dire la plus excentrique, est parmi les mieux identifiées même lorsqu’elle a une plus grande valeur informative. Ceci est à l’encontre de l’hypothèse voulant que l’excentricité des lettres exerce un biais négatif pour les mots présentés à l’HVG. De façon intéressante, nos résultats suggèrent la présence d’une stratégie de traitement spécifique au lexique. / In this thesis, we investigate the cerebral hemispheres’ ability to use the available visual information for word recognition in lateral periphery. It is generally acknowledged that the left hemisphere (LH) is more able at reading than the right (RH). Accordingly, the visuoperceptual mechanisms of the brain for word recognition are primarily localized in the LH (Cohen, Martinaud, Lemer et al., 2003). As normal readers use medium spatial frequencies (about 2,5 – 3 cycles per degree of visual angle) to recognize words, it is possible that the LH is better tuned for processing these spatial frequencies than the RH (Fiset, Gosselin, Blais et Arguin, 2006). Furthermore, studies concerned with reading abilities in the cerebral hemispheres commonly present words in visual periphery. However, the effect of visual eccentricity on word recognition is thought to be unequal between hemifields, notably because the first letter in a word usually carries the most information for its accurate identification. It is also the most eccentric letter when a word is presented in the LVF, which may cause a negative bias for the identification of words presented to the LVF regardless of the actual reading capacities of the RH. The main objective of the first study is to determine the spatial frequency tuning functions of the LH and RH for word recognition. The goal of our second study is to explore letter identification biases for words presented to the left and right visual fields as a function of eccentricity by varying the information value of letter positions. Firstly, we discover that the spatial frequency tuning of both hemispheres is globally similar, even though the LH requires less visual information than the RH to reach the same level of performance. Surprisingly however, the RH requires higher spatial frequencies to identify longer words. Secondly, we find that for LVF displays, the first letter, i.e. the most eccentric, is among the most accurately identified, even when it has a greater information value. This argues against the hypothesis that letter eccentricity exerts a negative bias for words presented to the LVF. Interestingly, our findings also suggest a lexical-specific processing strategy.

An important field of interpreting research, neurolinguistic approach emerged soon after the shift towards an interdisciplinary approach to research into interpreting. The mutually beneficial collaboration between neurolinguists and interpreters has been centred mainly on the issue of language representation in interpreters as bilingual subjects, namely on the role each of the two cerebral hemispheres plays depending on the task (automatic speech production, shadowing, translation of single words or phrases, simultaneous interpreting), choice of interpreting strategy (literal vs. meaning-based interpretation) or on the direction of interpreting (B to A vs. A to B language). The thesis focuses on the research into hemispheric lateralization done at SSLMIT, University of Trieste, Italy - the place where, in the 80s, the neurolinguistic approach was first adopted. The Trieste School then remained its centre for approximately ten years. The beginning chapters of this theoretical study present the fundamentals of neuranatomy, neurophysiology and neurolinguistics, necessary for understanding of the mental processes underlying simultaneous interpretation. Furthermore, relevant neuroimaging methods are introduced that either have already been used in or could be applied to interpreting research in the...

Esta pesquisa tem como objetivo central a identificação e análise dos principais atores e temas envolvidos na internacionalização do conflito armado na Colômbia. Este estudo entende por internacionalização a participação de atores estrangeiros na formulação e/ou implementação das tentativas de resolução do referido conflito. O recorte temporal pertinente aos propósitos da pesquisa estende-se do Governo César Gaviria (1990-1994) ao final do primeiro governo de Álvaro Uribe (2002-2006), na medida em que, no período anterior, não era possível observar um envolvimento externo considerável nos processos de paz na Colômbia. Os atores selecionados para uma análise mais atenta foram: EUA e OEA, cujas agendas correspondem à proposta hemisférica predominante; e UE e ONU, as quais representam as iniciativas globais voltadas à resolução do conflito. A principal conclusão deste estudo incide sobre o agrupamento das propostas internacionais em torno desses dois pólos: hemisféricas (das quais os EUA constituem o principal expoente) e globais (que têm na UE o seu ponto focal). A primeira é dotada de vultosos recursos, apresenta um caráter marcadamente militar e encontra na erradicação das drogas e no confronto às guerrilhas as suas principais estratégias. Por outro lado, o traço preponderante da segunda é a ênfase nos direitos humanos, na ajuda humanitária e na negociação com as guerrilhas. A proposta emergente do pólo europeu não foi capaz de oferecer um contra-peso à intervenção estadunidense, tanto em termos de recursos financeiros, como de fatores geopolíticos. Assim, a principal conclusão desta pesquisa é que a internacionalização do conflito armado não se manifesta de forma homogênea: embora a participação dos atores estrangeiros tenha ocorrido no âmbito global, as iniciativas hemisféricas são predominantes, especialmente se analisarmos as preferências do governo colombiano. / This study aims to identify and analyze the main actors and themes related to the Colombian armed conflict internationalization. It understands internationalization as the participation of foreign players in the designing and implementation of programs regarding the resolution of the conflict. The period of interest to this study dates back to the government César Gaviria (1990-1994) until the end of the first Álvaro Uribe administration, since there was no considerable external participation on Colombia peace processes previously. The selected players for a more detailed approach were: US and OAS, whose agendas correspond to the predominant proposal in the hemisphere; and EU and UN, which represent the global initiatives towards the conflict resolution. The main conclusion of this study is related to the concentration of international proposals around these poles: hemispheric (whose main exponent is the US) and global (concentrated on EU). The first involves a huge amount of resources, presents a markedly military aspect and privileges the illicit crops eradication and confrontation against guerrillas as strategies. On the other hand, the dominant characteristic of the second is the emphasis on human rights, humanitarian aid and the negotiation with the guerrillas. The proposal that emerged from Europe was not able to offer compensation to American intervention in terms of financial resources and geopolitical factors. Therefore, the main conclusion of this study is that the internationalization of the armed conflict is not homogeneous throughout the world: the participation of external actors is global, but the hemispherical initiatives are predominant, especially if we consider Colombian governments preferences.